Major Difference Between Sp And Trigger
Dec 2, 2006hi
stored procedure and trigger which runs on serverside and which runs on client side.
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Whats The Major Difference Between Sql Server 2005 Standard And Developer Edition?
Feb 25, 2008Hi,
I have Sql server 2005 Standard edition on my system and was wondering whats the difference between Standard edition and developer edition which one is better..most of the things that i do on sql server is
write sprocs, create table etc...
any ideas will be appreciated..
regards
Karen
@@TRANCOUNT Difference Between SQL 7 And SQL 2000 In Trigger
Jul 20, 2005During testing of an application, i noticed a difference betweenSQL 2000 and SQL 7, both with identical config.In a nutshell:A table has a trigger for UPDATE and DELETE.When a column in the table is UPDATED the following happens:In autocommit mode, when entering a trigger the trancount equals1 for both SQL 7 and 2000.When the same update is performed in an explicit transactionin SQL 7 @@TRANCOUNT equal 2, and in SQL 2000 @@TRANCOUNT equals 1.Configuration is the same and there are no implicit transactions.I don't need a work around as this will invalidate the migrationprocess as both products should behave identically.What would influence the difference or why is there a difference???Is there something which has been overlooked?================================================== =======The following code replicates the problemEnsure implicit transactions are off in both versions at the serverlevel, thus defaulting to autocommitted mode.Ensure sp_configure settings are identical.Step 1: Create a DB called test:Step 2: Execute the following under the context of test DB.if exists (select * from dbo.sysobjects where id =object_id(N'[dbo].[trigtest]') and OBJECTPROPERTY(id, Outrigger') = 1)drop trigger [dbo].[trigtest]GOif exists (select * from dbo.sysobjects where id =object_id(N'[dbo].[test]') and OBJECTPROPERTY(id, N'IsUserTable') = 1)drop table [dbo].[test]GOif exists (select * from dbo.sysobjects where id =object_id(N'[dbo].[trancount]') and OBJECTPROPERTY(id, N'IsUserTable')= 1)drop table [dbo].[trancount]GOCREATE TABLE [dbo].[test] ([id] [int] IDENTITY (1, 1) NOT NULL ,[text] [char] (10) NULL) ON [PRIMARY]GOCREATE TABLE [dbo].[trancount] ([id] [int] IDENTITY (1, 1) NOT NULL ,[trancount] [int] NOT NULL) ON [PRIMARY]GOCREATE TRIGGER trigtest ON [dbo].[test]FOR UPDATE, DELETEASdeclare @trancount intselect @trancount = @@TRANCOUNTinsert into trancount ( trancount ) values ( @trancount )Step 3: Run the following against the DB, then check trancount table.-- Add a record to the test table (trigger will not fire)insert into test (text) values ( 'xxxx' );go-- Update the value (autocommit mode) to fire trigger-- Under SQL 7 and 2000, trancount table will only indicate 1tranaction open.-- This is being performed in autocommit mode.update test set text = 'test1'go-- Update value using an explicit transaction-- Under SQL 7, trancount will equal 2 in trigger, in SQL 2000trancount equals 1begin transactionupdate test set text = 'test2'commit workgo
View 5 Replies View RelatedSQL Major Help!
May 21, 2008Hello,
I need some major help, I need to make a database using SQL server for a forum, now I am using pHpBB, but i need that database. I was thinking about it, it doesnt need to be complicated or anything. I really have no idea where to start so any help.
Thank you in advance
Need Some MAJOR Help, PLEASE
Apr 8, 2007I have a new business, and a part of that business includes receiving large amounts of data from time to time. I just found out yesterday that I'm going to be receiving about 1TB of data from an new client! I'm not set up at all for this large of a data set.
I want to use SQL Server as my database. Can I load SQL on a Desktop PC without having to buy a server? How?
I don't have a clue as to how I need to get set up for this data...hardware or software. Any advice you can give will be outstanding!!!!!
Thanks.
Major DB Problems!!!
Jan 22, 2008I have a site that was supposed to go live yesterday.I am using M$ SQL Express 2005 and the Express Manager.I setup everything using Windows authentication on my local computer. I backed up the database through the manager and simply did a restore to the live database server.I copied my aspx files and everything else.I changed my connection string to allow for SQL Authentication (because I was having trouble with Windows authentication).For some reason, my SQL authenticated user can do whatever it wants within the SQL manager, but I am unable to login to the site. I get no errors, just the usual failed login attempt text.Can someone please help. I don't know where to start on this one.Thanks,Joshua Foulk
View 6 Replies View RelatedHELP! Major LDF Problem...
May 26, 2004I hope I haven't messed up! I was importing some data, and it started taking too long and seemed to have locked up, I did a cold boot and when I tried to open the db it would just load...
I have then detached it and tried to reattach the db, but it seems to just load forever.. I let it sit there for an hour and still nothing...
the DB has a 17gig LDF file and I can't attach without it...
PLEASE HELP!
Major Problem
Apr 7, 2008For some reason when I'm trying to restore a back up, I'm encountering this problem, I've asked numerous people and been in and out of chatrooms all day and night, has anyone got any idea what to do?
/Sil
Having A MAJOR Brain Fart Here...
Feb 18, 2007Guys I'm sorry to be asking such a routine question...
I'm having trouble figuring out how to make this function dynamic enough to handle multiple insert statements.1 public int Add()
2
3 {
4
5 string SQL;
6
7 SQL = "INSERT INTO [BuildingInterior] (PropertyID, CeilingHeight, " +
8
9 "LoadingDocks, PassengerElevators, FreightElevators, PassengerEscalators, " +
10
11 "FireSprinklersID, SecurityCameras, SmokeDetection, FireAlarms, " +
12
13 "GasDetection, SecureAccess, HeatTypeID, AirConditioningID, " +
14
15 "AirExchange, InternetAccessID, InteriorDescription) " +
16
17 "VALUES ( @PropertyID, @CeilingHeight, " +
18
19 "@LoadingDocks, @PassengerElevators, @FreightElevators, @PassengerEscalators, " +
20
21 "@FireSprinklersID, @SecurityCameras, @SmokeDetection, @FireAlarms, " +
22
23 "@GasDetection, @SecureAccess, @HeatTypeID, @AirConditioningID, " +
24
25 "@AirExchange, @InternetAccessID, @InteriorDescription)";
26
27 PropertyDB myConnection = new PropertyDB();
28
29 SqlConnection conn = myConnection.GetOpenConnection();
30
31 SqlCommand cmd = new SqlCommand(SQL, conn);
32
33 cmd.Parameters.Add("@PropertyID", SqlDbType.Int).Value = PropertyID;
34
35 cmd.Parameters.Add("@CeilingHeight", SqlDbType.NVarChar, 50).Value = CeilingHeight;
36
37 cmd.Parameters.Add("@LoadingDocks", SqlDbType.NVarChar, 50).Value = LoadingDocks;
38
39 cmd.Parameters.Add("@PassengerElevators", SqlDbType.NVarChar, 50).Value = PassengerElevators;
40
41 cmd.Parameters.Add("@FreightElevators", SqlDbType.NVarChar, 50).Value = FreightElevators;
42
43 cmd.Parameters.Add("@PassengerEscalators", SqlDbType.NVarChar, 50).Value = PassengerEscalators;
44
45 cmd.Parameters.Add("@FireSprinklersID", SqlDbType.Int).Value = FireSprinklersID;
46
47 cmd.Parameters.Add("@SecurityCameras", SqlDbType.NVarChar, 50).Value = SecurityCameras;
48
49 cmd.Parameters.Add("@SecurityAlarms", SqlDbType.NVarChar, 50).Value = SecurityAlarms;
50
51 cmd.Parameters.Add("@SmokeDetection", SqlDbType.NVarChar, 50).Value = SmokeDetection;
52
53 cmd.Parameters.Add("@FireAlarms", SqlDbType.NVarChar, 50).Value = FireAlarms;
54
55 cmd.Parameters.Add("@GasDetection", SqlDbType.NVarChar, 50).Value = GasDetection;
56
57 cmd.Parameters.Add("@SecureAccess", SqlDbType.NVarChar, 50).Value = SecureAccess;
58
59 cmd.Parameters.Add("@HeatTypeID", SqlDbType.Int).Value = HeatTypeID;
60
61 cmd.Parameters.Add("@AirConditioningID", SqlDbType.Int).Value = AirConditioningID;
62
63 cmd.Parameters.Add("@AirExchange", SqlDbType.NVarChar, 50).Value = AirExchange;
64
65 cmd.Parameters.Add("@InternetAccessID", SqlDbType.Int).Value = InternetAccessID;
66
67 cmd.Parameters.Add("@InteriorDescription", SqlDbType.NVarChar, 50).Value = InteriorDescription;
68
69 cmd.ExecuteNonQuery();
70
71 cmd.CommandText = "SELECT @@IDENTITY";
72
73 this.BuildingInteriorID = Int32.Parse(cmd.ExecuteScalar().ToString());
74
75 conn.Close();
76
77 return this.BuildingInteriorID;
78
79 }
80
Should I just pass an array of column names and use the AddWithValues SqlCommand method while looping through the array?
Any comments are greatly welcomed.
Major Time Out Issue
Mar 27, 2007I have created a database with three tables. The database has been up for a month now and contains about 20,000 records. In order to improve performance and resolve some issues I an attempting to change some of the table information. i.e. allow nulls in a few fields. When I use TSQL or the GUI to make these changes I get the following error: Timeout expired. The timeout period elapsed prior to completion of the operation or server not responding.
Source: .Net SQLClient Data Provider
I have SQL Server Express SP2 installed with .Net framework v3.0
Note: This issue appears when I attempt to delete a row from a table as well.
Any thoughts?
Simple Report, Major Problem
Apr 13, 2008
I have a report with a table and three columns. Whenever the data in one of the columns cannot fit on a single page it continues on the next page BUT, there is no header on the next page and the data in the other two columns repeats itself on the next page. (This behavior happens when I export to PDF)
Is this a known issue? I have tried every setting I could think of.
Thanks
Y Axis Labels, Major Gridline
Jul 5, 2006I have a horizontal barchart with integer values, both positive and negative. Major gridlines are shown and I have not specified the interval or the label format. Sometimes the gridline labels (Y axis) show decimal values. Is there anyway to format these? I have tried to format the labels as "#0" but then I see labels occuring twice. I have also played with the intervals, but then sometimes, depending on the values, the zero line is not being shown.
Does anybody have an idea?
Thanks in advance!
Joos
Reporting Services X64 Major Problem
Mar 13, 2007Hi,
We have a product that is developed in ASP and works with SQL Server 2000 or 2005. Since it€™s an ERP, we also use Reporting Services 2000 or 2005. Our application needs 3 registered DLLs that were, a long time ago, developed to support our entire application.
Since we are using Windows Server 2003 x64 editions in our clients with SQL Server 2005 x64 edition, we managed to register the 32 bit DLLs in the 64 bit system. We installed them as a COM+ component, ran the command €ścscript.exe adsutil.vbs set W3SVC/AppPools/Enable32BitAppOnWin64 true€? and our application worked fine.
This command caused the IIS to use the .NET 2.0 32 bit version so that our DLLs could be correctly invoked.
But now Reporting Services doesn€™t work because it needs the 64 bit version of the .Net framework. When I try to connhecto to localhost/reports, I get the error "%1 is not a valid Win32 application".
Is there any workaround to this problem so that i can deploy the application and the database in the same machine?
Can Anyone Give Me A Layman's Explanation Of The Difference Between CURRENT_TIMESTAMP And GETDATE() (if There Is A Difference)?
Oct 24, 2007Question is in the subject.
Thanks in advance
-Jamie
Major Problem With @@IDENTITY, Treeview And GUID
Nov 14, 2004Hi,
I'm trying to insert data into locally stored database (SQL Server).
The data I want inserted, is presented in a Treeview control and the data is fetched from a Webservice. The data is returned in form of a dataset.
The treeview contains checkboxes allowing a user to select what to install in the locally stored database.
To sum up:
1. Get data from a webservice' not my problem
2. Present data in a Treview control' not my problem
3. Allow to user to select which data to install' not my problem
4. Insert data that the user has selected into my db' MY PROBLEM!!!!
The Treeview looks like this.
- Group1
| | ---- Rule1.1
| | ---- Rule1.2
|
- Group2
| | ---- Rule2.1
| | ---- Rule2.2
| | ---- Rule2.3
.....
The Treeview is generated with DataRelations between Group and Rule.
My locally stored database is designed by a third party provider and therefore the database must not be altered.
The table I want to store data in is called "Groups" and it looks like this:
GroupID uniqueidentifier ' (newid())
GroupName nvarchar(50)
ParentGroupID uniqueidentifier' if grouptype = 0 then ParentGroupID must have a value.
GroupType tinyint ' 0 = subgroup, 1 = "top"group
Data in the table "Groups" would look like this:
GroupID GroupNameParentGroupIDGroupType
---------------------------------------------------------
{000001...}Group1<NULL>1
{000011...}Rule1.1{000001...}0
{000012...}Rule1.2{000001...}0
{000002...}Group2<NULL>1
{000021...}Rule2.1{000002...}0
{000022...}Rule2.2{000002...}0
{000023...}Rule2.3{000002...}0
The third party also created a stored procedure called pr_AddGroup taking the following parameters:
@GroupName ' can be both the RuleName and the GroupName
@GroupType ' can be 0 for subgroup or 1 for "top"group
@ParentGroup ' GUID
The problem with this stored procedure is that it does not have return value, which is here my problem actually lies.
If it returned @@IDENTITY I could use this as the parameter for @ParentGroup.
Instead I figure I must create two sqlCommand's (one calling pr_AddGroup and another calling SELECT @@IDENTITY to get the newly created record).
My SQL Commands look like this
Dim cmd As SqlCommand
Dim Conn As SqlConnection = New SqlConnection
Conn.ConnectionString = "Data Source=myServer;Initial Catalog=myTable;Integrated Security=SSPI"
cmd = New SqlCommand
cmd.CommandType = CommandType.StoredProcedure
cmd.Connection = Conn
cmd.CommandText = "pr_AddGroup"
cmd.Parameters.Add(New SqlParameter("@GroupName", SqlDbType.NVarChar, 50, ParameterDirection.Input))
cmd.Parameters.Add(New SqlParameter("@GroupType", SqlDbType.TinyInt, ParameterDirection.Input))
cmd.Parameters.Add(New SqlParameter("@ParentGroup", SqlDbType.UniqueIdentifier, ParameterDirection.Input))
dim cmd2 as SqlCommand
cmd2 = new SqlCommand
cmd2.commandtype = commandtype.Text
cmd2.commandtext = "SELECT @@IDENTITY as ID FROM Groups"
cmd2.connection = Conn
dim ParentGroupGUID as system.guid
To get the data inserted in the Groups table I would something like the following, but the code is very ugly
(and it doesn't work either);
For Each Group In TreeView1.Nodes ' Loop through Groups
If Group.Checked Then
cmd.Parameters("@GroupName").Value = Group.Text.ToString
cmd.Parameters("@GroupType").Value = 1
cmd.ExecuteNonQuery()
ParentGroupGUID = cmd2.executescalar()
End If
For Each Rule In Group.Nodes ' Loop through Rules.
If Rule.Checked Then
cmd.Parameters("@GroupName").Value = Group.Text.ToString
cmd.Parameters("@GroupType").Value = 1
cmd.Parameters("@ParentGroup").value = ParentGroupGUID
cmd.ExecuteNonquery()
End If
Next
Next
I've spent the last 5 hours figuring out this problem, so ANY help is appreciated :-)
Having Major Problems With My Insert Query Logic
Aug 20, 2004I have a perl program that is looping through a hash of a hash. I need to Update any existing records but also insert any new records in the table using collected data in the hash.
Life would be very simple if it was possible to use a Where Clause in an Insert statement but not does not work.
Here is some example code from my program:
sub Test{
foreach my $table(keys %$HoH){
foreach my $field(keys %{$HoH->{$table}}){
if($table eq "CPU"){
my $CPUstatement = "INSERT INTO CPU(CPUNumber, Name, MaxClockSpeed, SystemNetName)
Values ('$field',
'$HoH->{CPU}{$field}{Name}',
'$HoH->{CPU}{$field}{MaxClockSpeed}' ,
'$HoH->{Host}{SystemNetName}')";
print "$CPUstatement";
if ($db->Sql($CPUstatement))
{
print "Error on SQL Statement";
Win32::ODBC::DumpError();
}
else
{
print "successful";
}
}
}
}
}
Thanks,
Laura
SqlServer 2000 Enterprise Manager - Major Bug?
Jul 20, 2005I had a problem today where I could not see column names and alltables had a _1 after them when viewing a Sql Server view inEnterprise Managere.g.TableName Company when added to the view would be named Company_1 andthe only columns available were 1 which was *(All Columns)After looking through the news groups I saw several occurrences ofthis problem but no answers that gave a fixAfter some investigation I found that it is caused when the databasename in SqlServer has a . in it!Test1 >> Fine the view designer works fineTest1.6 >> Problems as listed aboveI don't see why Enterprise Manager allows database names with .'s ifit is going to create such problems.
View 1 Replies View RelatedMajor Query Optimiser Weirdness With UDFs And SPs On SQL 2000
Jul 20, 2005There is something very strange going on here. Tested with ADO 2.7 andMSDE/2000. At first, things look quite sensible.You have a simple SQL query, let's sayselect * from mytab where col1 = 1234Now, let's write a simple VB program to do this query back to anMSDE/2000 database on our local machine. Effectively, we'llrs.open sSQLrs.closeand do that 1,000 times. We wont bother fetching the result set, itisn't important in this example.No problem. On my machine this takes around 1.6 seconds and modifyingthe code so that the column value in the where clause changes eachtime (i.e col1 = nnnn), doesn't make a substantial difference to thistime. Well, that all seems reasonable, so moving right along...Now we do it with a stored procedurecreate procedure proctest(@id int)asselect * from mytab where col1 = @idand we now find that executingproctest nnnn1,000 times takes around 1.6 seconds whether or not the argumentchanges. So far so good. No obvious saving, but then we wouldn'texpect any. The query is very simple, after all.Well, get to the point!Now create a table-returning UDFcreate function functest(@id int) returns table asreturn(select * from mytab where col1 = @id)try calling that 1,000 times asselect * from functest(nnnn)and we get around 5.5 seconds on my machine if the argument changes,otherwise 1.6 seconds if it remains the same for each call.Hmm, looks like the query plan is discarded if the argument changes.Well, that's fair enough I guess. UDFs might well be more expensive...gotta be careful about using them. It's odd that discarding the queryplan seems to be SO expensive, but hey, waddya expect?. (perhaps theUDF is completely rebuilt, who knows)last test, then. Create an SP that calls the UDFcreate procedure proctest1(@id int)asselect * from functest(@id)Ok, here's the $64,000 question. How long will this take if @idchanges each time. The raw UDF took 5.5 seconds, remember, so thisshould be slightly slower.But... IT IS NOT.. It takes 1.6 seconds whether or not @id changes.Somehow, the UDF becomes FOUR TIMES more efficient when wrapped in anSP.My theory, which I stress is not entirely scientific, goes somethinglike this:-I deduce that SQL Server decides to reuse the query plan in thiscircumstance but does NOT when the UDF is called directly. This iscounter-intuitive but it may be because SQL Server's query parser istuned for conventional SQL i.e it can saywell, I've gotselect * from mytab WHERE [something or other]and now I've gotselect * from mytab WHERE [something else]so I can probably re-use the query plan from last time. (I don't knowif it is this clever, but it does seem to know when twotextually-different queries have some degree of commonality)Whereas withselect * from UDF(arg1)andselect * from UDF(arg2)it goes... hmm, mebbe not.... I better not risk it.But withsp_something arg1andsp_something arg2it goes... yup, i'll just go call it... and because the SP was alreadycompiled, the internal call to the UDF already has a query plan.Anyway, that's the theory. For more complex UDFs, by the way, theperformance increase can be a lot more substantial. On a big complexUDF with a bunch of joins, I measured a tenfold increase inperformance just by wrapping it in an SP, as above.Obviously, wrapping a UDF in an SP isn't generally a good thing; theidea of UDFs is to allow the column list and where clause to filterthe rowset of the UDF, but if you are repeatedly calling the UDF withthe same where clause and column list, this will make it a *lot*faster.
View 3 Replies View RelatedMajor SQL Server/SSIS 2005 Performance Issue
Mar 24, 2006SQL Server 2005 is installed on a brand new 64-bit server (Windows 2003 x64 std. Edition, 2.4 Ghz AMD opteron- 2cpu, 8.8 Gb of RAM). There is barely few hundred rows of data scattered among few tables in one database.
SQL server and SSIS performace grossly degrades overnight and in the morning everything is slow including the clicking of tool bar selection.It takes 3 seconds to execute a simple select statement against an empty table.
It takes15-20 seconds to execute a SSIS package that normally would take 2-3 seconds.
But once SQL Server is restarted, everything returns to normal and the performance is good all day and then the next day everything is slow again.
Thank you for your help.
Ssis Security Short Coming, Major Issues
Jan 6, 2006Hello,
I feel like ssis encryption model has a serious flaw. Especially when linked to SQL Agent jobs.
I have posted and others have posted messages about this. Something is plain wrong with ssis encryption keys and password protection. Also, you do not have the choice not to protect the packages. In my case, protecting packages is completely useless.
Here is the story.
After this post
http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=131340&SiteID=1&mode=1
I created config files for al my packages connections passswords.
Now, by our IT Policy, I had to change again my password and of course, all packages now return multiple errors when I open them.
Hopefully, the config file did its job and the packages are ran anyways by SQL Agent, however, having to manually retype and resave all packages not to have the errors is just a plain hassle. Not to speak about people not using the config files and the correct "Run As" sql agent account.
I stress the fact that in a real world production environment all packages are driven by SQL Agent jobs and MUST run automatically.
Here is the error I get after opening a package after changing my password:
Error 1 Error loading Constants05.dtsx: Failed to decrypt protected XML node "DTS:Password" with error 0x8009000B "Key not valid for use in specified state.". You may not be authorized to access this information. This error occurs when there is a cryptographic error. Verify that the correct key is available. c:projectsssis packagesssis constantsConstants05.dtsx 1 1
So Why is'nt this key automatically adjusted after Windows NT Domain password Change?
How can I refresh the key, not to have to reype all the packages connections passwords and rebuilding, Checkin-in again all the stuff?
I do not think the solution is "Use an application account which password never changes when you create your ssis packages" however at this time, this is the only solution I can think of.
How do you guys deal with this problem?
I still do not understand the ssis security model I feel it is diconnected from the reality and unpracticable in a production environment like mine.
Thanks
Philippe
Major Problem With REPLACE-expression In The Derived Column Transformation
Apr 26, 2006I'm importing a csv-file delimited with semicolons. Firstly I LTRIM the columns "in place" and the data imports fine. All the numbers in right columns in the target table. Then I add another Derived Colum Transformation to replace decimal character comma (,) to a dot (.) in order to convert the string/varchar value to numeric. But here I run into trouble. Running the task ends in success but the result in the target table (same as above) is not. All the commas are now dots as expected but what is worse is that SSIS have added values in cells that should not be there. I get values in cells that shoud be empty!
Shortly: Only LTRIM([Column1]) as expression and "Derived Column" as Replace 'Column1' works OK.
But adding REPLACE-expression (i.e REPLACE(LTRIM([Column1]) , "," , ".") to this breaks things up
I'm aware that I could do this with SQL but this is not the point...
Any ideas?
BR Jompe
MAJOR PROBLEM: New SQL2005 Installation Performance Problem.
Sep 26, 2006We are experiencing a major issue since upgrading from SQL2000 to SQL2005 over the weekend. Starting today, it appears that the performance of SQLServer reaches a limit every 15 minutes.
Our configuration is as follows:
Window Server 2K3 x64 Enterprise
SQLServer 2005 x64 Enterprise
HP DL585 with 4 dual core Opterons
32 GB of RAM
2 TB EMC SAN
At first, I thought there was a memory pressure problem, since I had the default max memory set. After changing the max memory to only 25 GB (out of 32 available), the issue went away temporarily. However, after 15-20 minutes, the number of batches/sec dropped in half, and remained after half until I changed the max memory setting again. Over the course of the day, I was able to fix the issue each time by just changing the max memory by 1MB. (From 30,000 to 29,999 and back from 29,999 to 30,000). Each time, the batches/sec counter immediately doubles and remains there for about 15-20 minutes. None of the SQL statements have changed since upgrading.
I have found this post, which talks about a similar issue at the end of the thread:
http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=746299&SiteID=1
Any ideas?...this is frustrating to no end.
Thanks!
Ryan
CLR-Based Trigger? Recursive Trigger? Common Table Expression?
Nov 14, 2006Hey,
I'm new to this whole SQL Server 2005 thing as well as database design and I've read up on various ways I can integrate business constraints into my database. I'm not sure which way applies to me, but I could use a helping hand in the right direction.
A quick explanation of the various tables I'm dealing with:
WBS - the Work Breakdown Structure, for example: A - Widget 1, AA - Widget 1 Subsystem 1, and etc.
Impacts - the Risk or Opportunity impacts for the weights of a part/assembly. (See Assemblies have Impacts below)
Allocations - the review of the product in question, say Widget 1, in terms of various weight totals, including all parts. Example - September allocation, Initial Demo allocation, etc. Mostly used for weight history and trending
Parts - There are hundreds of Parts which will eventually lead to thousands. Each part has a WBS element. [Seems redundant, but parts are managed in-house, and WBS elements are cross-company and issued by the Government]
Parts have Allocations - For weight history and trending (see Allocations). Example, Nut 17 can have a September 1st allocation, a September 5th allocation, etc.
Assemblies - Parts are assemblies by themselves and can belong to multiple assemblies. Now, there can be multiple parts on a product, say, an unmanned ground vehicle (UGV), and so those parts can belong to a higher "assembly" [For example, there can be 3 Nut 17's (lower assembly) on Widget 1 Subsystem 2 (higher assembly) and 4 more on Widget 1 Subsystem 5, etc.]. What I'm concerned about is ensuring that the weight roll-ups are accurate for all of the assemblies.
Assemblies have Impacts - There is a risk and opportunity impact setup modeled into this design to allow for a risk or opportunity to be marked on a per-assembly level. That's all this table represents.
A part is allocated a weight and then assigned to an assembly. The Assemblies table holds this hierarchical information - the lower assembly and the higher one, both of which are Parts entries in the [Parts have Allocations] table.
Therefore, to ensure proper weight roll ups in the [Parts have Allocations] table on a per part-basis, I would like to check for any inserts, updates, deletes on both the [Parts have Allocations] table as well as the [Assemblies] table and then re-calculate the weight roll up for every assembly. Now, I'm not sure if this is a huge performance hog, but I do need to keep all the information as up-to-date and as accurate as possible. As such, I'm not sure which method is even correct, although it seems an AFTER DML trigger is in order (from what I've gathered thus far). Keep in mind, this trigger needs to go through and check every WBS or Part and then go through and check all of it's associated assemblies and then ensure the weights are correct by re-summing the weights listed.
If you need the design or create script (table layout), please let me know.
Thanks.
Trouble With Update Trigger Modifying Table Which Fired Trigger
Jul 20, 2005Are there any limitations or gotchas to updating the same table whichfired a trigger from within the trigger?Some example code below. Hmmm.... This example seems to be workingfine so it must be something with my specific schema/code. We'reworking on running a SQL trace but if anybody has any input, fireaway.Thanks!create table x(Id int,Account varchar(25),Info int)GOinsert into x values ( 1, 'Smith', 15);insert into x values ( 2, 'SmithX', 25);/* Update trigger tu_x for table x */create trigger tu_xon xfor updateasbegindeclare @TriggerRowCount intset @TriggerRowCount = @@ROWCOUNTif ( @TriggerRowCount = 0 )returnif ( @TriggerRowCount > 1 )beginraiserror( 'tu_x: @@ROWCOUNT[%d] Trigger does not handle @@ROWCOUNT[color=blue]> 1 !', 17, 127, @TriggerRowCount) with seterror, nowait[/color]returnendupdate xsetAccount = left( i.Account, 24) + 'X',Info = i.Infofrom deleted, inserted iwhere x.Account = left( deleted.Account, 24) + 'X'endupdate x set Account = 'Blair', Info = 999 where Account = 'Smith'
View 1 Replies View RelatedGeneric Audit Trigger CLR C#(Works When The Trigger Is Attached To Any Table)
Dec 5, 2006This Audit Trigger is Generic (i.e. non-"Table Specific") attach it to any tabel and it should work. Be sure and create the 'Audit' table first though.
The following code write audit entries to a Table called
'Audit'
with columns
'ActionType' //varchar
'TableName' //varchar
'PK' //varchar
'FieldName' //varchar
'OldValue' //varchar
'NewValue' //varchar
'ChangeDateTime' //datetime
'ChangeBy' //varchar
using System;
using System.Data;
using System.Data.SqlClient;
using Microsoft.SqlServer.Server;
public partial class Triggers
{
//A Generic Trigger for Insert, Update and Delete Actions on any Table
[Microsoft.SqlServer.Server.SqlTrigger(Name = "AuditTrigger", Event = "FOR INSERT, UPDATE, DELETE")]
public static void AuditTrigger()
{
SqlTriggerContext tcontext = SqlContext.TriggerContext; //Trigger Context
string TName; //Where we store the Altered Table's Name
string User; //Where we will store the Database Username
DataRow iRow; //DataRow to hold the inserted values
DataRow dRow; //DataRow to how the deleted/overwritten values
DataRow aRow; //Audit DataRow to build our Audit entry with
string PKString; //Will temporarily store the Primary Key Column Names and Values here
using (SqlConnection conn = new SqlConnection("context connection=true"))//Our Connection
{
conn.Open();//Open the Connection
//Build the AuditAdapter and Mathcing Table
SqlDataAdapter AuditAdapter = new SqlDataAdapter("SELECT * FROM Audit WHERE 1=0", conn);
DataTable AuditTable = new DataTable();
AuditAdapter.FillSchema(AuditTable, SchemaType.Source);
SqlCommandBuilder AuditCommandBuilder = new SqlCommandBuilder(AuditAdapter);//Populates the Insert command for us
//Get the inserted values
SqlDataAdapter Loader = new SqlDataAdapter("SELECT * from INSERTED", conn);
DataTable inserted = new DataTable();
Loader.Fill(inserted);
//Get the deleted and/or overwritten values
Loader.SelectCommand.CommandText = "SELECT * from DELETED";
DataTable deleted = new DataTable();
Loader.Fill(deleted);
//Retrieve the Name of the Table that currently has a lock from the executing command(i.e. the one that caused this trigger to fire)
SqlCommand cmd = new SqlCommand("SELECT object_name(resource_associated_entity_id) FROM
ys.dm_tran_locks WHERE request_session_id = @@spid and resource_type = 'OBJECT'", conn);
TName = cmd.ExecuteScalar().ToString();
//Retrieve the UserName of the current Database User
SqlCommand curUserCommand = new SqlCommand("SELECT system_user", conn);
User = curUserCommand.ExecuteScalar().ToString();
//Adapted the following command from a T-SQL audit trigger by Nigel Rivett
//http://www.nigelrivett.net/AuditTrailTrigger.html
SqlDataAdapter PKTableAdapter = new SqlDataAdapter(@"SELECT c.COLUMN_NAME
from INFORMATION_SCHEMA.TABLE_CONSTRAINTS pk ,
INFORMATION_SCHEMA.KEY_COLUMN_USAGE c
where pk.TABLE_NAME = '" + TName + @"'
and CONSTRAINT_TYPE = 'PRIMARY KEY'
and c.TABLE_NAME = pk.TABLE_NAME
and c.CONSTRAINT_NAME = pk.CONSTRAINT_NAME", conn);
DataTable PKTable = new DataTable();
PKTableAdapter.Fill(PKTable);
switch (tcontext.TriggerAction)//Switch on the Action occuring on the Table
{
case TriggerAction.Update:
iRow = inserted.Rows[0];//Get the inserted values in row form
dRow = deleted.Rows[0];//Get the overwritten values in row form
PKString = PKStringBuilder(PKTable, iRow);//the the Primary Keys and There values as a string
foreach (DataColumn column in inserted.Columns)//Walk through all possible Table Columns
{
if (!iRow[column.Ordinal].Equals(dRow[column.Ordinal]))//If value changed
{
//Build an Audit Entry
aRow = AuditTable.NewRow();
aRow["ActionType"] = "U";//U for Update
aRow["TableName"] = TName;
aRow["PK"] = PKString;
aRow["FieldName"] = column.ColumnName;
aRow["OldValue"] = dRow[column.Ordinal].ToString();
aRow["NewValue"] = iRow[column.Ordinal].ToString();
aRow["ChangeDateTime"] = DateTime.Now.ToString();
aRow["ChangedBy"] = User;
AuditTable.Rows.InsertAt(aRow, 0);//Insert the entry
}
}
break;
case TriggerAction.Insert:
iRow = inserted.Rows[0];
PKString = PKStringBuilder(PKTable, iRow);
foreach (DataColumn column in inserted.Columns)
{
//Build an Audit Entry
aRow = AuditTable.NewRow();
aRow["ActionType"] = "I";//I for Insert
aRow["TableName"] = TName;
aRow["PK"] = PKString;
aRow["FieldName"] = column.ColumnName;
aRow["OldValue"] = null;
aRow["NewValue"] = iRow[column.Ordinal].ToString();
aRow["ChangeDateTime"] = DateTime.Now.ToString();
aRow["ChangedBy"] = User;
AuditTable.Rows.InsertAt(aRow, 0);//Insert the Entry
}
break;
case TriggerAction.Delete:
dRow = deleted.Rows[0];
PKString = PKStringBuilder(PKTable, dRow);
foreach (DataColumn column in inserted.Columns)
{
//Build and Audit Entry
aRow = AuditTable.NewRow();
aRow["ActionType"] = "D";//D for Delete
aRow["TableName"] = TName;
aRow["PK"] = PKString;
aRow["FieldName"] = column.ColumnName;
aRow["OldValue"] = dRow[column.Ordinal].ToString();
aRow["NewValue"] = null;
aRow["ChangeDateTime"] = DateTime.Now.ToString();
aRow["ChangedBy"] = User;
AuditTable.Rows.InsertAt(aRow, 0);//Insert the Entry
}
break;
default:
//Do Nothing
break;
}
AuditAdapter.Update(AuditTable);//Write all Audit Entries back to AuditTable
conn.Close(); //Close the Connection
}
}
//Helper function that takes a Table of the Primary Key Column Names and the modified rows Values
//and builds a string of the form "<PKColumn1Name=Value1>,PKColumn2Name=Value2>,......"
public static string PKStringBuilder(DataTable primaryKeysTable, DataRow valuesDataRow)
{
string temp = String.Empty;
foreach (DataRow kColumn in primaryKeysTable.Rows)//for all Primary Keys of the Table that is being changed
{
temp = String.Concat(temp, String.Concat("<", kColumn[0].ToString(), "=", valuesDataRow[kColumn[0].ToString)].ToString(), ">,"));
}
return temp;
}
}
The trick was getting the Table Name and the Primary Key Columns.
I hope this code is found useful.
Comments and Suggestion will be much appreciated.
Trigger - Require Help For Updating A Trigger Following An INSERT On Another Table
Oct 30, 2007Table 1
First_Name
Middle_Name
Surname
John
Ian
Lennon
Mike
Buffalo
Tyson
Tom
Finney
Jones
Table 2
ID
F
M
S
DOB
1
Athony
Harold
Wilson
24/4/67
2
Margaret
Betty
Thathcer
1/1/1808
3
John
Ian
Lennon
2/2/1979
4
Mike
Buffalo
Tyson
3/4/04
5
Tom
Finney
Jones
1/1/2000
I want to be able to create a trigger that updates table 2 when a row is inserted into table 1. However I€™m not sure how to increment the ID in table 2 or to update only the row that has been inserted.
Trigger - Require Help For Updating A Trigger Following An INSERT On Another Table
Feb 5, 2008A
ID
Name
1
Joe
2
Fred
3
Ian
4
Bill
B
ID
1
4
I want to be able to create a trigger so that when a row is inserted into table A by a specific user then the ID will appear in table B. Is it possible to find out the login id of the user inserting a row?
I believe the trigger should look something like this:
create trigger test_trigger
on a
for insert
as
insert into b(ID)
select i.id
from inserted i
where
--specific USER
How To Create New CLR Trigger From Existing T-Sql Trigger
Mar 18, 2008how to create new CLR trigger from existing T-Sql Trigger Thanks in advance
View 3 Replies View RelatedModifing The Row That Invokes A Trigger From Within That Trigger
Jul 23, 2005When a row gets modified and it invokes a trigger, we would like to beable to update the row that was modified inside the trigger. This is(basically) how we are doing it now:CREATE TRIGGER trTBL ON TBLFOR UPDATE, INSERT, DELETEasupdate TBLset fld = 'value'from inserted, TBLwhere inserted.id= TBL.id....This work fine but it seems like it could be optimized. Clearly we arehaving to scan the entire table again to update the row. But shouldn'tthe trigger already know which row invoked it. Do we have to scan thetable again for this row or is their some syntax that allows us toupdate the row that invoked the trigger. If not, why. It seems likethis would be a fairly common task. Thanks.
View 4 Replies View RelatedDisabilitazione Trigger [DISABLE TRIGGER]
Jul 20, 2005Salve, non riesco a disabilitare un trigger su sqlserver nč da queryanalyzer, nč da enterprise manager.In pratica tal cosa riuscivo a farla in Oracle con TOAD, mentre qui nonriesco.Mi interessa disattivarlo senza cancellarlo per poi riattivarlo al bisognosenza rilanciare lo script di creazione.Grazie a tuttiHi I need to disable a DB trigger and I'm not able to do this neither withquery analyzer, neither with enterprise manager.I remeber this job was quite simple using TOAd in Oracle.I'm interested in making it disabled not delete it, without run creationscript.Thanks a lot to everybody.
View 4 Replies View RelatedUpdate Trigger Behaviour W/o A Trigger.
May 30, 2008Hi,
I am not sure if this is the right forum to post this question.
I run an update statement like "Update mytable set status='S' " on the SQL 2005 management Studio.
When I run "select * from mytable" for a few seconds all status = "S". After a few seconds all status turn to "H".
This is a behaviour when you have an update trigger for the table. But I don't see any triggers under this table.
What else would cause the database automatically change my update?
Could there be any other place I should look for an update trigger on this table?
Thanks,
Drop Trigger With A Variable Trigger Name
Sep 20, 2007
Hi all in .net I've created an application that allows creation of triggers, i also want to allow the deletion of triggers.
The trigger name is kept in a table, and apon deleting the record i want to use the field name to delete the trigger
I have the following Trigger
the error is at
DROP TRIGGER @DeleteTrigger
I'm guessing it dosen't like the trigger name being a variable instead of a static name
how do i get around this?
thanks in advance
-- ================================================
-- Template generated from Template Explorer using:
-- Create Trigger (New Menu).SQL
--
-- Use the Specify Values for Template Parameters
-- command (Ctrl-Shift-M) to fill in the parameter
-- values below.
--
-- See additional Create Trigger templates for more
-- examples of different Trigger statements.
--
-- This block of comments will not be included in
-- the definition of the function.
-- ================================================
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
-- =============================================
-- Author: <Author,,Name>
-- Create date: <Create Date,,>
-- Description: <Description,,>
-- =============================================
CREATE TRIGGER RemoveTriggers
ON tblTriggers
AFTER DELETE
AS
BEGIN
-- SET NOCOUNT ON added to prevent extra result sets from
-- interfering with SELECT statements.
SET NOCOUNT ON;
Declare @DeleteTrigger as nvarchar(max)
select @DeleteTrigger = TableName FROM DELETED
IF OBJECT_ID (@DeleteTrigger,'TR') IS NOT NULL
DROP TRIGGER @DeleteTrigger
GO
END
GO
Trigger Doesn't Log Into The Audit Table If The Column Of Table Has Trigger On Is Null
Jan 23, 2008
Hi,
I have a trigger set on TABLE1 so that any update to this column should set off trigger to write to the AUDIT log table, it works fine otherwise but not the very first time when table1 has null in the column. if i comment out
and i.req_fname <> d.req_fname from the where clause then it works fine the first time too. Seems like null value of the column is messing things up
Any thoughts?
Here is my t-sql
Insert into dbo.AUDIT (audit_req, audit_new_value, audit_field, audit_user)
select i.req_guid, i.req_fname, 'req_fname', IsNull(i.req_last_update_user,@default_user) as username from inserted i, deleted d
where i.req_guid = d.req_guid
and i.req_fname <> d.req_fname
Thanks,
leo