Seems Unavoidable Multiple Cascade Paths. How To Avoid?
Jul 20, 2005
Hello,
There are three tables:
OS-GroupOFCompanies (Table1)
GoC_GroupOFCompaniesID (PK)
OS-Organization (Table 2)
Org_OrganizationID (PK)
OS-UnitAddress (Table 3)
Unit_UnitAddress (PK)
Scenario:
(1)GoC_GroupOfCompanies has -one to many- relationship with Org_OrganizationID.
(2)GoC_GroupOfCompanies has -one to many- relationship with Unit_UnitAddress.
(3)Org_OrganizationID has -one to many- relationship with Unit_UnitAddress.
Following Error message appeared after trying to save the relationship (3) described above.
'OS-Unit-UnitAddress' table saved successfully
'OS-Organization' table
- Unable to create relationship 'FK_OS-Organization_OS-Unit-UnitAddress'.
ODBC error: [Microsoft][ODBC SQL Server Driver][SQL Server]Introducing FOREIGN KEY constraint 'FK_OS-Organization_OS-Unit-UnitAddress' on table 'OS-Organization' may cause cycles or multiple cascade paths. Specify ON DELETE NO ACTION or ON UPDATE NO ACTION, or modify other FOREIGN KEY constraints.
[Microsoft][ODBC SQL Server Driver][SQL Server]Could not create constraint. See previous errors.
NB: ON UPDATE is much needed.
How to manage the situation?
Please guide.
Thanks
SuryaPrakash
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Sep 11, 2006
Hi there.I've been searching for this error specifically but I haven't found anything yet.I have these two tables (USERS and REQUESTS):USERS ( [LOGIN] [varchar] (10) NOT NULL , [NAME] [varchar] (20) NOT NULL)where LOGIN is the primary key.The problem comes when I try to create the "REQUESTS" table.In these requests there's one user who types the request. After one or two days, there's other user who aproves the request. The problem is that I need two foreign keys referencing the table "USERS".CREATE TABLE REQUESTS ([ID] [numeric](5, 0) NOT NULL ,[DATE] [datetime] NOT NULL ,[NOTES] [varchar] (100) NOT NULL ,[TYPED_BY] [varchar] (10) NOT NULL ,[APROVED BY] [varchar] (10) NULL) ON [PRIMARY]GOALTER TABLE REQUESTS ADD CONSTRAINT [PK__REQUESTS__07DE5BCC] PRIMARY KEY ( [ID]) ON [PRIMARY] GOALTER TABLE REQUESTS ADD CONSTRAINT [FK__REQUESTS__TYP__15702E88] FOREIGN KEY ([TYPED_BY]) REFERENCES [USERS] ([LOGIN]) ON UPDATE CASCADE ,CONSTRAINT [FK__REQUESTS__APR__12742E08] FOREIGN KEY ([APROVED_BY]) REFERENCES [USERS] ([LOGIN]) ON UPDATE CASCADEAnd SQL returns:Introducing FOREIGN KEY constraint 'FK__REQUESTS__APR__12742E08' on table 'REQUESTS' may cause cycles or multiple cascade paths. Specify ON DELETE NO ACTION or ON UPDATE NO ACTION, or modify other FOREIGN KEY constraints.Could not create constraint. See previous errors.Ok, after that, I tried creating a new table to store aprovals (Table with two fields: "REQUEST_ID" and "APROVED_BY").So, I removed "APROVED_BY" field from "REQUESTS" and its FK constraint.The same error comes up.I don't think this structure goes into "cycles" or "multiple cascades".How can I do this?Thanks in advanceRegardsRoland
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Apr 11, 2008
Hi,
I have two tables called a and b. a has one row called aId where aId is the PK. b has bId, aId_1 and aId_2 where bId is the PK and aId_1 and aId_2 both allow nulls.
If I have a relationship between aId and aId_1, and another relationship between aId and aId_2, where I set the delete rule for both to SET_NULL, then I get the error -
"may cause cycles or multiple cascade paths"
But its completely reasonable that I might wish to do this.
The funny thing is that under Visual Studio, I can create a Data Set with these tables and using the designer, I can set the both foreign key relationships to Delete Rule Set Null and everything works as expected.
So, I'm unsure now if I just need to set the Delete rules using the Dataset designer and not bother with them in the database itself.
Any comments?
Thanks,
Barry.
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Apr 18, 2007
Hello all,
Is there documentation somewhere about multiple execution paths in SSIS control flow? I didn't find documentation anywhere. I have a situation where I have two tasks that take considerable time, but could be executed in parallel (to speed up things) and I was wondering whether SSIS supports parallelism.
To illustrate the issues in simultaneous execution, I created a test SSIS package. In the package, I have five tasks, let's call them T1, T2, T3, T4 and T5. The taks are connected with "green arrows" like this:
T1->T2
T1->T3
T2->T4
T3->T4
T5 is not connected. The tasks can be e.g. Send Mail tasks, that's not relevant to this issue. I put a breakpoint in each task and execute the package.
When I execute package, T1 and T5 become active, i.e. the arrow that displays where the package execution currently is, is in two tasks simultaneously. Now F10 (step over) doesn't seem to work "Unable to step. Not implemented". If I press F5 nothing happens. After I press F5 for a second time tasks T1 and T5 and executed. Why don't they execute with the first pressing of F5? I would additionally like to know whether these two tasks are executed in parallel or sequentially, i.e. in the same thread or in two threads? Is there documentation of this?
The execution stops at T2&T3. Again, pressing F5 doesn't do anything, but the second time I press F5 T2 and T3 are executed.
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May 26, 2008
Hi All,
Use Case1:
Just wanted to know if there is something like multiple cascade delete option in SqlServer 2005.
My table structure is similar to what is given below
create table test ( id int PRIMARY KEY, tname nvarchar(55))
create table childTest ( id1 int REFERENCES test(id) on delete cascade,
id2 int REFERENCES test(id) on delete cascade, tname nvarchar(55))......
The above creation fails for childTest since both id1 and id2 reference test with ondelete cascade.
As per Books online: The series of cascading referential actions triggered by a single DELETE or UPDATE must form a tree containing no circular references. No table can appear more than once in the list of all cascading referential actions that result from the DELETE or UPDATE.
Doesn't look like a circular reference here. Wanted to confirm if it is because test is being referenced twice in the childtable.
My requirement is if a row is deleted from test, it should delete matching rows from childTest(id1 and id2). Since delete cascade is not being allowed for both columns , I have to handle the delete in id2.
Use Case2:
Also can I have INSTEAD OF DELETE and Cascade delete on the same table?
I have a cascade delete from table1 to table2. which means when any row from table1 is deleted corresponding rows from table2 are deleted. and on table2 I would like to have an instead of delete where I would like to delete rows from another table say table3.
Thanks & regards
Sunil
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Jun 10, 2004
Hi guys-n-gals...
I have a table that contains the following:
PortfolioID(int), EndDate(smalldatetime), Begdate(smalldatetime), WklyCloseIndex (float)
It has a primary key which is PortfolioID/BegDate/EndDate
I need to create a table that summarizes, by date range, the weeklycloseindex of several portfolios, like this:
BegDate EndDate Portfolio2 Portfolio67 Portfolio11 Portfolio90
05/28/2004 06/04/2004 xx.xx xx.xx xx.xx xx.xx
05/21/2004 05/28/2004 xx.xx xx.xx xx.xx xx.xx
So I wrote a function...
This function results in a table scan *GASP!!!!* (at least that's what the 'splain plan tells me when I run it in SQL Analyzer). Before I made it into the function, when I was testing the code in SQL Analyzer, it resulted NOT in a table scan, but rather a series of nested loops (the joins) and clustered index seeks...resulting in about 1/3 the total cost of the function.
I suspected originally that it was the TOP/ORDER BY that the function insisted upon, but even if I remove those, still get a table scan.
Wassup? Why does the function turn my cool lil' self-join into a table scan? Whut am I missing? Any thoughts? Disgusted Derisions? Hurled Insults? Bring it on!!! (please! ;) )
My predecessor did this in a similar project using a separate cursor for each portfolio by date, then looped through the dates, pulling in the per-portfolio index value and building the output table. I would rather avoid the cursors if I can.
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Is there any way to avoid multiple packages to run concurrently on the same SSIS server ?
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There are 3 tables Property , PropertyExternalReference , PropertyAssesmentValuation which are common for 60 business rule
SELECT Â
 PE.PropertyExternalReferenceValue  [BAReferenceNumber]
, PA.DescriptionCode
  [PSDCode]
, PV.ValuationEffectiveDate
  [EffectiveDate]
, PV.PropertyListAlterationDate
  [ListAlterationDate]
[code]....
Can we push the data for the above query in a physical table and create index to make the query fast rather than using the same set  tables multiple timesÂ
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Hi
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Mar 30, 2006
We have a growing issue where we have a relative dtsconfig file (which stores the absolute base path of the ETL packages). This way we can keep the ETL projects failry portable - only having to modify one value in the dtsconfig file. The master package that defines the dtsconfig location (which is config/Default.dtsconfig) usually interpretates this location to be relative the project. The problem is that every now and again when you open this package in .NETStudio, the path is interpreted differently and causes: config/Default.dtsconfig to state invalid path. But when we delete the variable (which defines the dtsconfig path), save/close and open/recreate it works again. This may or may not be supported MS method, but I was curious to know why this gets messed up. Is there somehwere in the .NET framework that defines what "/" is relatively under?
For example: Our absolute config path is "D:Program FilesMicrosoft SQL Server90DTSPackagesETLProjectETLBaseconfigDefault.dtsconfig" but using: "config/Default.dtsconfig" for xml file value works. However, sometimes we will get an error stating that this file cannot be found, and when we just try to delete (without saving and closing) and immediatelly try to put "config/Default.dtsconfig" again and hit next, we get an error and the path is now:
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Ideas?
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Jan 7, 2008
using System;
using System.Data;
using System.Data.SqlClient;
using System.Data.SqlTypes;
using Microsoft.SqlServer.Server;
using System.Collections;
public partial class UserDefinedFunctions
{ [Microsoft.SqlServer.Server.SqlFunction(FillRowMethodName="Obj_Row",
IsDeterministic=true,IsPrecise=true,
TableDefinition="ObjID int,OjbDataID int,ObjDataValue nvarchar(400)",DataAccess= DataAccessKind.Read)]public static IEnumerable Obj_IDs(SqlInt32 Data_1, SqlInt32 Data_2, SqlInt32 Data_3)
{using (SqlConnection conn = new SqlConnection("context connection=true"))
{
try
{ if (!Data_2.IsNull)
{string sql = @"Select Obj_ID, Obj_Data_ID, Obj_Data_Value from tbl_Obj_2";
SqlCommand cmd = new SqlCommand(sql, conn);SqlDataAdapter da = new SqlDataAdapter(cmd);DataTable dt = new DataTable();
da.Fill(dt);
conn.Open();return dt.Rows;
}if (!Data_3.IsNull)
{string sql = @"Select Obj_ID, Obj_Data_ID, Obj_Data_Value from tbl_Obj_3";
SqlCommand cmd = new SqlCommand(sql, conn);SqlDataAdapter da = new SqlDataAdapter(cmd);DataTable dt = new DataTable();
da.Fill(dt);
conn.Open();return dt.Rows;
}
}catch (Exception ex)
{
ex.Message.ToString();
}
finally
{
conn.Close();
}
}
}public static void Obj_Row(Object item, out int ObjID, out int ObjDataID, out string ObjDataValue)
{DataRow row = (DataRow)item;
ObjID = Convert.ToInt32(row["Obj_ID"]);ObjDataID = Convert.ToInt32(row["Obj_Data_ID"]);ObjDataValue = row["Obj_Data_Value"].ToString();
}
};
//Error 1 'UserDefinedFunctions.Obj_IDs(System.Data.SqlTypes.SqlInt32, System.Data.SqlTypes.SqlInt32, System.Data.SqlTypes.SqlInt32)': not all code paths return a value
I'm newbie. Please, show me how to correct the problem. Thank you.
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May 22, 2007
This has probably been covered in other posts. I have been working with SSIS for the past month and I am trying to follow best practices on various items. Having worked with a different ETL tool prior to this, I am wondering what is the best approach to use for Connections and File Paths.
What I would normally do with DataStage for this would be to assign a Job Variable (and eventually Sequence Variable) of the type: Path. So, if I was developing a job I would create SourceFilePath, ErrorFilePath, etc. I would use these variables in a FlatFile or Dataset Stage. For instance I would assign a filename for a source as: #SourceFilePath#SourceFile1.txt. During execution the job would load the variable and then the filename would be: C:MyDocumentsDatafilesSourceFile1.txt.
When its time to move to another environment, I don't have to worry about changing values for file connections because it is managed dynamically by a config file or whatever method.
What is the best practice that emulates this behaviour for SSIS? I've been thick and can't get my head around this. Any direction to blogs or user sites would be great. Examples, even better!
Thanks in advance.
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May 6, 2007
Hi:
I am trying to set up a TEST ENIVORNMENT for a reservation software package. I need this setup so that I can run various scheduling scenarios in order to optimize operations. Below I have been given instructions from the software vendor on how to set up my SQL database. However, I am a little confused on what to do for a couple of the steps. They are as follows:
***In SQL server 2000 enterprise manager on the test laptop, change the 2 path settings in the table SGCONFIG. The should be changed to C:StratagenAdept5Server. ** YOU WILL NEED TO DO THIS STEP EVERYTIME YOU RESTORE A BACKUP ADEPT5_CLASTRAN.BAK FROM THE PRODUCTION TO THE TEST ENVIRONMENT
QUESTION: How do you change the path settings on a table?
***Open the .udl files in the apps folder and the server apps folder and check to see that they are pointing to the test laptop server, not the production server.
QUESTION: What are the .udl files and how do you check to see if they are pointing at the test laptop server only?
Thanks sincerely for your help. I am trying to meet a deadline for a meeting tomorrow. Therefore, I am desperate. Please send me email. rtanner@clastran.com.
Ron
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May 6, 2007
Hi:
I am trying to set up a TEST ENIVORNMENT for a reservation software package. I need this setup so that I can run various scheduling scenarios in order to optimize operations. Below I have been given instructions from the software vendor on how to set up my SQL database. However, I am a little confused on what to do for a couple of the steps. They are as follows:
***In SQL server 2000 enterprise manager on the test laptop, change the 2 path settings in the table SGCONFIG. The should be changed to C:StratagenAdept5Server. ** YOU WILL NEED TO DO THIS STEP EVERYTIME YOU RESTORE A BACKUP ADEPT5_CLASTRAN.BAK FROM THE PRODUCTION TO THE TEST ENVIRONMENT
QUESTION: How do you change the path settings on a table?
***Open the .udl files in the apps folder and the server apps folder and check to see that they are pointing to the test laptop server, not the production server.
QUESTION: What are the .udl files and how do you check to see if they are pointing at the test laptop server only?
Thanks sincerely for your help. I am trying to meet a deadline for a meeting tomorrow. Therefore, I am desperate. Please send me email. rtanner@clastran.com.
Ron
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What are the SQL 2005 Upgrade Paths? For example, is there a direct in-place upgrade for SQL 6.5? SQL 7.0? Can someone provide a link please? Thanks in advance.
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Mar 17, 2008
I have created over a hundred reports and each of them are scheduled to output a pdf. The problem is this was temporary and each week I would like to output the reports to a directory that is based upon time. For example, I have 13 groups of reports and each group has 9 reports. Each group has it's own directory and folder. IE group A would be saved in something like \client filesgroup aweekly reportsMar 17 2008. The next week the reports for the same group need to be saved in \client filesgroup aweekly reportsMar 24 2008. This would be the same for each of the groups; group A, group B etc.
The question is there a way to set these paths dynamically or at least iterate through the subscriptions and change the paths?
Cheers
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Jun 28, 2006
I have an ActiveX Script Task in SQL Server 2000. It chooses one of two
possible success-paths depending on if a file exist or not. (Part of the old ActiveX Script for choosing next step is below)
I need to rewrite this for a Script Task in SQL Server 2005 but it seems like it
doesn't have this functionality and objects.
Does anyone know how to write the code for choosing the next step in a
Script Task or knows another way to solve my problem?
The package is not suppose to fail if the file is missing, it's must succeed and that's why I need two success-paths.
Regards,
Sara
'**********************************************************************
' Visual Basic ActiveX Script
'************************************************************************
Function Main ()
Dim pkg
Dim stpContinuePkg
Dim stpExit
SET pkg = DTSGlobalVariables.Parent
SET stpContinuePkg = pkg.Steps("DTSStep_DTSActiveScriptTask_4")
SET stpExit = pkg.Steps("DTSStep_DTSActiveScriptTask_21")
If ...... Then
Main = DTSStepScriptResult_ExecuteTask
stpContinuePkg.DisableStep = False
stpExit.DisableStep = True
Else
.......
End If
Main = DTSTaskExecResult_Success
End Function
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Jan 16, 2004
[[Disclaimer: I am by no means a highly-skilled DBA. I have just enough db skills to get my job done, which involves light sql server and oracle tasks. I appreciate the help, guys.]]
I am trying to replace the path section of filenames listed in a collumn of my database. The filenames are UNC paths, and all files have 8 digit filenames with the same extension (they are all tif images). The length of the paths in the filenames will change, however.
Here is what my old paths look like:
\imageimagesNYY-MMABCDEFGH.TIF
..and here is the new path (all of the images are being consolidated into one directory):
\als-imagealscom31imagesdbABCDEFGH.TIF
-------------------------------------------------------------
I have tried using the following query to do this:
update image set filename=replace(filename,'\imageimages5 0-08','\als-imagealscom31imagesdb')
This returns insanely crazy results like 460239 row affected, when it should be about a thousand.
--------------------------------------------
I have also tried the following:
update image set filename=right(filename,12) + '\als-imagealscom31imagesdb' where left(filename,21) = '\imageimages5 0-08'
This affects zero rows.
Please guide me down the one true path. My coworkers are clueless and I'm quickly running out of disk on the old box.
peace,
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Jul 24, 2007
Ive just installed VS2005 Pro and SQL Server Developer edition.
Now I want to set the default paths for project, templates, settings. But I want for both VS and SQL files.
For example, right now the default folders for SQL Studio are:
.My DocumentsSQL Server Management StudioProjects
.My DocumentsSQL Server Management StudioSettings
.My DocumentsSQL Server Management StudioTemplates
.My DocumentsSQL Server Management StudioBackup Files
... and so on.
For VS Studio:
.My DocumentsVisual Studio 2005Projects
.My DocumentsVisual Studio 2005Templates
.My DocumentsVisual Studio 2005Code Snippets
... and so on.
I would like for all sub-folders(from SQL Server and VS) to be in one same folder(Development), for example:
.My DocumentsDevelopmentProjects
.My DocumentsDevelopmentSettings
.My DocumentsDevelopmentTemplates
.My DocumentsDevelopmentBackup Files
.My DocumentsDevelopmentCode Snippets
... and so on.
I have tried changing in each application´s options the default path for each one, pointing to each folder I listed above.
My problem is that both VS and SQL Server still keeps creating folders in the old locations, for example: ".My DocumentsSQL Server Management StudioProjects". This example happens when I create a new query, and try to save it, it automatically creates that folder.
It only works for a few of them, like the settings folder. Ive managed to create a single folder for SQL and VS setting files.
Is there a way I can join both Application folders? I want to keep both projects files in one folder, both setting files in one folder, and so on...
I hope I explained well my situation.
Thanks!
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Apr 10, 2008
Currently I have an sql string which looks like this
INSERT INTO tblPDFFiles (fileType,PDFcontent) SELECT 'First test file', BulkColumn FROM OPENROWSET(Bulk 'C://Test.pdf, SINGLE_BLOB) AS BLOB
But the files i am trying to access is on a different shared server called 'test2008' now im told I can access this doing
INSERT INTO tblPDFFiles (fileType,PDFcontent) SELECT 'First test file', BulkColumn FROM OPENROWSET(Bulk '
\test2008 estpdf.pdf', SINGLE_BLOB) AS BLOB
Which I made sure had the pdf there I get the following error
SSIS package "Package.dtsx" starting.
Error: 0xC002F210 at Execute SQL Task, Execute SQL Task: Executing the query "INSERT INTO tblPDFFiles (fileType,PDFcontent) SELECT 'First test file', BulkColumn FROM OPENROWSET(Bulk '\test2008 est.pdf', SINGLE_BLOB) AS BLOB" failed with the following error: "Cannot bulk load because the file "\test2008 est.pdf" could not be opened. Operating system error code 5(Access is denied.).". Possible failure reasons: Problems with the query, "ResultSet" property not set correctly, parameters not set correctly, or connection not established correctly.
Task failed: Execute SQL Task
Warning: 0x80019002 at Foreach Loop Container: The Execution method succeeded, but the number of errors raised (1) reached the maximum allowed (1); resulting in failure. This occurs when the number of errors reaches the number specified in MaximumErrorCount. Change the MaximumErrorCount or fix the errors.
Warning: 0x80019002 at Package: The Execution method succeeded, but the number of errors raised (1) reached the maximum allowed (1); resulting in failure. This occurs when the number of errors reaches the number specified in MaximumErrorCount. Change the MaximumErrorCount or fix the errors.
SSIS package "Package.dtsx" finished: Failure.
How do I give access to this other server to my SSIS package
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Aug 4, 2015
I'm curious if there's a "best practice" for setting up the data directories MS SQL will use for each operation? I've allocated independent disks for things like C: (OS), E: (DATA), etc etc etc but I'm not familiar w/ MS SQL to understand how DBA's commonly configure the folders under each unique disk for things like DATA, LOGS, BACKUP, INDEXES, and TEMPDB. Should I have an identically name folder as show below in my example?
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Oct 29, 2015
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Oct 1, 2003
Here a code for finding all minimal loops (cyclic paths) in a graph
with vertexes of degree >= 3. Almost obviously that before seeking
for loops we should eliminate from the graph all its vertexes of degree < 3
(degree of a vertex is the number of edges outcoming from the vertex).
Note: there are no any 'parent' - 'child' nodes here. All vertexes are
absolutely equitable.
if object_id('g3')>0 drop table g3
if object_id('g3x')>0 drop table g3x
if object_id('g3y')>0 drop table g3y
if object_id('g3l')>0 drop table g3l
GO
create table g3y(v1 int, v2 int) -- ancillary table
GO
create table g3x(n int, v1 int, v2 int) -- ancillary table
GO
create table g3l(nl int, v1 int, v2 int)
-- table for storing of 'detected' loops
GO
create table g3(v1 int, v2 int)
-- table of test data with pairs of adjoining vertexes
-- each vertex is named by an arbitrary number
GO
insert into g3
select 2, 3 union all
select 2, 4 union all
select 1, 4 union all
select 3, 5 union all
select 5, 6 union all
select 1, 6 union all
select 4, 7 union all
select 6, 8 union all
select 3, 9 union all
select 1, 7 union all
select 2, 7 union all
select 1, 8 union all
select 5, 8 union all
select 2, 9 union all
select 5, 9 ----union all
/*
select 2, 13 union all
select 3, 13 union all
select 13, 14 union all
select 12, 14 union all
select 12, 15 union all
select 11, 15 union all
select 11, 13 union all
select 10, 11 union all
select 10, 12 union all
select 10, 14 union all
select 10, 15
*/
GO
insert into g3 select v2, v1 from g3
declare @i int, @n int, @v1 int, @v2 int
set @i=1
while 0=0
begin
set @n=1
truncate table g3x truncate table g3y
select top 1 @v1=g3.v1, @v2=g3.v2 from g3 left join g3l on
(g3.v1=g3l.v1 and g3.v2=g3l.v2)or(g3.v1=g3l.v2 and g3.v2=g3l.v1)
where g3l.nl is null if @@rowcount=0 break
insert into g3x select @n, @v1, @v2
while @v1<>(select top 1 v2 from g3x order by n desc)
begin
set @n=@n+1
insert into g3x select top 1 @n, v1, v2 from g3 where v2=@v1
and v1<>@v2 and v1=(select top 1 v2 from g3x order by n desc)
if @@rowcount=0
begin
insert into g3x select top 1 @n, v1, v2 from g3 where
v2 not in (select v1 from g3x union all select v2 from g3x) and
v1=(select top 1 v2 from g3x order by n desc) and not exists
(select 0 from g3y where g3y.v1=g3.v1 and g3y.v2=g3.v2)
if @@rowcount=0
if @n>2
begin
insert into g3y select v1, v2 from g3x where n=@n-1
delete from g3x where n=@n-1
set @n=@n-2
end
else
begin insert into g3l select 0, v1, v2 from g3x break end
end
else
begin
insert into g3l select @i, v1, v2 from g3x set @i=@i+1
end
end
end
select * from g3l order by nl
Below is what we get:
nl v1 v2
----------- ----------- -----------
1 2 3
1 3 5
1 5 6
1 6 8
1 8 1
1 1 4
1 4 2
2 1 6
2 6 8
2 8 1
3 4 7
3 7 1
3 1 4
4 3 9
4 9 2
4 2 3
5 2 7
5 7 4
5 4 2
6 5 8
6 8 6
6 6 5
7 5 9
7 9 3
7 3 5
Of course, in general case not all found by the code loops are minimal.
But this is exactly my approach:
firstly find any possible loops (avoiding excessiveness!!),
then, in WHILE loop, try to mark out minimal loop(s) from intersection of
two non-minimal loops... seems it will be an interesting t-sql job.
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I have a  tblActivity table :
ActivityID ActivityName
-----------------------------
1 A1
2 A2
3 A3
4 A4
5 A5
6 A6
7 A7
8 A8
9 A9
10 A10
and related it in tblParentActivity table with parent child relationship as:
ParentActivityID ChildActivityID
-------------------------------------
1 2
1 3
2 4
2 5
3 6
4 7
5 7
6 8
7 9
8 9
9 10
I want to write a SQL query which will make it in tracks depend on how many childActivity in one parentActivity like
ActivityID TrackGroup
-------------------------
1 1
2 1
4 1
7 1
9 1
10 1
[code]....
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Mar 27, 2008
I am trying to send a parameter to an uploaded report, It's default path is:
http://server/Reports/Pages/Report.aspx?ItemPath=%2fNavsion%2fNavision+PO+Report
I tried:
http://server/Reports/Pages/Report.aspx?ItemPath=%2fNavsion%2fNavision+PO+Report&rs:Command=Render&PONo=15818
It did not run and when I manually added the parameter it changed to:
http://server/Reports/Pages/Report.aspx?ItemPath=%2fNavsion%2fNavision+PO+Report&rs%3aCommand=Render&PONo=15818
I also tried to change the properties parameters settings has default unchecked and prompt unchecked
do I need to place the file in a folder on the server instead of uplading it?
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Oct 26, 2015
I have a problem where I need to select all top level file paths from a string value in SQL
So I have a column "Locations"
Example Data:
X:folderanotherfolder
X:folderyet another folder
X:foldernameanother folder
X:foldernameyet another folder
I'd want to return only:
X:folder
X:foldername
I need to somehow parse the sting and capture anything before the second ''?
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Mar 6, 2000
Hi! I'm new to SQL server. I need help.
I have 2 tables:
Table A (A_ID, X) where A_ID is the primary key.
Table B (B_ID, A_ID, Y) where B_ID is the primary key, and A_ID is the foreign key.
I want to change the value of A_ID of Table A, say A1 into A2. How can I automatically change the value of A_ID in Table B if the record exists?
How can I delete a record in Table A and the corresponding record in Table B is deleted automatically?
Thanks in advance!
Chung
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Jul 8, 2006
Does anyone know how to do a cascade update in SQL 2005 using the studio manager?Basically, I have a project table with a status column. If the status is set to 2, then I need to update another table that references the project id.
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Feb 14, 2007
I have a Sql Server 2005 table with 3 fields, an ID field (primary key), a parent ID field, and Name. The parent ID references the ID field (foreign to primary - many to one) within the same table so that records can reference their parent. I would like to place a cascade delete on the ID field so that when the primary ID is removed it will automatically remove all those records with a parent ID that match. Sql server does not allow me to establish this cascade delete.I was considering a trigger instead but only know how tio use the AFTER paramter and not an alternative. Thanks
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Jun 11, 2002
Hi,
We are developing a new oltp application using SQL Server 2000 and are debating whether to use "cascade delets" or not. In earlier apps, we had issues using cascade deletes like someone deleted parent by mistake and all child records got deleted OR SQL Server crashed in middle of cascade delete and records were lost or performance became an issue when there were huge # of child records to be deleted,etc.
Are there any recommendations for/against using Cascade deletes and when to use and when NOT to use cascade deletes ?
Thanks
Satish
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Aug 27, 2006
Hello all,
I am new to SQL and I was hoping someone could explain something to me about 'on update cascade'.
I understand what 'on update cascade' does (i think) - it updates the child table when the parent table is updated.
What i do not understand is that the 'on update cascade' works on the primary key of the parent table, but i was on the understanding that the primary key doesn't change often if at all so why would the 'on update cascade' be of use?
Sorry for my ignorance and i realise i must be missing something simple but would be grateful for any help.
Thanks
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Nov 6, 2006
OK, so now I'm just being lazy, but after seeing a question about this, I wonder which is actually better?
Assuming that you have SPROC only access to your data, which is better/more effeicient.
Having the stored procedure actually do the deletes/updates (which is the way I always do this) or enabling CASCADE DELETE/UPADTE in the database?
Just curious, what do most people do.
Logically to me, the "UPDATE" is actually a logical DELETE and INSERT anyway because it's a new "thing"
Unless of course you buy into surrogates
Brett
8-)
Hint: Want your questions answered fast? Follow the direction in this link
http://weblogs.sqlteam.com/brettk/archive/2005/05/25/5276.aspx
Add yourself!
http://www.frappr.com/sqlteam
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