Best Practice For Retrieving Last Record
Apr 1, 2006
Hi there, very sorry if this is the wrong forum to post this in.
I want to know what is the BEST practice, the correct Microsoft way of doing this:
basically, lets say I am inserting a new record into SQL. simple customer record:
firstname
lastname
address
city
postcode
password
dateOfRegistration (SQL has this value and the default value is the getdate())
That's all very well. I want to know how I can get the recordID for this and return that back from the caller (returning is easily done) -
You cannot really after this insertion, perform a SELECT statement to get the LAST record entered, as there maybe several records that could all be inserted at the same time by coincidence. It's not the best way of going about this.
I want to know what is the best way of getting the just inserted record's recordID - I was thinking about using date and time, manually inputting them and then using that to retrieve the last record/current inserting record but again its not the best way of going about doing this.
what is the best way?
Many thanks for your help!
View 12 Replies
ADVERTISEMENT
May 11, 2007
hi all,
I have a table productprice which has the following feildsid price datecreated productname 1 12.00 13/05/2007 a1 2 23.00 14/05/2007 a13 24.00 15/05/2007 a14 56.00 13/05/2007 b15 34.00 18/05/2007 b16 23.00 21/05/2007 b17 11.00 12/02/2007 c1 8 78.00 12/03/2007 c2I
need to select the rows that are highlighted here.. ie the row that has
the max(datecreated) for all the productname in the table..
plz help thanks in advance..
View 3 Replies
View Related
Jul 20, 2005
Hi,In the datawarehouse DB (under MS commerce server 2002) a table storesthe referer domain name. Table structure is likerefererdomainid <binary>,domainInternalFlag<0/1>,refererDomainName<varchar>e.g.<binary>|0|unknown<binary>|1|google.com<binary>|1|yahoo.com<binary>|1|google.com<binary>|1|google.com<binary>|1|google.com<binary>|1|altavista.commy problem is to build a query (using this table only) whichrefererDomainName has the max occurrence and how many times. As in thetable above it is google.com and 4 times.Can anyone help me.Thanks in advance.
View 1 Replies
View Related
Apr 7, 2008
The following select retrieves multiple reoords for each i.number. How can I select just the first record for each i.number?
SELECT i.number, i.desc, i.it_sdate, v.entry_date FROM itemsnum as I INNER JOIN Inventor as V ON SUBSTR(i.number,1,5)=v.catalog WHERE v.entry_date<ctod("04/01/06") AND i.it_sdate < ctod("04/01/06") order by number, it_sdate desc
Thanks in advance!
View 5 Replies
View Related
Jan 5, 2014
I have a date/time value (dd/MM/yyyy HH:mm:ss) stored in a field as part of each record in a dataset.
I would like to achieve the following via a single T-SQL query if possible (efficiency is not an issue as the dataset is small)
On query run;
Check if any records in the dataset are within 10 minutes + or - of the current system time (using the date/time value referenced above)
if none
Load the first record
View 6 Replies
View Related
Mar 5, 2007
if I create an index for a table with some records, do you think I can retrieve records in a giving range? for example, the 5th to 10th records?Possible? How can I do it?When we insert data at the table, would the index in sequential order? How would the index be created for new inserted records?I'm using SQL 2005 Express, not SQL 2000.
View 14 Replies
View Related
Sep 26, 2007
I have some VB.NET code to retrieve data from an SQL Server database and display it. The code is as follows: -------------------------------------------------------------------------------------------------------
sw_calendar = calendarAdapter.GetEventByID(cid)
If sw_calendar.Rows.Count > 0 Then
lblStartDateText.Text = sw_calendar(0).eventStartDate
lblEndDateText.Text = sw_calendar(0).eventEndDate
lblTitleText.Text = sw_calendar(0).title
lblLocationText.Text = sw_calendar(0).location
lblDescriptionText.Text = sw_calendar(0).description
Else
lblStartDateText.Text = "*** Not Found ***"
lblEndDateText.Text = "*** Not Found ***"
lblTitleText.Text = "*** Not Found ***"
lblLocationText.Text = "*** Not Found ***"
lblDescriptionText.Text = "*** Not Found ***"
End If
-------------------------------------------------------------------------------------------------------
If all of the fields in the database has values, everything works ok. However, if the title, location or description fields have a null value, I receive the following error message:
Unable to cast object of type 'System.DBNull' to type 'System.String'.
I've tried a bunch of different things such as:
Adding ".ToString" to the database field,
Seeing if the value is null: If sw_calendar(0).description = system.DBnull.value...
...but either I get syntax errors in the code, or if the syntax is ok, I still get the above error message.
Can anyone help me with the code required to trap the null within the code example I've provided? I'm sure there are other, and better, ways to code this, but for now I'd really like to get it working as is, and then optimize the code once the application is working (...can you tell I have a tight deadline )
Thanks,
Brad
View 6 Replies
View Related
May 18, 2008
I am having trouble returning the correct record with my stored procedure.
my problem is that i don't know how to structure the sql statement to do the following:
given a set of records that have the same loankey, i need to
1. find the record that has most recent date (lockExprDt)
2. for all records with that date, find the highest Lock Number (LockNo)
3. for the all the records with that date and that LockNo, find the highest extension number (Ext)
currently my sql statement returns a record that has the most recent date. i don't now how to write the sql to further define my query to return the record that has the most recent date with highest lock number, and finally the highest extension number.
any suggestions as to what i am doing wrong. below is my slq statement. please note that i need to add the sql that will query for the max LockNo, and max Ext. Any help is greatly appreciated. thx!
select a.loankey, a.lockrate, a.investor, a.price, a.ext, a.cost, a.lockno, a.lockstatus , CASE WHEN CONVERT(CHAR(8),a.lockdate,10)='12:00:00 AM' THEN NULL ELSE CONVERT(CHAR(8),a.lockdate,10) END as 'LockDate' , CASE WHEN CONVERT(CHAR(8),b.lockExprDt,10)='12:00:00 AM' THEN NULL ELSE CONVERT(CHAR(8),b.lockExprDt,10) END as 'LockExprDt' , Case WHEN CONVERT(CHAR(8),b.lockExprDt,10)>= CONVERT(CHAR(8),GETDATE(),10) THEN datediff(day, CONVERT(CHAR(8),GETDATE(),10), CONVERT(CHAR(8),b.lockExprDt,10)) ELSE NULL END as 'Days'
from cfcdb..locktable ainner join (select loankey, max(lockExprDt) as lockExprDtfrom cfcdb..locktablegroup by loankey) bON a.loankey = b.loankey AND a.lockExprDt = b.lockExprDt
where a.loankey = @LoanKey
View 6 Replies
View Related
Jun 2, 2004
Hello, everyone:
Does any one know the good T-SQL practice topic web site? It is better to include solutions. Thanks a lot.
ZYT
View 2 Replies
View Related
Sep 3, 2006
When setting up databases for end users, what's the best practice regarding who's the dbo for each individual database - the user itself or a sysadmin?
Does it really have any importance at all who the owner (as defined by 'dbo') is ?
View 5 Replies
View Related
May 7, 2007
(Terms)
TermID, Term
1----- Abc
2----- Arcico
3----- Tunic
and
(RelatedTerms)
TermID, RelatedTermID
1 ------ 3
1------ 2
2------ 4
I want to get the following results
1.- a list of all the terms that start with A%
2.- a list of all the related terms … that belong to terms that start with A%
For number 1 - I am doing a select on Terms table with where term like A%.
For number 2 – I am joining both tables and then once again doing a where term like A%.
Would it be more efficient to take the first results and put them in a table variable, and then just do a join with the second table RelatedTerms.TermID = Terms .TermID
The number of records that generally comeback are between 500 to 1000 records that
What would you consider is a better approach ? or maybe there is an even better way ?
View 4 Replies
View Related
Aug 14, 2007
Wasn't sure where to ask this question.
Was wondering what everyone is doing in regards to server/db protection?
Do you run your DB's on independent servers?
Do you run your DB's on clustered servers?
Do you run your DB's on redundant haardware w/ a 3rd party
application for bit-to-bit data replication?
Is anyone placing the DB's on a SAN's?
We're at a crossroads, and looking for a good direction to ensure the DB's are up.
Any insight welcome.
Thanks,
Kerry
View 3 Replies
View Related
Dec 11, 2007
hello
i'm a newbie for sql , but i want to learn sql on my own , is there any way that i can learn sql , do i have to download sample database from the internet, do i need to have my own server to play with. Hopefully someone show some lights on this.
regards
sutha
View 2 Replies
View Related
Apr 10, 2006
Please point me to a web resource from where I can study:1) writing complex queries such as those involving HAVING, mult-levelnested queries, GROUP BY, T-SQL functions2) Joins - a lot of practice3) Stored Procedures, transactions, cursors and triggers - I need someheavy-duty practiceWhere can I get some good practice of the above? Also, please recommenda good SQL Server/T-SQL book in the light of the above requirement.
View 3 Replies
View Related
Jan 11, 2006
Folks - had a look around Google and no surprises, but never found what i was looking for.
I want to see a real work best practice C# Stored Procedure for Sql 2005 (express is what i am using, but don't mind the Sql edition).
Almost everything i see is a "select * from table" which to be honest was my first stored proc many years ago - everything since has been fairly detailed.
I ask as i am sceptical, after years of trying to STOP building Sql queries in code (as it's hellish!) that the CLR technique really makes any kind of a diffence.
If someone has found that it HAS i'd love to hear about it. The thought of:
SqlCommand cmd = new SqlCommand ( "My Whole Stored Proc as Text" );
... doesn't appeal, never mind the potential for debugging syntactical issues and so on.
I was excited by this, until it became something i had to do in a real situation and then i got a little worried. Should i be?
View 7 Replies
View Related
Nov 2, 2006
create a table and name it Salary Information. Add an Employee Name and Salary column to the table. Create a column in the Employee table and name it Salary. Create a trigger that updates the Salary table with the employees's name and salary each time u insert data into the Salary column of the Employee table.
I tried but it didnt work!
Pls, help me!
View 4 Replies
View Related
Mar 12, 2008
Hi, my database is growing over 1Gb, and I only have one .mdf to keep them all. Should I use a secondary data file for my data? Can I do that now? Thanks.
View 5 Replies
View Related
Jul 20, 2005
I have a client who needs to copy an existing sale. The problem isthe Sale is made up of three tables: Sale, SaleEquipment, SaleParts.Each sale can have multiple pieces of equipment with correspondingparts, or parts without equipment. My problem in copying is when I goto copy the parts, how do I get the NEW sale equipment ids updatedcorrectly on their corresponding parts?I can provide more information if necessary.Thank you!!Maria
View 6 Replies
View Related
Sep 1, 2006
Hi
I have a table with a user column and other columns. User column id the primary key.
I want to create a copy of the record where the user="user1" and insert that copy in the same table in a new created record. But I want the new record to have a value of "user2" in the user column instead of "user1" since it's a primary key
Thanks.
View 6 Replies
View Related
Apr 6, 2007
Hey all!
Sorry for the less then descriptive post title but I didn't find a better way to describe it. I'm developing an app in the express editions of VB and SQLserver. The application is a task/resource scheduler. The main form will have a datepicker or weekly overview and show all tasks scheduled per day. The problem is, I've got one or more people assigned to tasks and I wonder what's the best way to design this. Personally, I'd go for one Task table, a People table and a table that provides a link between them (several record per task, one for each person assigned linking TaskID and PplID). However, I don't see a nice way of showing this data to the end user, allowing him to edit/add etc on ONE screen.
To fix that the only way I see is just add columns to the Task table for every person with select boxes. This way everything can be done on one simple screen. This obviously does present some future issues.
On top of this, which people are available on a day varies and there should be an option to allow a user to set who is available on a specific day. Which would lead me to my first idea and add another table that would provide this. but then I'm having design issues again for the form.
I'm kinda stuck atm, can anyone shed some light on this. I'm sure there is an elegant way of doing this but I'm failing at finding it.
Thanks in advance,
Johan
View 5 Replies
View Related
Apr 7, 2008
Hi,
We're running a Sage CRM install with a SQL Server 2000 database at the back end. We're using the Sage web services API for updating data and a JDBC connection to retrieve data as it's so much quicker.
If I retrieve a record using the JDBC connection and then try and update the same record through the web services, the query times out as if the record is locked for updates. Has anyone experienced anything similar or know what I'm doing wrong? If I just use DriverManager.getConnection() to establish the connection instead of the datasource, and then continue with the same code I don't get these record locking problems. Please find more details below.
Thanks,
Sarah
The JDBC provider for the datasource is a WebSphere embedded ConnectJDBC for SQL Server DataSource, using an implementation type of 'connection pool datasource'. We are using a container managed J2C authentication alias for logging on.
This is running on a Websphere Application Server v6.1.
Code snippet - getting the record thru JDBC:
DataSource wsDataSource = serviceLocator.getDataSource("jdbc/dsSQLServer");
Connection wsCon = wsDataSource.getConnection();
// wsCon.setAutoCommit(false); //have tried with and without this flag - same results
Statements stmt = wsCon.createStatement();
String sql = "SELECT * FROM Person where personID = 12345";
ResultSet rs = stmt.executeQuery(sql);
if(rs.next()){
System.out.println(rs.getString("lastName"));
}
if (rs != null){
rs.close();
}
if (stmt != null) {
stmt.close();
}
if (wsCon != null) {
wsCon.close();
}
View 1 Replies
View Related
Feb 26, 2008
I am attempting to create a multi-record file (as described in my last thread) and have found the following set of instructions very helpful:
http://vsteamsystemcentral.com/cs21/blogs/steve_fibich/archive/2007/09/25/multi-record-formated-flat-file-with-ssis.aspx
I have been able to create a sample file with two of my record types.
I now need to build on this further, because I have 9 record types in total that need to be extracted to a single flat file.
does anyone have any ideas how I might extend the example above to include more record types or know of another means of achieving this?
Thanks in advance for any help you might be able to provide.
View 3 Replies
View Related
Jan 24, 2007
Good Morning,
I work for a company that has sees alot of people come and go. The one thing I have noticed is that people use their admin accounts to log into SQL and create sp, views and databases.When the user leaves I am stuck with all these objects that are owned by somone no longer working for the company.
So my question to you guys is: What is the best practice to use in creating new objects?
Thanks for your guru-ness!
View 3 Replies
View Related
Jul 24, 2007
say i have a customer.aspx that allows a user to enter in customer data.
on customer.aspx, i have dropdownSalesRep which allows the user to associate a sales rep with the customerbut some customers come to directly, and not thru a sales rep, so I want the user to be able to specify "none"
Is it best to have a dummy record in my SalesReps table called "none" with an ID of say "999", or is there some other better way to deal with this?
View 5 Replies
View Related
Aug 7, 2007
Hi.
We have developed as quite simple ASP.Net webpage that fetches a number of information from a SQL 2005 database. We are having some problems though, becuase of a firewall that is beetween the webserver and the SQL server, and I think this is because of bad code from my part. I'm not that experiensed yet, so I'm sure that there is much to learn.
Usualy when I do a query against a SQL database, I do something like this:
Function GO_FormatRecordBy(ByVal intRecordBy As Integer) Dim dbQueryString As String Dim dbCommand As OleDbCommand Dim dbQueryResult As OleDbDataReader dbQueryString = "SELECT Name FROM tblRegistrators WHERE tblRegistratorsID = '" & intRecordBy & "'" dbCommand = New OleDbCommand(dbQueryString, dbConn) dbConn.Open() dbQueryResult = dbCommand.ExecuteReader(CommandBehavior.CloseConnection) dbQueryResult.Read() dbConn.Close() dbCommand = Nothing Return dbQueryResult("Name") End Function
Now, lets say that I have a DataList that I populate with Integer values, and I want to "resolve" the from another table, then i do a function like the one above. I guess that this means that I open and close quite alot of connections against the database server when I have a large tabel. Is there any better way of doing this? Chould one open a database connection globaly in lets say the ASA fil? Whould that be a better aproch?
When I added the CommandBehavior.CloseConnection to the ExecuteReader statment, I noticed that it was a bit faster, and I think there was fewer connections in the database, so maby there is more to the "closing connections" then I usualy do.
Any tips on this?
Best reagrds,Johan Christensson
View 6 Replies
View Related
Dec 16, 2003
Ok.
I recently started developing a web site for a client using storefront.net and ms sql server.
the db schema of storefront.net has autonumbers as the PKs for the products table (even though the products table contains an additional field for product_number.)
So here's my dilemma if you care to read:
I typically develop local, deploy remote (after testing). I have a local SQL server, and then the remote SQL server.
When I'm developing for this project, I'll insert data such as products to the products table (sometimes several times while i'm working out routines to import data to the products table.) this has the effect of creating a unique ID for each product based upon SQL auto-incrementing INTs.
This StoreFront.net (SF.NET) has another table that is a lookup table. For each part number, it has a corresponding categoryID number.
Now, if i have product_ID 1234, and I set the category ID to say 10 and get it working on my local box, every thing is fine.
Here's where the problem comes in: When I use DTS to transfer the database during remote deployment, each product is inserted into the remote DBs products table and gets a NEW product id. Same with the categories.
This has the effect of breaking the relationships. (SF.NET has no ref integrity nor relationships defined in the db.) let's say my product_id 1234 gets put into the remote copy, it'll get a new product_ID (PK). let's say it's now 5775. now my category ID will also get a new value. so my data is now not related.
I don't know how to handle this situation. The unique IDs generated on my local sql will nearly almost always be different from those generated on the remote db.
How do i handle this situatoin is my question? advice, guys?
View 3 Replies
View Related
Jun 28, 2005
Hi to everyone! I've to create a little auction system that runs on web. Before starting developing, I'll would like to be sure to use the best practice...The main aspect is to avoid conflicts on database updating with bids, i.e. if a user places his bid I've to be absolutely sure that his bid is the highest at the moment of updating database. If not, I have to refuse it...So I ask you: using transaction is the best way for assuring the non-conflicts? And may I have to be careful of some other aspect in ASP.NET pages? Or there's no problem of conflicts at page level?Thank you very much in advance for any suggestion, and If anyone has some other thing to say about possible problem on auctions I'll be glad to hear him!!!! ;-)
View 6 Replies
View Related
Jun 4, 2001
Following works fine in QA
master..xp_cmdshell 'osql -Usa -E -h -w250 -Q"set nocount on exec unallocated" -dTest -oc:est.txt' ,no_output
but does not from within a sp
err -
Server: Msg 170, Level 15, State 1, Procedure test, Line 2
Line 2: Incorrect syntax near 'master'.
Thank you.
Ivan
View 1 Replies
View Related
Aug 20, 2004
I have around 10 databases currently residing on different platforms which make-up for roughly a terrabyte of information. I would like to migrate all of these DBs over so that they are all managed under one instance of SQL server 2K. In my view this streamlines things a lot and reduces costs of licensing/hardware.
However, is managing all of these databases on one clustered instance of SQL 2k the best approach from a performace stand point? Would it be better to seperate each database onto its own machine? I am under the impression that given enough hardware (processors, RAM) using just one instance of SQL 2k enterprise should be enough to perform the mangement of this data. Is this correct? Is there an optimal model?
Money is always a concern but in this case, performance is the main objective. The size of the data managed will be growing significantly so the system should be scalable.
My background is as a developer so I may not have provided enough to give a good answer. Please ask questions if you need more detail. I am looking for suggestions on the best way to handle this.
Specifically I would like to know the preferred architecture as well as any suggested hardware.
Thanks in advance
View 3 Replies
View Related
Dec 11, 2004
I'm building a database that has maybe four unique tables Student,
Advertiser, Employee, maybe Account. Three of the four table (Student,
Advertiser, Employee) have something in common in which they all contain
fields such as emailAddress, password, role, isAccountActive, etc. which
allow them to access their respected data. However, is it best practice to
build a fourth table which contain Account information or should I just
include that information in their respected tables?
My thinking is that if you have a fourth table such as Account then you can
manage all accounts (Student, Advertiser, Employee) from one table, but as
the database gets more in-depth you have to build more and more complex
stored procedure to do simply task such as update, delete, select, etc.
View 11 Replies
View Related
Oct 10, 2005
Hello All ..
This is the scenario I'm having :
-- I'm a beginner so bear the way I'm putting it ... sorry !
* I have a database with tables
- company: CompanyID, CompanyName
- Person: PersonID, PersonName, CompanyID (fk)
- Supplier: SupplierID, SupplierCode, SupplierName, CompanyID (fk)
In the Stored Procedures associated (insertCompany, insertPerson, insertSupplier), I want to check the existance of SupplierID .. which should be the 'Output' ...
There could be different ways to do it like:
1) - In the supplier stored procedure I can read the ID (SELECT) and :
if it exists (I save the existing SupplierID - to 'return' it at the end).
if it doesn't (I insert the Company, the Person and save the new SupplierID - to 'return' it at the end)
------------------------------------
2) - Other way is by doing multiple stored procedures,
. one SP that checks,
. another SP that do inserts
. and a main SP that calls the check SP and gets the values and base the results according to conditions (if - else)
3) it could be done (maybe) using Functions in SQL SERVER...
There should be some reasons why I need to go for one of the methods or another method !
I want to know the best practice for this scenario in terms of performance and other issues - consider a similar big scenario ..... !!!
I'll appreciate your help ...
Thanks in Advance . ! .
View 1 Replies
View Related
Jan 16, 2008
Need the following question addressed, as it keeps coming up in our development meetings and has been creating a divide. Pease voice your opinion.
To keep it simple, we have Table1 which identifies several questions that are revised on a regular basis. One of it's columns is called "Revision Status". Within revision Status, we would like to identify the possible status of a question such as:
New Questions;
Revised;
Resubmit;
Inactive;
Active;
...as well as several more.
I'm of the mind to have these in a seperate table identified with a unique ID... call it StatusTable.
Such as:
1 New Questions;
2 Revised;
3 Resubmit;
4 Inactive;
5 Active;
However others feel, just use the "Revision Status" column and simply use the numbers "WITHOUT" a table or description. The developer documentation will tell the developer which number equals the description. ie the following would be found in the Revision Status column.
1
2
3
4
5
My mind says the above is ilogical. I would rather join and say in my statement:
WHERE StatusTable.Status = 'Inactive'
Where the other way would be
Where [Revision Status] = 4
I hope i'm not being thick-headed.
Please advise.
View 10 Replies
View Related
Jul 20, 2007
I'm looking for advice on the best way to stop stored procedures and CLR assemblies from being
copied from their originally installed server to a different server, for the same company or even copied
to another company.
Are there established ways for achieving this level of protection.
Also, I was hoping that encrypting stored procedures would be a 100% reliable way to stop
malicious copying of the code. But I have read that this is not the case. Any advice in this
area would also be appreciated.
Thanks
Steve
View 4 Replies
View Related
