?
Solved

How to delete first N rows in DB2 ?

Posted on 2004-10-11
5
Medium Priority
?
2,698 Views
Last Modified: 2012-06-21
Hi, I am trying to delete first N rows in a DB2 command,
however I can't/don't want to use:
"DELETE FROM TABLE_NAME WHERE COL_NAME IN (SELECT COL_NAME FROM TABLE_NAME FETCH FIRST 'N' ROWS ONLY)"

I have a dynamic build of the delete statement and I have what I have is a constant delete statement that I can add things before it, in the middle of it or after it but I really don't want to change the base delete.

Thanks,
   AmS.
0
Comment
Question by:ams61
  • 2
3 Comments
 
LVL 15

Expert Comment

by:jdlambert1
ID: 12277816
You didn't explain why you don't want to use a query with a sub-select, so I'm not sure what you're looking for, but one option is to create a bit field with a default of zero, set it to 1 when you want it deleted, then run a DELETE statement with a WHERE clause that limits the deletion to records where the value is 1.
0
 

Author Comment

by:ams61
ID: 12282155
Thanks,
I will explain... I have a constant delete sql statement that I can add parts to its beginning, and\or to its end, I can also add constant statements into the delete statement but it will be very dificult to me to change the original delete statement, especially if I don't know from which table I am going to delete (the delete statement is built dynamicly).
0
 
LVL 15

Accepted Solution

by:
jdlambert1 earned 1000 total points
ID: 12286867
Is
>I have a constant delete sql statement that I can add parts to
just another way of saying that you build the statement dynamically?

If so, I don't see why you couldn't add
   WHERE COL_NAME IN (SELECT COL_NAME FROM TABLE_NAME FETCH FIRST 'N' ROWS ONLY)
as needed.

Also, if you're building the delete statement dynamically, I don't understand what you mean about not being able to "change the original delete statement".
0

Featured Post

Learn to develop an Android App

Want to increase your earning potential in 2018? Pad your resume with app building experience. Learn how with this hands-on course.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

November 2009 Recently, a question came up in the DB2 forum regarding the date format in DB2 UDB for AS/400.  Apparently in UDB LUW (Linux/Unix/Windows), the date format is a system-wide setting, and is not controlled at the session level.  I'm n…
Recursive SQL in UDB/LUW (it really isn't that hard to do) Recursive SQL is most often used to convert columns to rows or rows to columns.  A previous article described the process of converting rows to columns.  This article will build off of th…
SQL Database Recovery Software repairs the MDF & NDF Files, corrupted due to hardware related issues or software related errors. Provides preview of recovered database objects and allows saving in either MSSQL, CSV, HTML or XLS format. Ensures recov…
Watch the video to learn how one can deal with PST file corruption issue with an outstanding Kernel for Outlook PST Repair Tool easily. Using this tool, non-technical users can swiftly perform the repair process to restore their essential data witho…

601 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question