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For loops in SQL

For loops in SQL

For loops in SQL

(OP)
I want to iterate through a list of key values and run SQL in each iteration based on that value but im not sure how to use the for loop in SQL. Something like this:

declare @test numeric(9)
for @test in (134424,134423,134425)
select count(*) from test_table where test_id=@test
next

RE: For loops in SQL

Are you using Microsoft SQL Server?  The real fun there is that it doesn't support for loops; you need to duplicate the operation of a for loop using a cursor.  Before I post an example of cursor use I'll wait to find out if you're using SQL Server, though :D

RE: For loops in SQL

(OP)
Nope, we're using Sybase. I dont know if your solution would be applicable to Sybase but im sure it has cursors too.

RE: For loops in SQL

In vague hopes of helping you out, I'll post a framework for using a cursor as I would in SQL Server.  My suggestion is to research cursors in Sybase and go from there, but hopefully this will get you going in the right direction:

CODE

#dir is a temporary table, basically the syntax is DECLARE variable CURSOR FOR select statement
DECLARE reader CURSOR FOR SELECT fname FROM #dir
OPEN reader
FETCH NEXT FROM reader INTO @fetcher
WHILE @@FETCH_STATUS=0
BEGIN
    ...Do whatever you want in the loop!...
FETCH NEXT FROM reader INTO @fetcher
END
Basically it uses a select statement that returns one column , I know it's possible to use multiple columns but it gets pretty complicated.  Inside the loop I've shown above, the @fetcher variable holds the data in the field returned by the select statement.  Hope this sheds some light, I will continue to answer questions if I can, good luck!

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