April 17, 2007 at 3:35 pm
I need to place the record count of a table in a numeric variable. The problem is the the table name is in a variable also.
declare @records int, @tablename varchar(50)
set @records = (select count(*) from @tablename) doesn't work.
I've tried every combination of set, select, execute, & string commands I can think of and nothing has worked so far.
Suggestions, please!
April 17, 2007 at 3:52 pm
Well, the piece that's causing you problems here is your table name. You cannot use a variable in the FROM clause of a DML statement. So your existing syntax would work fine if the table name were static. If you must store your table name in a variable, you'll be forced to use dynamic SQL in the form of EXEC('sql select string here') or sp_executeSQL 'sql select string here'. The problem you now have is that you cannot assign the results of either one of these methods into a variable. I would suggest making a stored procedure where you will execute the dynamic sql and have the procedure return the row count into a variable in the form of:
EXEC @Records = proc_Call_Your_StoredProcedure @TableName
April 17, 2007 at 3:52 pm
declare @records int, @tablename varchar(50), @sql nvarchar(4000)
SET @sql = 'SELECT @rec = count(*) from dbo.[' + @tablename + ']'
exec sp_executesql @sql, N'@rec int OUTPUT', @rec = @records OUTPUT
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Code for TallyGenerator
April 17, 2007 at 5:55 pm
Thanks Sergiy......that worked just great!
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