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I am trying to use this MySQL query:
SET @a:=0; UPDATE tbl SET sortId=@a:=@a+1 ORDER BY sortId;
Unfortunately I get this error:
“Parameter ‘@a’ must be defined”
Is it possible to batch commands into 1 query like this, or do I need to create a stored procedure for this?
I think you need a stored procedure for any kind of statefullness. Is there a reason you have been reluctant to create one?
Also how are you running this code? Is it in an editor like SQL Server Manager or as a string in a program?