Sara Harris <sarah(at)ips(dot)gov(dot)il> writes:
> In MS SQL Server I can do this:
> DECLARE @myvar INT
> SET @myvar = 5
> SELECT *
> FROM somewhere
> WHERE something = @myvar
> How do I do the same in PostgreSQL in sql language?
You don't. You need to use plpgsql if you need declared variables.
In practice, if you're coding in a style that would require local
variables, you're almost certainly going to need plpgsql anyway,
since plain SQL hasn't got any control structures either.
regards, tom lane