multiple SQL commands at once

I'm running asp.net 2.0 and acessing MSSQL 2K. I am trying to run a query in which I need to set up variables first. I tried the following group of commands as shown, passing it to the SqlDataReader object, but it failed.. does anyone know how i can pass multiple SQL commands?

MainQuery = "declare @.MinGrades as Table(GradeID Bigint) " & _
" INSERT @.MinGrades SELECT MIN(CreditGrades.SplitID) AS Expr1" & _
" FROM CreditGrades INNER JOIN" & _
" CreditGradeSplits ON CreditGradeSplits.CreditGradeSplitID = CreditGrades.SplitID " & _
" WHERE (CreditGrades.x0x30 = - 1 OR " & _
" CreditGrades.x0x30 >= 0) AND (CreditGrades.x1x30 = - 1 OR " & _
" CreditGrades.x1x30 >= 0) AND (CreditGrades.x2x30 = - 1 OR " & _
" CreditGrades.x2x30 >= 0) AND (CreditGrades.x3x30 = - 1 OR " & _
" CreditGrades.x3xNOD >= 0) " & _
" GROUP BY CreditGradeSplits.CreditGradeGroupID" & _
" Select * from @.MinGrades "Looks good to me. What error are you getting? Please copy/paste the stack trace if possible as well.|||

Looks good to me. What error are you getting? Please copy/paste the stack trace if possible as well.

I suspect you realize that you don't really need to do that query in 3 commands, and can combine them into a single select.