Terima kasih @twoleggedhorse.
Inilah solusinya.
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Pertama kita buat fungsi
CREATE FUNCTION GetAIntFromStoredProc(@parm Nvarchar(50)) RETURNS INTEGER AS BEGIN DECLARE @id INTEGER set @id= (select TOP(1) id From tbl where example@sqldat.com) RETURN @id END -
lalu kita lakukan kueri pemilihan
Select col1, col2, col3, GetAIntFromStoredProc(T.col1) As col4 From Tbl as T Where example@sqldat.com