Question

I am trying to update a record in a table which requires me to user INNER JOIN to find proper record.

   SELECT T2.*
   FROM Schema.Table2 T2 INNER JOIN 
     Schema.Table1 T1 ON T2.Key_Column = T1.Key_Column
   WHERE T2.ID = @ID AND T1.Code = '1'

Tried

UPDATE Schema.Table2 T2
SET T2.col1 = @Var1,
    T2.col2 = @Var2,
    T2.col3 = @Var3
WHERE T2.Key_Column = (SELECT T2.*
                       FROM Schema.Table2 T2 INNER JOIN 
                       Schema.Table1 T1 ON T2.Key_Column = T1.Key_Column
                       WHERE T2.ID = @ID AND T1.Code = '1')

Please help!

Answer 1

You don’t need a subselect:

UPDATE T2
SET T2.col1 = @Var1,
    T2.col2 = @Var2,
    T2.col3 = @Var3
FROM Schema.Table2 T2 INNER JOIN 
     Schema.Table1 T1 ON T2.Key_Column = T1.Key_Column
WHERE T2.ID = @ID AND T1.Code = '1'