SELECT Table2.Id ; FROM Table2 ; LEFT JOIN Table1 on ( Table1.Id = Table2.Id ) ; WHERE ( Table1.Id is null)functions the same as this?
SELECT Table2.Id ; FROM Table1, Table2 ; WHERE Table1.Id = Table2.Id .AND. ; ( Table1.Id is null) &&& and, if Yes, then are the ()'s needed in this line?Or will LEFT INNER JOIN ON be faster than just a WHERE?
>select Table2.Id ; > from Table2 ; > left join Table1 on ( Table1.Id = Table2.Id ) ; > where ( Table1.Id is null) >>
>>CLOSE ALL >>USE >>USE table2 >>INDEX on id TO id2 >> >>SELECT 2 >>USE table1 >>INDEX on id TO id1 >> >>SELECT 1 >>SET RELATION TO id INTO table2 >>SET FILTER TO table2.id == " " && or == "" >>SELECT 2 >>DELETE ALL >>SET FILTER TO >>SET FILTER TO DELETED() >>BROWSE && for instance >>>>
>>SELECT * ; >>FROM table1, table2 ; >>WHERE table1.id <> table3.id >>>>