I have three tables like
Table1
It's a blank table that have same columns as Table2.
Table2
It contains the actual data that needs to be copied in Table1.
id cola colb colc cold
1 hd dj dj dh
2 hf uy ug se
...
Table3
Before copying data from Table2 to Table1, first I need to verify that if the id is present in Table3 or not. In other words I just want to copy the rows from Table2 to Table1 whose id exist in Table3.
id col1 col2
1 xy zz
2 ys sh
One more thing Table2 & Table3 contains half millions of rows, so query must be feasible.