Hi Sumeet,
This can be easily achieved using graphical calculation view.
Take a left outer join of Table1 with Table2 on A_ID, you'll get below o/p :
Table1.A_ID Table1.Desc1 Table2.A_ID Table2.Desc2
1 ABC 1 ghgh
1 DEF 1 ghgh
2 GHI 2 rerer
2 JKL 2 rerer
3 MNO ? ?
Now take a PROJECTION and apply filter : Table2.A_ID is null
You'll get the below o/p:
Table1.A_ID Table1.Desc1 Table2.A_ID Table2.Desc2
3 MNO ? ?
Now in the final defult PROJECTION take only the required three columns in the O/P :
Table1.A_ID Table1.Desc1 Table2.Desc2
3 MNO ?
Hope this solves your problem.
Regards