Union

Hi

I have three tables lets say example Table1, Table2, Table3 and I want to create a view which having definition

CREATE VIEW vSample As

SELECT * FROM Table1 UNION ALL SELECT * FROM Table2 UNION ALL SELECT * FROM Table3

Now my question is, I want to show one more column as TableNo which should show 1 i.e. rows from Table1, 2 for rows from table2 and 3 for table3 when I do Select * from vSample.