Question

I am using SQL Server 2000

Table1

ID  Date

001 23/02/2009
001 24/02/2009
002 25/02/2009
....

Table2

ID  Date

001 23/02/2009
002 25/02/2009

Query Like

Delete from table1 where table1.id = table2.id and table1.date = table2.date

How to make a Query for the above condition

Answer 1

delete table1
from table2
where table1.id = table2.id and 
      table1.date = table2.date

delete table1 makes table1 the target for deletion. You could write delete from table1 but from is optional.

from table2 specifies the source for deletion. To use a “second” from clause is a t-sql extension that is used to match corresponding rows.

Finally the where clause joins the tables on columns id and date causing the matching rows in table1 to be deleted.

where table1.id = table2.id and 
      table1.date = table2.date