Basic PL/SQL script needed

I have taken over management of a data warehouse running on Oracle/Windows. I would like to add some code to the daily load processing scripts that would check that a table has been loaded, that is, has more than 0 records. I have .bat scripts that call SQL scripts. I'd like the SQL scripts to do a record count and if it is zero end with a non-zero return code. I think what I want to use is a PL/SQL block in the SQL script. I've come up with the following basic process. Can someone fill in the correct code to make it work? Thanks.

DECLARE
   recs number := 0;
BEGIN
   SELECT count(*) INTO recs FROM WarehouseTable;    IF recs = 0 THEN

      EXIT FAILURE;
   END IF;
END;
/ Received on Sun Feb 15 2004 - 22:24:08 CET