I have a simple query to insert data from one table to another and I am expecting multiple rows to be inserted but I get an error about subquery returned more than 1 value. When I change the is not null to a specific row, it inserts just fine. What do I need to change to make this run properly. TIA
QUERY
GO
INSERT
INTO tbl_client (client_name, client_number)(
SELECT client_name, Client_ID AS Client_Number from CLSQL01.SJDOCS.DOCSADM.CLIENT WHERE Client_ID isnotnull)GO
ERROR
Msg 512, Level 16, State 1, Procedure TR_Client_Insert, Line 3
Subquery returned more than 1 value. This is not permitted when the subquery follows =, !=, <, <= , >, >= or when the subquery is used as an expression.
The statement has been terminated.