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CREATE FUNCTION [dbo].[selectByTableBID]
(
@colId int,
@parentcolId int
)
RETURNS TABLE
AS
RETURN(
select * from tableA
union
select * from tableB where colId=@colId or parentcolId=@parentcolId
)
select * from tableA
union
select * from tableB where colId=3 or parentcolId=3