Question

create procedure [dbo].[teststoredproc] (@startDate datetime, @endDate datetime) as
begin
set nocount on;

merge TargetTable with (tablockx) as target
using (
    select
        S.columnA, S.columnB
    from
        SourceTable S
    where
        S.ModifiedOn >= @startDate and S.ModifiedOn <= @enddate) as source
    (columnA, columnB)
on (target.columnA= source.columnA)
when matched then update set
    target.columnA = source.columnA, target.columnB = source.columnB
when not matched by target then insert
    (columnA, columnB) values (source.columnA, source.columnB);

GO

I get the following error when I try to compile the statement:

Incorrect syntax near ‘;’.

at the very last line which is:

(columnA, columnB) values (source.columnA, source.columnB);

Answer 1

the problem is that you are missing an END

when not matched by target then insert
    (columnA, columnB) values (source.columnA, source.columnB);

END

GO