CommandText=@"MERGE INTO essen_customer WITH(HOLDLOCK) as target USING(
select @request_id as request_id, @customer_id as customer_id ) as source (request_id,customer_id)
CommandText=@"MERGE INTO essen_request_info WITH(HOLDLOCK) as target USING(select * from essen_request_info a where a.request_id=@request_id ) as source (request_id,customer_id)
on(target.request_id = source.request_id )
WHEN MATCHED THEN UPDATE SET customer_id = @customer_id
WHEN NOT MATCHED THEN INSERT(request_id,customer_id)
CommandText=@"delete from essen_request_info where request_id=@request_id;"
CommandText=@"MERGE INTO essen_customer WITH(HOLDLOCK) as target USING(select * from essen_customer a where a.customer_id=@customer_id) as source (customer_id,request_customer_id)
on(target.customer_id = source.customer_id )
WHEN MATCHED THEN UPDATE SET request_customer_id = @request_customer_id
WHEN NOT MATCHED THEN INSERT(customer_id,request_customer_id)