https://learn.microsoft.com/ko-kr/sql/t-sql/statements/merge-transact-sql?view=sql-server-ver16 MERGE(Transact-SQL) - SQL Server MERGE(Transact-SQL) learn.microsoft.com 단일 테이블 적용 예제 1 2 3 4 5 6 7 MERGE INTO [dbo].[Game] -- 적용 테이블 USING (SELECT 1 AS DUAL) AS tmpDual -- Dummy SubQuery ON (AccountID = @AID) -- 비교문 (WHERE) WHEN MATCHED THEN -- 매칭 UPDATE SET Level = @Level WHEN NOT MATHCED THEN -- 매칭..