MERGE 更新表数据

;WITH TempData AS
(
SELECT 字段
FROM 来源表(可选)
)
MERGE 目标表 AS target
USING TempData AS source
ON (target.[EID_nvarchar] = source.[EID_nvarchar])
WHEN MATCHED THEN
UPDATE 
SET 字段 = source.字段,
字段 = source.字段
WHEN NOT MATCHED THEN
INSERT (
字段, 
字段
)
VALUES(
source.字段, 
source.字段
);