T-SQL MERGE - 找出它采取了哪些动作
我需要知道MERGE语句是否执行了INSERT。在我的场景中，插入是0或1行。
测试代码：
DECLARE @t table (C1 int, C2 int)
DECLARE @C1 INT, @C2 INT
set @c1 = 1
set @c2 = 1
MERGE @t as tgt
USING (SELECT @C1, @C2) AS src (C1, C2)
ON (tgt.C1 = src.C1)
WHEN MATCHED AND tgt.C2 != src.C2 THEN
UPDATE SET tgt.C2 = src.C2
WHEN NOT MATCHED BY TARGET THEN
INSERT VALUES (src.C1, src. C2)
OUTPUT deleted.*, $action, inserted.*;
SELECT inserted.*
没有找到相关结果
已邀请:
2 个回复
犀寺扦
DECLARE @t table (C1 int, C2 int) DECLARE @C1 INT, @C2 INT DECLARE @Output TABLE (DeletedC1 INT, DeletedC2 INT, ActionType VARCHAR(20), InsertedC1 INT, InsertedC2 INT) set @c1 = 1 set @c2 = 1 MERGE @t as tgt USING (SELECT @C1, @C2) AS src (C1, C2) ON (tgt.C1 = src.C1) WHEN MATCHED AND tgt.C2 != src.C2 THEN UPDATE SET tgt.C2 = src.C2 WHEN NOT MATCHED BY TARGET THEN INSERT VALUES (src.C1, src. C2) OUTPUT deleted.*, $action, inserted.* INTO @Output; SELECT * FROM @Output WHERE ActionType = 'INSERT'募磷
触发器。 要将MERGE插入与其他插入区分开，可以使用第三个表来插入MERGE。在该表上定义一个触发器来处理合并的行并在目标表中插入行。