--创建测试表: CREATE TABLE MM (ID NUMBER, NAME VARCHAR2(20)); CREATE TABLE MN (ID NUMBER, NAME VARCHAR2(20)); --插入数据 INSERT INTO MM VALUES (1, 'A'); INSERT INTO MN VALUES (1, 'B'); --测试Merge MERGE INTO MN A USING MM B ON(A.ID=B.ID) WHEN MATCHED THEN UPDATE SET A.NAME = B.NAME WHEN NOT MATCHED THEN INSERT(A.ID,A.NAME) VALUES(B.ID, B.NAME);
最终查询表A:MN,结果集为:
SQL> SELECT * FROM MN; ID NAME ---------- -------------------- 1 A