最高效的删除重复记录方法 (使用ROWID)
例子:
INSERT INTO EMP(ID,NAME) VALUES(1,'张三');
INSERT INTO EMP(ID,NAME) VALUES(2,'张三');
INSERT INTO EMP(ID,NAME) VALUES(1,'张三');
SELECT * FROM EMP;
DELETE FROM EMP E WHERE E.ROWID>(SELECT MIN(X.ROWID) FROM EMP X WHERE X.ID = E.ID AND X.NAME=E.NAME);
commit;