mysql 两表结果集取差集

mysql 两表结果集取差集：

示例：

SELECT r1.* FROM 

(SELECT r.USER_ID FROM rocky_b_repaymentrecord r,rocky_borrow b WHERE r.BORROW_ID = b.ID AND r.`STATUS` = 1 AND b.BORROWTYPE = 2 GROUP BY r.USER_ID)　 r1 
LEFT JOIN (SELECT r.USER_ID FROM rocky_b_repaymentrecord r,rocky_borrow b WHERE r.BORROW_ID = b.ID AND r.`STATUS` = 0 AND b.BORROWTYPE = 2 GROUP BY r.USER_ID)　 r2 on(r1.USER_ID = r2.USER_ID)

WHERE r2.USER_ID IS NULL;

说明：表1和表2根据user_id取表1-表2的差集。