sql [sql技巧]一些sql技巧#sql

Posted 2021-05-13

-- 查询两个表差集
SELECT actual_get_no,polno
FROM (
    SELECT t.actual_get_no,t.polno FROM tmp t
    UNION ALL
    SELECT tr.actual_get_no,tr.polno FROM tmp_right tr
) tbl
GROUP BY actual_get_no, polno
HAVING count(*) = 1;