在一个SQL查询中从2个表中获取数据

Question

我在SQL中有两个表，如下所示，我想从这两个表中获取数据，显示为预期结果

Answer 1

我认为值是列4,5,6必须是T1和T2的总和：

SELECT
    t1.No, t1.Month, t1.Salary + t2.Salary,
    ( t1.PresenceTime + t2.PresenceTime ) AS PresenceTime,
    ( t1.AbsencePaidTime + t2.AbsencePaidTime ) AS AbsencePaidTime,
    ( t1.PresenceTargetTime + t2.PresenceTargetTime ) AS PresenceTargetTime
  FROM TABLE1 t1 JOIN TABLE2 t2 ON t1.No=t2.No AND t1.Month=t2.Month;

不确定仅No或Month上的加入是否足够。

Answer 2

这不是您需要的联接，而是UNION。你可以做到

SELECT * FROM TABLE1
UNION
SELECT * FROM TABLE2