我有两张桌子 tb1 和 tb2
tb1 ----- tb1Id tb2 ----- tb2Id | tb1Id | dateTB2提交 | 时间输入
加入 tb1 时如何从各个行中找到最低日期。例如:
SELECT tb1.tb1id,
tb2.datetb2submitted,
tb2.timein
FROM tb1,
tb2
WHERE tb1.tb1id = tb2.tb1id
+-------------+----------------------+----------+
| tb1.tb1Id | tb2.dateTB2Submitted | timeIn |
+-------------+----------------------+----------+
| 1 | 2011-04-02 | 11:00:00
| 1 | 2011-04-02 | 10:30:00 <--i want this
| 2 | 2011-04-29 | 12:30:00
| 2 | 2011-04-29 | 10:30:00 <--i want this