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我試圖做一個臨時日誌數據庫。仍然在學習層面上。在mysql中選擇最後一行,不帶自動增量
如何從數據庫中獲取最後一行?
select * from tempdat order by tdate desc limit 1
給出了當天的第一個入口,但我想要最後一個。下面看到的,它可以返回入口絲毫時間21:25:03
+------------+----------+------+-------------+
| 2014-03-29 | 21:20:02 | inne | 22.875 |
| 2014-03-29 | 21:25:03 | inne | 22.875 |
+------------+----------+------+-------------+
1933 rows in set (0.16 sec)
mysql> select * from tempdat order by tdate desc limit 1;
+------------+----------+------+-------------+
| tdate | ttime | zone | temperature |
+------------+----------+------+-------------+
| 2014-03-29 | 00:00:03 | inne | 21.250 |
+------------+----------+------+-------------+
1 row in set (0.03 sec)