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建表语句:
| create table test_table( id integer not null auto_increment primary key, stamp_created timestamp default ‘0000-00-00 00:00:00‘, stamp_updated timestamp default now() on update now() ); |
测试:
mysql> insert into test_table(stamp_created, stamp_updated) values(null, null);
Query OK, 1 row affected (0.06 sec)
mysql> select * from t5;
+----+---------------------+---------------------+
| id | stamp_created | stamp_updated |
+----+---------------------+---------------------+
| 2 | 2009-04-30 09:44:35 | 2009-04-30 09:44:35 |
+----+---------------------+---------------------+
2 rows in set (0.00 sec)
mysql> update test_table set id = 3 where id = 2;
Query OK, 1 row affected (0.05 sec) Rows matched: 1 Changed: 1 Warnings: 0
mysql> select * from test_table;
+----+---------------------+---------------------+
| id | stamp_created | stamp_updated |
+----+---------------------+---------------------+
| 3 | 2009-04-30 09:44:35 | 2009-04-30 09:46:59 |
+----+---------------------+---------------------+
2 rows in set (0.00 sec)参考这里:
there can be only one TIMESTAMP column with CURRENT_TIMESTAMP in DEFAULT or ON UPDATE clause
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原文地址：http://www.cnblogs.com/winner-0715/p/5763314.html
