mysql - 如何将 mysql 列的默认值设置为 unix_timestamp？

Question

我在想这样的事情:

`post_modified` int(11) NOT NULL DEFAULT UNIX_TIMESTAMP (NOW ()) ON UPDATE UNIX_TIMESTAMP (NOW ()),

但是这段代码不起作用。

Answer 1

Note : I have no idea about the performance of MYSQL TRIGGER

Please go through these links

1. Identify some of the drawback of implementing sql server triggers

2. Using Triggers

您可以为此创建触发器。

for insertion

在为每个行设置新的 {table_name} 插入之前创建触发器 {trigger_name}。{field_name} = UNIX_TIMESTAMP(NOW());

for update

在更新 {table_name} 之前创建触发器 {trigger_name} FOR EACH ROW SET new.{field_name} = UNIX_TIMESTAMP(NOW());