mysql中DATE默认值

更新，在stackoverflow上找到了8.0.13版本的解决方案： 链接

经过查看官网，发现5.7版本： 链接

With one exception, the default value specified in a DEFAULT clause  must be a literal constantit cannot be a function or an expression . This means, for example, that you cannot set the default for a date column to be the value of a function such as NOW() or CURRENT_DATE . The exception is that, for TIMESTAMP and DATETIME columns, you can specify CURRENT_TIMESTAMP as the default. See Section 11.2.6, “Automatic Initialization and Updating for TIMESTAMP and DATETIME” .

创建表的时候，想为DATE类型设定默认值当前日期。发现一直报错，百度没有什么好办法。

CREATE TABLE `test1` (

`a` timestamp(6) NOT NULL DEFAULT CURRENT_TIMESTAMP(6),

`b` timestamp(6) NOT NULL DEFAULT CURRENT_TIMESTAMP(6),

`c` timestamp(6) NOT NULL DEFAULT CURRENT_TIMESTAMP(6)

) ENGINE=MyISAM DEFAULT CHARSET=utf8

建表test1。3个字段 a,b,c

insert into test1 VALUES(NULL,NULL,NULL)

插入的时候设置3字段都是 null

然后成功

Affected rows : 1, Time: 0.00sec

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