MySQL 将日期时间记录从 GMT+7 更新为 UTC

Question

在我的数据库表中有一个 created_at 列，其中包含 Y-m-d H:i:s GMT+7 格式的记录，我想更新所有 created_at记录成UTC格式，例如:

/*Old Records in GMT+7 format*/
+-------------------+
|    created_at     |
+-------------------+
|2018-09-30 12:11:25|
|2018-10-01 02:44:05|
|2018-10-02 14:45:15|
+-------------------+


/*New Records in UTC format*/
+-------------------+
|    created_at     |
+-------------------+
|2018-09-30 05:11:25|
|2018-09-30 19:44:05|
|2018-10-02 07:45:15|
+-------------------+

Answer 1

使用 CONVERT_TZ(created_at,'+00:00','-7:00'):

demo

SELECT created_at,CONVERT_TZ(created_at,'+00:00','-7:00');

输出:

createddate          utctime
2018-10-02 08:56:29  2018-10-02 01:56:29