str_to_date
Description
Syntax
DATETIME STR_TO_DATE(VARCHAR str, VARCHAR format)
通过 format 指定的方式将 str 转化为 DATETIME 类型，若 str 无法按照 format 指定格式解析，则结果未指定。
支持date_format中的所有 format 格式，此外对于 '%Y' 和 '%Y-%m'，支持补齐日期剩余部分。
Example
mysql> select str_to_date('2014-12-21 12:34:56', '%Y-%m-%d %H:%i:%s');
+---------------------------------------------------------+
| str_to_date('2014-12-21 12:34:56', '%Y-%m-%d %H:%i:%s') |
+---------------------------------------------------------+
| 2014-12-21 12:34:56 |
+---------------------------------------------------------+
mysql> select str_to_date('2014-12-21 12:34%3A56', '%Y-%m-%d %H:%i%%3A%s');
+--------------------------------------------------------------+
| str_to_date('2014-12-21 12:34%3A56', '%Y-%m-%d %H:%i%%3A%s') |
+--------------------------------------------------------------+
| 2014-12-21 12:34:56 |
+--------------------------------------------------------------+
mysql> select str_to_date('200442 Monday', '%X%V %W');
+-----------------------------------------+
| str_to_date('200442 Monday', '%X%V %W') |
+-----------------------------------------+
| 2004-10-18 |
+-----------------------------------------+
mysql> select str_to_date("2020-09-01", "%Y-%m-%d %H:%i:%s");
+------------------------------------------------+
| str_to_date('2020-09-01', '%Y-%m-%d %H:%i:%s') |
+------------------------------------------------+
| 2020-09-01 00:00:00 |
+------------------------------------------------+
mysql> select str_to_date('2023','%Y');
+---------------------------+
| str_to_date('2023', '%Y') |
+---------------------------+
| 2023-01-01 |
+---------------------------+keywords
STR_TO_DATE,STR,TO,DATE