如何在 MySQL 中从日期中选择月份和年份?
mysqlmysqli database更新于 2023/11/26 23:36:00
要在 MySQL 中选择月份和年份，您可以使用 MONTH() 和 YEAR() 方法。让我们首先创建一个表 −
mysql> create table DemoTable -> ( -> DueDate datetime -> ); Query OK, 0 rows affected (0.90 sec)
使用 insert 命令在表中插入一些记录 −
mysql> insert into DemoTable values('2019-01-21');
Query OK, 1 row affected (0.22 sec)
mysql> insert into DemoTable values('2019-06-15');
Query OK, 1 row affected (0.16 sec)
mysql> insert into DemoTable values('2018-12-01');
Query OK, 1 row affected (0.16 sec)
mysql> insert into DemoTable values('2015-04-01');
Query OK, 1 row affected (0.16 sec)
mysql> insert into DemoTable values('2016-08-14');
Query OK, 1 row affected (0.19 sec)
使用 select 语句显示表中的所有记录 −
mysql− select *from DemoTable;
输出
这将产生以下输出 −
+---------------------+ | DueDate | +---------------------+ | 2019-01-21 00:00:00 | | 2019-06-15 00:00:00 | | 2018-12-01 00:00:00 | | 2015-04-01 00:00:00 | | 2016-08-14 00:00:00 | +---------------------+ 5 rows in set (0.00 sec)
以下是从 MySQL 选择月份和年份的查询 −
mysql> select MONTH(DueDate) AS MONTH, YEAR(DueDate) AS YEAR from DemoTable;
输出
这将产生以下输出 −
+-------+------+ | MONTH | YEAR | +-------+------+ | 1 | 2019 | | 6 | 2019 | | 12 | 2018 | | 4 | 2015 | | 8 | 2016 | +-------+------+ 5 rows in set (0.00 sec)
