如何按月选择 MySQL?
mysqlmysqli database更新于 2024/8/11 9:16:17
要按月选择，请使用 MONTH() 函数。让我们首先创建一个表 −
mysql> create table DemoTable1599 -> ( -> Shippingdate datetime -> ); Query OK, 0 rows affected (0.78 sec)
使用 insert 命令在表中插入一些记录 −
mysql> insert into DemoTable1599 values('2019-10-21');
Query OK, 1 row affected (0.28 sec)
mysql> insert into DemoTable1599 values('2018-12-12');
Query OK, 1 row affected (0.35 sec)
mysql> insert into DemoTable1599 values('2015-11-21');
Query OK, 1 row affected (0.34 sec)
mysql> insert into DemoTable1599 values('2017-12-31');
Query OK, 1 row affected (0.20 sec)
mysql> insert into DemoTable1599 values('2018-12-26');
Query OK, 1 row affected (0.17 sec)
使用 select 语句显示表中的所有记录 −
mysql> select * from DemoTable1599;
这将产生以下输出 −
+---------------------+ | Shippingdate | +---------------------+ | 2019-10-21 00:00:00 | | 2018-12-12 00:00:00 | | 2015-11-21 00:00:00 | | 2017-12-31 00:00:00 | | 2018-12-26 00:00:00 | +---------------------+ 5 rows in set (0.00 sec)
以下是按月份选择的查询 −
mysql> select * from DemoTable1599 -> where month(Shippingdate)=12;
这将产生以下输出 −
+---------------------+ | Shippingdate | +---------------------+ | 2018-12-12 00:00:00 | | 2017-12-31 00:00:00 | | 2018-12-26 00:00:00 | +---------------------+ 3 rows in set (0.00 sec)
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