MySQL 查询从带有日期记录的表中获取最新日期
我们首先创建一个表 -
mysql> create table DemoTable ( DueDate date ); Query OK, 0 rows affected (0.56 sec)
使用插入命令在表中插入一些记录 -
mysql> insert into DemoTable values('2018-10-01'); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable values('2016-12-31'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable values('2019-07-02'); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable values('2015-01-12'); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable values('2019-04-26'); Query OK, 1 row affected (0.13 sec)
使用选择语句显示表中的所有记录 -
mysql> select *from DemoTable;
这将生成以下输出 -
+------------+ | DueDate | +------------+ | 2018-10-01 | | 2016-12-31 | | 2019-07-02 | | 2015-01-12 | | 2019-04-26 | +------------+ 5 rows in set (0.00 sec)
假设当前日期是 2019-08-15。现在我们将获取最新日期 -
mysql> select *from DemoTable order by DueDate DESC limit 1;
这将生成以下输出 -
+------------+ | DueDate | +------------+ | 2019-07-02 | +------------+ 1 row in set (0.03 sec)
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