查找当前日期与 MySQL 表中日期记录之间的差异
mysqlmysqli database
要查找差异，请使用 DATEDIFF() 方法。让我们首先创建一个表 −
mysql> create table DemoTable1446 -> ( -> DueDate date -> ); Query OK, 0 rows affected (1.42 sec)
使用 insert 命令在表中插入一些记录 −
mysql> insert into DemoTable1446 values('2019-01-21');
Query OK, 1 row affected (0.69 sec)
mysql> insert into DemoTable1446 values('2019-02-01');
Query OK, 1 row affected (0.44 sec)
mysql> insert into DemoTable1446 values('2019-09-30');
Query OK, 1 row affected (0.16 sec)
使用 select 语句显示表中的所有记录 −
mysql> select * from DemoTable1446;
这将产生以下输出 −
+------------+ | DueDate | +------------+ | 2019-01-21 | | 2019-02-01 | | 2019-09-30 | +------------+ 3 rows in set (0.10 sec)
The current date is as follows −
mysql> select curdate(); +------------+ | curdate() | +------------+ | 2019-10-01 | +------------+ 1 row in set (0.12 sec)
以下查询获取当前日期和表中日期记录之间的差异 −
mysql> select datediff(curdate(),DueDate) from DemoTable1446;
这将产生以下输出 −
+-----------------------------+ | datediff(curdate(),DueDate) | +-----------------------------+ | 253 | | 242 | | 1 | +-----------------------------+ 3 rows in set (0.00 sec)
