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MySQL查询以45天为间隔添加天数并在新列中显示输出

2024-04-25 08:10:04 531

为此，您可以使用date_add()。让我们首先创建一个表-

mysql> create table DemoTable1930
   (
   DueTime datetime
   );

使用插入命令在表中插入一些记录-

mysql> insert into DemoTable1930 values('2017-10-21');
mysql> insert into DemoTable1930 values('2019-12-14');
mysql> insert into DemoTable1930 values('2018-11-26');
mysql> insert into DemoTable1930 values('2014-06-16');

使用select语句显示表中的所有记录-

mysql> select * from DemoTable1930;

这将产生以下输出-

+---------------------+
| DueTime             |
+---------------------+
| 2017-10-21 00:00:00 |
| 2019-12-14 00:00:00 |
| 2018-11-26 00:00:00 |
| 2014-06-16 00:00:00 |
+---------------------+
4 rows in set (0.00 sec)

这是添加天数的查询-

mysql> select DueTime,date_add(DueTime, interval 45 day) as ManyDays from DemoTable1930;

这将产生以下输出-

+---------------------+---------------------+
| DueTime             | ManyDays            |
+---------------------+---------------------+
| 2017-10-21 00:00:00 | 2017-12-05 00:00:00 |
| 2019-12-14 00:00:00 | 2020-01-28 00:00:00 |
| 2018-11-26 00:00:00 | 2019-01-10 00:00:00 |
| 2014-06-16 00:00:00 | 2014-07-31 00:00:00 |
+---------------------+---------------------+
4 rows in set (0.00 sec)

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MySQL查询以45天为间隔添加天数并在新列中显示输出

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