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在MySQL中按日期分组显示记录

2024-05-01 07:11:06 397

要在MySQL中对日期进行分组，请使用GROUPBY子句-

mysql> create table DemoTable2002
(
   CustomerName varchar(20),
   CustomerShippingDate datetime
);

使用插入命令在表中插入一些记录-

mysql> insert into DemoTable2002 values('Chris','2019-01-10');
mysql> insert into DemoTable2002 values('David','2018-12-31');
mysql> insert into DemoTable2002 values('David','2019-12-16');
mysql> insert into DemoTable2002 values('Chris','2018-12-01');

使用select语句显示表中的所有记录-

mysql> select * from DemoTable2002;

这将产生以下输出-

+--------------+----------------------+
| CustomerName | CustomerShippingDate |
+--------------+----------------------+
| Chris        | 2019-01-10 00:00:00  |
| David        | 2018-12-31 00:00:00  |
| David        | 2019-12-16 00:00:00  |
| Chris        | 2018-12-01 00:00:00  |
+--------------+----------------------+
4 rows in set (0.00 sec)

这是通过按日期分组显示记录的查询-

mysql> select date(min(CustomerShippingDate)),date(max(CustomerShippingDate)),CustomerName
   from DemoTable2002
   group by CustomerName;

这将产生以下输出-

+---------------------------------+---------------------------------+--------------+
| date(min(CustomerShippingDate)) | date(max(CustomerShippingDate)) | CustomerName |
+---------------------------------+---------------------------------+--------------+
| 2018-12-01                      | 2019-01-10                      | Chris        |
| 2018-12-31                      | 2019-12-16                      | David        |
+---------------------------------+---------------------------------+--------------+
2 rows in set (0.00 sec)

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在MySQL中按日期分组显示记录

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