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将日期和时间从单独的列连接到MySQL中的单个列

2024-04-23 23:56:05 338

为此，使用CONCAT()方法连接日期和时间。让我们首先创建一个表-

mysql> create table DemoTable
   -> (
   -> ShippingDate date,
   -> ShippingTime time,
   -> ShippingDatetime datetime
   -> );

使用插入命令在表中插入一些记录-

mysql> insert into DemoTable(ShippingDate,ShippingTime) values('2019-01-10', '10:40:20');

mysql> insert into DemoTable(ShippingDate,ShippingTime) values('2019-06-14', '04:00:10');

使用select语句显示表中的所有记录-

mysql> select *from DemoTable;

输出结果

+--------------+--------------+------------------+
| ShippingDate | ShippingTime | ShippingDatetime |
+--------------+--------------+------------------+
| 2019-01-10   | 10:40:20     | NULL             |
| 2019-06-14   | 04:00:10     | NULL             |
+--------------+--------------+------------------+
2 rows in set (0.00 sec)

这是将日期和时间从单独的列连接到MySQL中的单个列的查询-

mysql> update DemoTable set ShippingDatetime=concat(ShippingDate,' ',ShippingTime);
Rows matched: 2 Changed: 2 Warnings: 0

让我们再次检查表记录-

mysql> select *from DemoTable;

输出结果

+--------------+--------------+---------------------+
| ShippingDate | ShippingTime | ShippingDatetime    |
+--------------+--------------+---------------------+
| 2019-01-10   | 10:40:20     | 2019-01-10 10:40:20 |
| 2019-06-14   | 04:00:10     | 2019-06-14 04:00:10 |
+--------------+--------------+---------------------+
2 rows in set (0.00 sec)

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将日期和时间从单独的列连接到MySQL中的单个列

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