如何在MySQL中将DateTime转换为数字?
要将日期时间转换为MySQL中的数字,语法如下-
SELECT UNIX_TIMESTAMP(yourColumnName) as anyVariableName FROM yourTableName;
为了理解上述语法,让我们创建一个表。创建表的查询如下-
mysql> create table DateTimeToNumberDemo-> (
-> Id int NOT NULL AUTO_INCREMENT,
-> releasedDate datetime,
-> PRIMARY KEY(Id)
-> );
使用insert命令在表中插入一些记录。查询如下-
mysql> insert into DateTimeToNumberDemo(releasedDate) values(now());mysql> insert into DateTimeToNumberDemo(releasedDate) values(curdate());
mysql> insert into
DateTimeToNumberDemo(releasedDate) values('1978-01-19');
mysql> insert into DateTimeToNumberDemo(releasedDate) values('2016-09-13');
mysql> insert into DateTimeToNumberDemo(releasedDate) values('2017-11-12');
mysql> insert into DateTimeToNumberDemo(releasedDate) values('2018-12-09');
使用select语句显示表中的所有记录。查询如下-
mysql> select *from DateTimeToNumberDemo;
以下是输出-
+----+---------------------+| Id | releasedDate |
+----+---------------------+
| 1 | 2019-01-12 21:20:57 |
| 2 | 2019-01-12 00:00:00 |
| 3 | 1978-01-19 00:00:00 |
| 4 | 2016-09-13 00:00:00 |
| 5 | 2017-11-12 00:00:00 |
| 6 | 2018-12-09 00:00:00 |
+----+---------------------+
6 rows in set (0.00 sec)
以下是将日期时间转换为数字的查询-
mysql> select unix_timestamp(releasedDate) as DateToNumber from DateTimeToNumberDemo;
以下是输出-
+--------------+| DateToNumber |
+--------------+
| 1547308257 |
| 1547231400 |
| 253996200 |
| 1473705000 |
| 1510425000 |
| 1544293800 |
+--------------+
6 rows in set (0.00 sec)
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