在MySQL中将dd / mm / yyyy字符串转换为Unix时间戳？
借助UNIX_TIMESTAMP()将dd/mm/yyyy字符串转换为Unix时间戳。语法如下-
SELECT UNIX_TIMESTAMP(STR_TO_DATE(yourColumnName,'%d/%m/%Y')) 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 ConvertddmmyyyyInUnixTimeStamp -> ( -> Id int NOT NULL AUTO_INCREMENT, -> Created_at varchar(30), -> PRIMARY KEY(Id) -> );
使用insert命令在表中插入一些记录。查询如下-
mysql> insert into ConvertddmmyyyyInUnixTimeStamp(Created_at) values('10/11/2012');
mysql> insert into ConvertddmmyyyyInUnixTimeStamp(Created_at) values('11/12/2013');
mysql> insert into ConvertddmmyyyyInUnixTimeStamp(Created_at) values('10/12/2012');
mysql> insert into ConvertddmmyyyyInUnixTimeStamp(Created_at) values('31/01/2015');
mysql> insert into ConvertddmmyyyyInUnixTimeStamp(Created_at) values('24/04/2016');
mysql> insert into ConvertddmmyyyyInUnixTimeStamp(Created_at) values('20/09/2017');
mysql> insert into ConvertddmmyyyyInUnixTimeStamp(Created_at) values('15/03/2018');使用select语句显示表中的所有记录。查询如下-
mysql> select *from ConvertddmmyyyyInUnixTimeStamp;
以下是输出-
+----+------------+ | Id | Created_at | +----+------------+ | 1 | 10/11/2012 | | 2 | 11/12/2013 | | 3 | 10/12/2012 | | 4 | 31/01/2015 | | 5 | 24/04/2016 | | 6 | 20/09/2017 | | 7 | 15/03/2018 | +----+------------+ 7 rows in set (0.00 sec)
现在让我们将dd/mm/yyyy字符串转换为UNIX时间戳：
mysql> select unix_timestamp(str_to_date(Created_at,'%d/%m/%Y')) as UnixTimestamp from ConvertddmmyyyyInUnixTimeStamp;
以下是输出：
+---------------+ | UnixTimestamp | +---------------+ | 1352485800 | | 1386700200 | | 1355077800 | | 1422642600 | | 1461436200 | | 1505845800 | | 1521052200 | +---------------+ 7 rows in set (0.00 sec)