使用 MySQL 查找两个时间戳之间的天数差值
mysqlmysqli database
使用 MySQL 中的 DATEDIFF() 函数获取两个时间戳之间的天数差值。
语法如下 −
select datediff(yourColumnName1,yourColumnName2) as anyVariableName from yourTableName;
为了理解上述语法，让我们创建一个表。以下是创建表的查询 −
mysql> create table DifferenceTimestamp −> ( −> IssueTime timestamp, −> DueTime timestamp −> ); Query OK, 0 rows affected (0.66 sec)
使用 insert 命令在表中插入一些记录。我们在这里设置日期。查询如下 −
mysql> insert into DifferenceTimestamp values(now(),date_add(now(),interval -30 Day)); Query OK, 1 row affected (0.12 sec) mysql> insert into DifferenceTimestamp values(now(),date_add(now(),interval -24 Day)); Query OK, 1 row affected (0.16 sec) mysql> insert into DifferenceTimestamp values(now(),date_add(now(),interval -5 Day)); Query OK, 1 row affected (0.14 sec)
使用 select 语句显示表中的所有记录。查询如下 −
mysql> select *from DifferenceTimestamp;
以下是输出 −
+---------------------+---------------------+ | IssueTime | DueTime | +---------------------+---------------------+ | 2018-12-07 17:48:28 | 2018-11-07 17:48:28 | | 2018-12-07 17:48:40 | 2018-11-13 17:48:40 | | 2018-12-07 17:48:46 | 2018-12-02 17:48:46 | +---------------------+---------------------+ 3 rows in set (0.00 sec)
以下查询用于获取两个时间戳之间的天数差。查询如下 −
mysql> SELECT DATEDIFF(IssueTime, DueTime) AS DifferenceInTimestampDays from DifferenceTimestamp;
以下是输出 −
+---------------------------+ | DifferenceInTimestampDays | +---------------------------+ | 30 | | 24 | | 5 | +---------------------------+ 3 rows in set (0.00 sec)
