DATE_SUB()
Function Description
DATE_SUB() is used to perform date operations: DATE_SUB() function subtracts the specified time interval from the date date. If date is NULL, the function returns NULL.
Function Syntax
DATE_SUB(date,INTERVAL expr unit)
Parameter definition
| Parameters | Description |
|---|---|
| date | Required parameters. The date parameter is a legal date expression. |
| expr | Required parameters. The expr parameter is the time interval that needs to be added to date. If expr is a negative number, it can start with "-". |
| unit | Required parameters. The unit parameter can be the following values: MICROSECOND SECOND MINUTE HOUR DAY WEEK MONTH QUA TER YEAR SECOND_MICROSECOND MINUTE_MICROSECOND MINUTE_MICROSECOND MINUTE_SECOND HOUR_MICROSECOND HOUR_MICROSECOND HOUR_SECOND HOUR_SECOND HOUR_SECOND HOUR_MINUTE DAY_MICROSECOND DAY_MICROSECOND DAY_MICROSECOND DAY_MICROSECOND DAY_MICROSECOND YEAR_MONTH |
Example
create table t2(orderid int, productname varchar(20), orderdate datetime);
insert into t2 values ('1','Jarl','2008-11-11 13:23:44.657');
mysql> SELECT OrderId,DATE_SUB(OrderDate,INTERVAL 5 DAY) AS SubtractDate FROM t2;
+----------------------------------------+
| orderid | subtractdate |
+----------------------------------------+
| 1 | 2008-11-06 13:23:45 |
+----------------------------------------+
1 row in set (0.01 sec)
limit
Currently, the date format only supports the data formats of yyyy-mm-dd and yyyymmdd.