select * from table where now() > ADDDATE(times,interval 15 day);
select * from table where now() > DATE_ADD(times,interval 15 day);In actual operation, the query results of these two statements are the same
Reference website
https://www.w3school.com.cn/sql/func_date_add.asp
MySQL DATE_ADD() function
Definition and usage
The DATE_ADD() function adds the specified time interval to the date.
grammar
DATE_ADD(date,INTERVAL expr type)
The date parameter is a valid date expression. The expr parameter is the time interval you wish to add.
The type parameter can have the following values:
| Type value |
|---|
| MICROSECOND |
| SECOND |
| MINUTE |
| HOUR |
| DAY |
| WEEK |
| MONTH |
| QUARTER |
| YEAR |
| SECOND_MICROSECOND |
| MINUTE_MICROSECOND |
| MINUTE_SECOND |
| HOUR_MICROSECOND |
| HOUR_SECOND |
| HOUR_MINUTE |
| DAY_MICROSECOND |
| DAY_SECOND |
| DAY_MINUTE |
| DAY_HOUR |
| YEAR_MONTH |
Instance
Suppose we have the following table:
| OrderId | ProductName | OrderDate |
|---|---|---|
| 1 | 'Computer' | 2008-12-29 16:25:46.635 |
Now, we want to add 2 days to "OrderDate" so that we can find the payment date.
We use the following SELECT statement:
SELECT OrderId,DATE_ADD(OrderDate,INTERVAL 2 DAY) AS OrderPayDate
FROM Orders
result:
| OrderId | OrderPayDate |
|---|---|
| 1 | 2008-12-31 16:25:46.635 |