Fomu ya DATE_ADD() ya MySQL
Makadaro na matumizi
Fomu ya DATE_ADD() inaongeza wakati kwa tarehe kikubaliane.
Muundo
DATE_ADD(date,INTERVAL expr type)
date Wakati hii ni ujumbe wa tarehe ambao ni lazima.expr Wakati hii ni wakati unaotaka kuongeza.
Wakati wa type inaweza kuwa katika maandiko ya hii:
| Wakati wa Type |
|---|
| 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 |
Mifano
Wakati tunahofikia tabia hii:
| OrderId | ProductName | OrderDate |
|---|---|---|
| 1 | 'Computer' | 2008-12-29 16:25:46.635 |
Sasa, tumekuwa na nafasi ya kuongeza 2 siku kwa 'OrderDate', kufafanua tarehe ya mpiga.
Tumekuwa na ujumbe wa SELECT hii:
SELECT OrderId,DATE_ADD(OrderDate,INTERVAL 2 DAY) AS OrderPayDate FROM Orders
Matokeo:
| OrderId | OrderPayDate |
|---|---|
| 1 | 2008-12-31 16:25:46.635 |
