Fomu ya EXTRACT() ya MySQL

Fomu za Tarehe za MySQL

Uainishaji na Matumizi

Fomu ya EXTRACT() inatokana na kurejea sehemu kizali/kisikio za tarehe/muda, kama ya mwaka, mwezi, siku, saa, dakika na hivyo.

Makadara

EXTRACT(unit FROM date)

date Paramaga inaonekana kama hitimisho ya tarehe.unit Paramaga inaweza kuwa katika maandiko yafuatayo:

Wapya wa Unit
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

Tunahakikisha tabia yetu inayolengwa kama inayofuata:

OrderId ProductName OrderDate
1 'Computer' 2008-12-29 16:25:46.635

Tumekua kutumia mambo ya SELECT inayofuata:

SELECT EXTRACT(YEAR FROM OrderDate) AS OrderYear,
EXTRACT(MONTH FROM OrderDate) AS OrderMonth,
EXTRACT(DAY FROM OrderDate) AS OrderDay
FROM Orders
WHERE OrderId=1

Matokeo:

OrderYear OrderMonth OrderDay
2008 12 29

Fomu za Tarehe za MySQL