[英]MS SQL compare dates?
我有 2 個日期(日期時間):
日期 1 = 2010-12-31 15:13:48.593
日期 2 = 2010-12-31 00:00:00.000
同一天,只是不同的時間。 由於 date1 時間,使用 <= 比較 date1 和 date2 不起作用。 所以 date1 <= date2 是錯誤的,但應該是正確的。 我可以只看年、月、日來比較它們,使它們相同嗎? 它的 SQL Server 2008。
謝謝:)
SELECT CASE WHEN CAST(date1 AS DATE) <= CAST(date2 AS DATE) ...
應該做你需要的。
WITH dates(date1, date2, date3, date4)
AS (SELECT CAST('20101231 15:13:48.593' AS DATETIME),
CAST('20101231 00:00:00.000' AS DATETIME),
CAST('20101231 15:13:48.593' AS DATETIME),
CAST('20101231 00:00:00.000' AS DATETIME))
SELECT CASE
WHEN CAST(date1 AS DATE) <= CAST(date2 AS DATE) THEN 'Y'
ELSE 'N'
END AS COMPARISON_WITH_CAST,
CASE
WHEN date3 <= date4 THEN 'Y'
ELSE 'N'
END AS COMPARISON_WITHOUT_CAST
FROM dates
返回
COMPARISON_WITH_CAST | COMPARISON_WITHOUT_CAST
Y N
使用DATEDIFF
函數的日期部分day
。
SELECT ...
FROM ...
WHERE DATEDIFF(day, date1, date2) >= 0
請注意,如果要測試date1
<= date2
則需要測試DATEDIFF(day, date1, date2) >= 0
,或者您可以測試DATEDIFF(day, date2, date1) <= 0
。
簡單的一線解決方案是
datediff(dd,'2010-12-31 15:13:48.593','2010-12-31 00:00:00.000')=0
datediff(dd,'2010-12-31 15:13:48.593','2010-12-31 00:00:00.000')<=1
datediff(dd,'2010-12-31 15:13:48.593','2010-12-31 00:00:00.000')>=1
您可以嘗試使用除“dd”以外的其他選項
我總是使用DateDiff(day,date1,date2)來比較兩個日期。
結帳以下示例。 只需復制並在Ms sql server中運行即可。 此外,嘗試更改日期為31 dec至30 dec並檢查結果
BEGIN
declare @firstDate datetime
declare @secondDate datetime
declare @chkDay int
set @firstDate ='2010-12-31 15:13:48.593'
set @secondDate ='2010-12-31 00:00:00.000'
set @chkDay=Datediff(day,@firstDate ,@secondDate )
if @chkDay=0
Begin
Print 'Date is Same'
end
else
Begin
Print 'Date is not Same'
end
End
永遠不會太晚我在我的 SQL 中使用下面的腳本並且它對我來說工作正常
SELECT
ID ,
CASE
WHEN DATEDIFF(day, ExpectedDate, ActualDate) < 0
THEN 'Late'
ELSE 'OnTime'
END shipmentStatus
FROM orders
ORDER BY ExpectedDate
試試這個:
BEGIN
declare @Date1 datetime
declare @Date2 datetime
declare @chkYear int
declare @chkMonth int
declare @chkDay int
declare @chkHour int
declare @chkMinute int
declare @chkSecond int
declare @chkMiliSecond int
set @Date1='2010-12-31 15:13:48.593'
set @Date2='2010-12-31 00:00:00.000'
set @chkYear=datediff(yyyy,@Date1,@Date2)
set @chkMonth=datediff(mm,@Date1,@Date2)
set @chkDay=datediff(dd,@Date1,@Date2)
set @chkHour=datediff(hh,@Date1,@Date2)
set @chkMinute=datediff(mi,@Date1,@Date2)
set @chkSecond=datediff(ss,@Date1,@Date2)
set @chkMiliSecond=datediff(ms,@Date1,@Date2)
if @chkYear=0 AND @chkMonth=0 AND @chkDay=0 AND @chkHour=0 AND @chkMinute=0 AND @chkSecond=0 AND @chkMiliSecond=0
Begin
Print 'Both Date is Same'
end
else
Begin
Print 'Both Date is not Same'
end
End
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