獲取所選日期月份的第一天到最后一天之間的數據

Question

如何在SQL中的特定月份的第一天和最后一天之間獲取數據？

以下是sql查詢請幫忙

DECLARE @mydate DATETIME
SELECT @mydate = GETDATE()
select TransactionCode from ReceiptsPayments 
where ReferenceDate >= (SELECT CONVERT(VARCHAR(25),
                                       DATEADD(dd,-(DAY(@mydate)-1),@mydate),
                                       101) AS Date_Value)
  AND ReferenceDate <= (SELECT CONVERT(VARCHAR(25),
                                       DATEADD(dd,
                                               -(DAY(DATEADD(mm,1,@mydate))),
                                               DATEADD(mm,1,@mydate)),
                                       101))
GO

Answer 1

試試這個-

DECLARE @mydate DATETIME
SELECT @mydate = GETDATE()

SELECT TransactionCode 
FROM dbo.ReceiptsPayments 
WHERE MONTH(ReferenceDate) = MONTH(@mydate) 
    AND YEAR(ReferenceDate) = YEAR(@mydate)

Answer 2

select TransactionCode 
from ReceiptsPayments 
where 
month(ReferenceDate) = month(@mydate) 
and 
year(ReferenceDate) = year(@mydate) ;

Answer 3

DECLARE @mydate DATETIME 
SELECT @mydate = GETDATE() 

select TransactionCode 
  from ReceiptsPayments 
 where ReferenceDate >= DATEADD(month, DATEDIFF(month, 0, @mydate), 0)
   and ReferenceDate <= DATEADD(day, -1, DATEADD(month, DATEDIFF(month, 0, @mydate) + 1, 0))

Answer 4

我自己使用DATEADD / DATEDIFF模式：

select TransactionCode from ReceiptsPayments
where
    ReferenceDate >= DATEADD(month,DATEDIFF(month,'20010101',GETDATE()),'20010101') and
    ReferenceDate <= DATEADD(month,DATEDIFF(month,'20010101',GETDATE()),'20010131')

這有點可愛，因為當要求在每個月的31日增加月份數時，它會自動調整為到達月份的正確結束日期。

另外，如果您的專欄中有時間，一個更好的查詢將是：

select TransactionCode from ReceiptsPayments
where
    ReferenceDate >= DATEADD(month,DATEDIFF(month,'20010101',GETDATE()),'20010101') and
    ReferenceDate < DATEADD(month,DATEDIFF(month,'20010101',GETDATE()),'20010201')

然后使用下個月的1號進行<比較。 通常，這對於具有時間成分的datetime更好。