修改日期函數基於Where子句SQL Server

Question

當前我的情況聲明基於當月的第一天。

SELECT 
[TicketNbr] AS 'Ticket Nbr' 
-- 1st day of this month 
, (CASE WHEN [date_entered] >= DATEADD(day,-1, GETDATE()) THEN 1 ELSE 0 END) AS '1=Opened Within Last 24HR 0=No' 
FROM [v_rpt_Service] WITH(NOLOCK) 
WHERE ([date_entered] >= '2017-04-01T11:24:00.000' AND [date_entered] < '2017-05-01T11:24:00.000') 
GROUP BY [TicketNbr] 

但是我想修改它，所以它會在where子句中調整，因此將根據日期範圍 。 （這可以是任何日期範圍。）

如何在沒有變量的情況下執行此操作？

Answer 1

聽起來像是你只需要變量

declare @startDate datetime = '2017-04-01 11:24:00' 
declare @endDate datetime = '2017-05-01 11:24:00' 

SELECT 
[TicketNbr] AS 'Ticket Nbr' 
-- 1st day of this month 
, (CASE WHEN [date_entered] between @startDate and @endDate THEN 1 ELSE 0 END) AS '1=Opened Within Date Range 0= No' 
FROM [v_rpt_Service] WITH(NOLOCK) 
WHERE ([date_entered] >= startDate AND [date_entered] < @endDate) 
GROUP BY [TicketNbr] 

Answer 2

SELECT 
[TicketNbr] AS 'Ticket Nbr' 
-- 1st day of this month 
, (CASE WHEN [date_entered] >= DATEADD(day,-1, GETDATE()) THEN 1 ELSE 0 END) AS '1=Opened Within Last 24HR 0=No' 
FROM [v_rpt_Service] WITH(NOLOCK) 
WHERE ([date_entered] >= DATEFROMPARTS(YEAR(GETDATE()), MONTH(GETDATE()), 1) AND [date_entered] < DATEFROMPARTS(YEAR(GETDATE()), MONTH(DATEADD(MONTH, 1, GETDATE())) ,1)) 
GROUP BY [TicketNbr]