如何在 sql 中的日期范围之间获取数据

Question

I need to select records between the dates:

If I input BeginDate as 5/Jan/2019 18:40:00 and EndDate as 25/Jan/2019 18:40:00 then both rows must be selected.

Another example... a record's BeginDate and EndDate respectively 1/Jan/2019 and 31/Jan/2019. If I input 5/Jan/2019 and 25/Jan/2019 then that record must be selected.

Think is if I input any dates between the actual Begindate and EndDate of the records that should be selected.

I used between but it selecting the records having the exact date values.

BeginDate >= @BeginDate 
and BeginDate <= dateadd(day, 1, @EndDate)
and (EndDate is null or EndDate> @EndDate)

Can anyone help me to fix this.

Answer 1

Based on your feedback, you need a simple date overlap query:

SELECT *
FROM t
WHERE @EndDate   > BeginDate
AND   @BeginDate < EndDate

It will match the rows where the Start and EndDate intersect @Start and @EndDate in any manner. It assumes that end dates are exclusive. You might want to add (... OR EndDate IS NULL) to handle null values.