Question

I want check date between two dates the record is available or not

Here is the table:

Table1:

S.No    StartDate         EndDate
-------------------------------------
1.      15/10/2018        20/10/2018
2.      10/10/2018        13/10/2018
3.      21/10/2018        25/10/2018

I need the Output

Five Conditions:

within the date E.g. 17/10/2018 - 19/10/2018

S.No    StartDate         EndDate
-------------------------------------
 1      15/10/2018        20/10/2018

out of the date E.g. 14/10/2018 - 21/10/2018

S.No    StartDate         EndDate
-------------------------------------
 1      15/10/2018        20/10/2018
 3      21/10/2018        25/10/2018

Previous from start date E.g. 13/10/2018 - 16/10/2018

S.No    StartDate         EndDate
-------------------------------------
 1      15/10/2018        20/10/2018
 2      10/10/2018        13/10/2018

Next from start date E.g. 17/10/2018 - 20/10/2018

S.No    StartDate         EndDate
-------------------------------------
  1      15/10/2018        20/10/2018

another date E.g. 17/11/2018 - 21/11/2018
```
No records
```

Here is my idea and my query

SELECT * 
FROM Table1 
WHERE 
    CONVERT(DATE, '15/10/2018', 103) BETWEEN StartDate 
                                          AND EndDate 
    AND CONVERT(DATE, '20/10/2018', 103) BETWEEN StartDate  
                                             AND EndDate

Thanks in advance

Answer 1

It looks like you are trying to find date range intersections. But your query finds just date ranges that completely includes your date range parameter. To find the date range intersections you need to change your query to:

SELECT * 
FROM table1 
WHERE 
    CONVERT(DATE, '14/10/2018', 103) <=  EndDate 
    AND CONVERT(DATE, '21/10/2018', 103) >= StartDate

if you need all five conditions in a single query without duplicates you can combine it by OR:

...
WHERE 
   CONVERT(DATE, '14/10/2018', 103) <=  EndDate 
   AND CONVERT(DATE, '21/10/2018', 103) >= StartDate 
OR
   CONVERT(DATE, '17/10/2018', 103) <=  EndDate 
   AND CONVERT(DATE, '19/10/2018', 103) >= StartDate 
...

If you want all five conditions with duplicates you can use union all:

SELECT * 
FROM table1 
WHERE 
    CONVERT(DATE, '14/10/2018', 103) <=  EndDate 
    AND CONVERT(DATE, '21/10/2018', 103) >= StartDate 

UNION ALL

SELECT * 
FROM table1 
WHERE 
    CONVERT(DATE, '17/10/2018', 103) <=  EndDate 
    AND CONVERT(DATE, '19/10/2018', 103) >= StartDate 
...

Check Date between two date columns from two dates SQL Server

1 个答案: