选择以分钟为单位的日期时间差，该时间差小于特定的分钟数

Question

I have a query like this:

SELECT DATEDIFF(minute,t.Paydate,t.DelDate) as Mtime 
       FROM Transaction_tbl t WHERE Locid=6 

This will return result like:

Mtime
8
2
10
20
15
7
6

But, in that query I have to give condition like I want to show result like less than 10 minutes or less than 15 minutes only . I have one more table which is location . In that, I have a column timeinterval with data type Time(0) . Actually this value I want to pass in the same query. So how I can re-write my query showing result less than 10 minutes?

Answer 1

Add AND condition in WHERE clause :

SELECT  
    DATEDIFF(MINUTE, t.Paydate, t.DelDate) AS Mtime 
FROM Transaction_tbl t 
WHERE 
    Locid = 6
    AND DATEDIFF(MINUTE,t.Paydate,t.DelDate) < 10

As per your new doubt:

SELECT  
    DATEDIFF(MINUTE, t.Paydate, t.DelDate) AS Mtime,
    COUNT(*) AS Count 
FROM Transaction_tbl t 
WHERE 
    Locid = 6
GROUP BY Mtime
HAVING DATEDIFF(MINUTE, t.Paydate, t.DelDate) < 10

you can do something like this

SELECT  
   case when ( DATEDIFF(MINUTE, t.Paydate, t.DelDate)<10) then DATEDIFF(MINUTE, t.Paydate, t.DelDate) else null end AS lessthan10,
case when ( DATEDIFF(MINUTE, t.Paydate, t.DelDate)>10) then DATEDIFF(MINUTE, t.Paydate, t.DelDate) else null end AS greaterthan10,
    COUNT(*) AS Count 
FROM Transaction_tbl t 
WHERE 
    Locid = 6
GROUP BY Mtime
HAVING DATEDIFF(MINUTE, t.Paydate, t.DelDate) < 10

Answer 2

Try this.

WITH CTE(Mtime) As (
select DATEDIFF(minute,t.Paydate,t.DelDate) as Mtime 
from Transaction_tbl  t
)
Select Mtime from 
CTE
Where Mtime < 10

Reference : Using Common Table Expressions