Question

I am using SQL Server 2008, I have time column (varchar) with time intervals 10 min basis. I want to display the time with half and hour basis..

The table (timeslot) has this data:

time
-----
11:10 AM
11:20 AM
11:30 AM
11:40 AM
11:50 AM
12:00 PM
12:10 PM
12:20 PM
12:30 PM
12:40 PM
12:50 PM
01:00 PM
01:10 PM
01:20 PM

And I want to display this output:

time
-----
11:00 AM
11:30 AM
12:00 PM
12:30 PM
01:00 PM
01:30 PM

Can anybody help me on this? thanks in advance…

Answer 1

Try something like this:

SELECT 
    (list of columns)
FROM 
    dbo.YourTableWithTheTime
WHERE 
    DATEPART(MINUTE, CAST(YourTimeColumnHere as TIME)) IN (0, 30)

Of course – if you used the appropriate datatype of TIME for your column in the first place, you could save yourself the CAST(.. as TIME) construct and things would be even easier….

Update: if you need to order by your time – use this:

SELECT 
    DISTINCT [time]
FROM 
    dbo.YourTableWithTheTime
WHERE 
    DATEPART(MINUTE, CAST([time] as TIME)) IN (0, 30)
ORDER BY
    CAST([time] as TIME)

PS: it’s also a really bad idea to name a column time – since that’s a reserved keyword (for the datatype) in SQL Server 2008 …..