Question

OK I’m using MS SQL and I have a table with values like this:

ID     Date     Radio     Time 111    4/1/09    1        3:00:00 111    4/1/09    2        4:00:00 111    4/1/09    3       14:00:00 111    4/1/09    1       15:00:00 111    4/1/09    3       16:00:00 222    4/1/09    2        2:00:00 222    4/1/09    1        5:00:00 222    4/1/09    1       19:00:00 333    4/1/09    1        3:00:00 333    4/1/09    2        5:00:00 333    4/1/09    2        13:00:00 333    4/1/09    3        17:00:00 

Ok so I need a Query where:

window 1 < 12:00 13 < window 2 < 15:00 window 3 > 16:00 

To return sums:

           Window1     Window2    Window3   Radio 1:     3           0          2 Radio 2:     3           1          0 Radio 3:     0           1          2          

I have tried using count() but I cannot get these to join correctly on the right ‘radio’ Any suggestions?

Answer 1

SELECT [Radio],     SUM(CASE WHEN [Time] < 12 THEN 1 ELSE 0 END) AS Window1,     SUM(CASE WHEN [Time] >= 12 AND [TIME] < 15 THEN 1 ELSE 0 END) AS Window2,     SUM(CASE WHEN [Time] >= 16 THEN 1 ELSE 0 END) AS Window3 FROM [Table] GROUP BY [Radio] 

Adjust <= / < and >= / > as appropriate; you weren’t very specific on that point.

Also, your first condition was window 1 > 12. I’m assuming you mean window 1 < 12.