Question

I am trying to generate simple report which gives me Failed test count daily for whole month. Is there a way to write a sql query that does that? Rather then running queries by changing dates? This is what i am doing:

select count (*) from students where Message Like 'Failed Test.%'
and Timestamp > '01-01-2013' and Timestamp < '01-02-2013'

So above query gives me count 5. Then i change the date from 01-01 to 01-02 and get next days count and so on. But this seems like very time consuming thing. Just checking if there is a better way to do that.

Answer 1

This gives counts grouped by day for a month’s date range:

select cast(timestamp as date) as [Date], count (*) as NumFailedTests
from students 
where Message Like 'Failed Test.%'
and Timestamp between '2013-01-01' and '2013-01-31'
group by cast(timestamp as date)
order by cast(timestamp as date)

You can obviously widen the date range…

[Hopefully the ‘timestamp’ column is not really a timestamp…]