Question

I’m hoping someone can answer this question about an SQL query I’m tyring to write, it’s probably fairly basic but it’s driving me nuts.

I have a table which contains data which is written every 15 minutes for some agents logged in to a telephone system. Here’s a sample of some of the fields setup, there’s more but I’m keeping things simple and quick to type

FieldName          Size  Type
BeginTimePeriodDt  93    datetime
User_Id            12    varchar
EndTimePeriodDt    93    datetime
TotalLoginTime      4    int

And a sample of what the data is. There’s a lot more agents but I’ve kept it simple again.

BeginTimePeriodDT    User_ID EndTimePeriodDt      TotalLoginTime
2012-09-10 13:30:00  XXXXXX  2012-09-10 13:45:00  35
2012-09-10 13:30:00  YYYYYY  2012-09-10 13:45:00  900
2012-09-10 13:45:00  XXXXXX  2012-09-10 14:00:00  900
2012-09-10 13:45:00  YYYYYY  2012-09-10 14:00:00  600
2012-09-10 14:00:00  XXXXXX  2012-09-10 14:15:00  250
2012-09-10 14:00:00  YYYYYY  2012-09-10 14:15:00  95
2012-09-11 13:30:00  XXXXXX  2012-09-11 13:45:00  35
2012-09-11 13:30:00  YYYYYY  2012-09-11 13:45:00  900
2012-09-11 13:45:00  XXXXXX  2012-09-11 14:00:00  900
2012-09-11 13:45:00  YYYYYY  2012-09-11 14:00:00  600
2012-09-11 14:00:00  XXXXXX  2012-09-11 14:15:00  250
2012-09-11 14:00:00  YYYYYY  2012-09-11 14:15:00  95

As you can see every agent logged in gets a record written every 15 minutes. What I’m trying to do is takes those records and add up the log in time. Now if the table only contained 1 days records per agent then it would be a very easy thing to do, but…

the table contains records for multiple days 15 minute intervals per agent 🙁

The bit I’m having the trouble with is figuring out how to group and add an agents intervals per day up and return a daily total.

So I want to end up with something like

2012-09-10 XXXXXX 1185
2012-09-11 XXXXXX 1185
2012-09-10 YYYYYY 2000
2012-09-11 YYYYYY 1300

(I know my maths don’t add up to the data above, I can’t be arsed working the sums out :-P)

I’d be much appreciated if someone could come up with an answer for me.

Answer 1

SELECT YEAR(BeginTimePeriodDT), 
       MONTH(BeginTimePeriodDT), 
       DAY(BeginTimePeriodDT), 
       User_ID, 
       SUM(TotalLoginTime)
FROM MyTable
GROUP BY YEAR(BeginTimePeriodDT), 
         MONTH(BeginTimePeriodDT), 
         DAY(BeginTimePeriodDT), 
         User_ID