Question

I’m trying to query my reward database to work out how many points members of staff have allocated in total and this week.

The query that I’m using to work out the total points a teacher has allocated is as follows:

SELECT  `Giver_ID` , SUM(  `Points` ) AS TotalPoints
FROM  `transactions` 
GROUP BY  `Giver_ID` 
ORDER BY  `Giver_ID` ASC 

The query that I’m using to work out weekly allocations is very similar:

SELECT  `Giver_ID` , SUM(  `Points` ) AS WeeklyPoints
FROM  `transactions`
WHERE ( `Datetime` >= '2012-09-24' AND `Datetime` <= '2012-09-30' )
GROUP BY  `Giver_ID` 
ORDER BY  `Giver_ID` ASC 

My question is this: is it possible to combine the queries to produce Giver_ID, TotalPoints and WeeklyPoints from a single query?

Thanks in advance,

Answer 1

Yes, it is possible –

SELECT
  Giver_ID,
  SUM(Points) AS TotalPoints,
  SUM(IF(Datetime >= '2012-09-24' AND Datetime <= '2012-09-30', Points, NULL)) AS WeeklyPoints
FROM transactions
GROUP BY Giver_ID