Group By with date column in the having clause

Question

customer    price   date
123         100     1-Jan-15
321         200     2-Jan-15
123         10      3-Jan-15
123         50      4-Jan-15
321         150     5-Jan-15
123         100     6-Jan-15
123         300     7-Jan-15
321         500     8-Jan-15
123         700     9-Jan-15

I would like to take see SUM(Price) between dates 3-Jan and 7-Jan group by customer

Something like:

select customer,sum(price) from table group by customer 
having date between 3-Jan-2015 and 8-Jan-2015 

This prompts me to have date either in the select or group by clause. When I include it, it groups by Date also.

Desired output is:

123 460

Answer 1

The HAVING clause filters results after the grouping and aggregation, so in order to do this any fields you want in the HAVING clause must be in the GROUP BY or SELECT lists. The WHERE clause filters the rows before doing the grouping and aggregation.

To get the results you want, simply move the date between... condition into a WHERE clause:

SELECT customer,SUM(price)
  FROM table
  WHERE date BETWEEN 3-Jan-2015 AND 8-Jan-2015
  GROUP BY customer