Question

I have this query..

SELECT DATE_FORMAT(utcdt,GET_FORMAT(DATE,'ISO')) as utcdt, 
                HOUR(utcdt) as hour, 
                country,
                sum(impressions) as impressions 
                FROM rtb_impressions where campaign_id='cid2204184260'
                GROUP BY utcdt, hour, country

These are the results…..

{'impressions': Decimal('1'), 'country': 'US', 'hour': 10L, 'utcdt': '2012-10-01'}
{'impressions': Decimal('40000'), 'country': 'US', 'hour': 9L, 'utcdt': '2012-10-02'}
{'impressions': Decimal('20000'), 'country': 'US', 'hour': 9L, 'utcdt': '2012-10-02'}

Why did I get three rows when I should have gotten 2? 012-10-02 should have been summed.

Thanks

Answer 1

You are getting that because you are grouping by the wrong value.
Try this instead:

SELECT DATE_FORMAT(utcdt,GET_FORMAT(DATE,'ISO')) as utcdt, 
            HOUR(utcdt) as hour, 
            country,
            sum(impressions) as impressions 
            FROM rtb_impressions where campaign_id='cid2204184260'
            GROUP BY DATE_FORMAT(utcdt,GET_FORMAT(DATE,'ISO')), hour, country