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Editorial Team
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Asked: 2026-05-28T04:45:05+00:00

This is a follow-up to a previous questions I asked: Using a GROUP BY

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This is a follow-up to a previous questions I asked: Using a GROUP BY statement to sum rows. I have a table with sales of different currencies, and I am using a GROUP BY statement to sum up the numbers per title.

mysql> SELECT
       title, 
       SUM(us_earnings_usd) AS usd,
       SUM(cad_earnings_cad) AS cad,
       SUM(uk_earnings_gbp) AS gbp,
       SUM(swedish_earnings_skk) AS skk
       FROM raw_financials 
       WHERE date="2012-12-01"
       GROUP BY title

+--------+-----------------+------------------+------------------+------------------+
| title  | us_earnings_usd | cad_earnings_cad |swedish_earnings_ |  uk_earnings_gbp |
+--------+-----------------+------------------+------------------+------------------+
| Gamers |          7.7500 |           4.0000 |           1.0000 |           2.0000 |
+--------+-----------------+------------------+------------------+------------------+

Finally, I need to sum up the fields to get the total sales in USD. For this, I have an additional table called exchange_rates. This is how it can be queried:

mysql> SELECT currency, conversion_to_usd FROM exchange_rates WHERE date="2011-12-01";

+----------+-------------------+
| currency | conversion_to_usd |
+----------+-------------------+
| AUD      |           0.98542 |
| CAD      |           0.95940 |
| CHF      |           1.05235 |
| DKK      |           0.17372 |
| EUR      |           1.29400 |
| GBP      |           1.54223 |
| NOK      |           0.16579 |
| NZD      |           0.74442 |
| SEK      |           0.14190 |
| USD      |           1.00000 |
+----------+-------------------+

How would I combine these using SQL to get:

total_earnings_in_usd = 7.75 (earnings in usd) *1.00 (conversion from usd to usd) 
                        + 4.00 (earnings in cad) *0.95 (conversion from cad to usd) 
                        + 1.00 (earnings in sek) *0.14 (conversion from sek to usd)
                        + 2.00 (earnings in gbp) *1.54 (conversion from gbp to usd) 
                      = $14.77 USD

Update: I have updated the SQL in the question.

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1 Answer

  1. Editorial Team

    UPDATED FOLLOWING COMMENT

    SELECT  title, 
        partner_share_currency,
        SUM(us_earnings_usd) AS usd,
        SUM(cad_earnings_cad) AS cad,
        SUM(us_earnings_usd) + SUM(cad_earnings_cad*CAD) +
        SUM(uk_earnings_gbp*GBP) + SUM(swedish_earnings_skk*SEK) total_earnings_in_usd
FROM raw_financials rf
LEFT JOIN ( SELECT  date, 
                    MIN(CASE WHEN  currency = 'CAD' THEN conversion_to_usd END) CAD,
                    MIN(CASE WHEN  currency = 'GBP' THEN conversion_to_usd END) GBP,
                    MIN(CASE WHEN  currency = 'SEK' THEN conversion_to_usd END) SEK
            FROM exchange_rates 
            WHERE currency IN ('CAD','GBP','SEK')
            GROUP BY date) er
ON rf.date = er.date
WHERE title LIKE '%Gamers%' AND rf.date= '2012-12-01'
GROUP BY title
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