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表的結構:獲取正確的數據 - 城市和省份數
ID | firm | city | province
1 | test1 | Warszawa | 1
2 | test2 | Gdańsk | 12
3 | test3 | Otwock | 1
3 | test4 | Kraków | 3
4 | test5 | Olkusz | 3
這是我的SQL查詢:
SELECT COUNT(miasto) AS cntcity, wojewodztwo, miasto FROM tabela GROUP BY wojewodztwo, miasto ORDER BY wojewodztwo
結果是:
cnt_city | province | city
6 1 Warszawa
2 1 Otwock
3 5 Kraków
7 5 Olkusz
3 12 Gdańsk
我想算「cnt_city」,或者SUM「cnt_city」 - 6 + 2 = 8,3 + 7 = 10,3我知道如何在PHP中完成這項工作,但是可以在SQL中完成這項工作嗎?如何修改上面的SQL查詢? 我想結果是這樣的:
cnt_city | province | city | cnt_firm
6 1 Warszawa | 8
2 1 Otwock | 8
3 5 Kraków | 10
7 5 Olkusz | 10
3 12 Gdańsk | 3
謝謝!窗口函數是我想要的!我的解決方案:SELECT cntcity,province,city,SUM(cntcity)OVER(partition BY province)as cnt_firm FROM(SELECT COUNT(city)AS cntcity,province,city FROM tabela GROUP BY省,市ORDER BY省)a – user2536914 2015-02-08 13:36:33