通過參數合併具有公共組的查詢

我有三個SQL查詢構建，它們對一組大約八個表起作用。這三者中的每一個在其group by子句中都有相同的參數。我試圖合併這三個查詢，以生成一個單一的輸出表，儘管我嘗試的一切似乎都打破了工作基查詢。通過參數合併具有公共組的查詢

我想看起來像一個輸出;

[heading] [query1 output column] [query2 output column] [query3 output column]

其中[heading]列是三個現有查詢的group by子句中使用的現有參數。

我意識到我展示我的newbness在這裏，雖然我卡，並在相同的錯誤畫圈的方式太多次去了各地....

編輯*

我認爲代碼片段會令人困惑，儘管這是一個稍微縮寫的版本;

SELECT 
TITLE_COUNT.index, 
COUNT (TITLE_COUNT.TTOTAL) AS TITLES, 
COUNT (AUTHOR_COUNT.TTOTAL) AS AUTHOR 
FROM(
    SELECT 
    index, title, date, 
    COUNT (*) AS TTOTAL 
    FROM (SELECT DISTINCT index, title, date FROM TableP P) P 
    GROUP BY 
    index, title, date 
    ORDER BY 
    index 
) AS TITLE_COUNT, 
(
    SELECT 
    index, 
    COUNT (*) AS TTOTAL 
    FROM (SELECT DISTINCT index, FROM TableM M) M 
    GROUP BY 
    index 
    ORDER BY 
    index 
) AS AUTHOR_COUNT 
WHERE 
TITLE_COUNT.index = AUTHOR_COUNT.index 
GROUP BY 
TITLE_COUNT.index 
;

我上面的問題是，輸出表中的計數列已經相乘。例如，站沿查詢給我的東西像

TITLE 
index count 
001  12 
002  10 
003  15 

AUTHOR 
index count 
001 2 
002 4 
003 6

雖然我上面的查詢結果

001 24 
002 40 
003 90

來源

2013-04-07 user2253562

開始有。 – 2013-04-07 03:38:46

用例和SUM函數。 Google在發佈查詢時對SQL – emaillenin 2013-04-07 03:39:30

進行了非規範化處理，因此您還應該將這些嘗試和錯誤與這些發佈在一起。 – scones 2013-04-07 03:42:46

不要重複計算：通過張貼你的SQL代碼

SELECT 
TITLE_COUNT.index, 
TITLE_COUNT.TTOTAL AS TITLES, 
AUTHOR_COUNT.TTOTAL AS AUTHOR 
FROM(
    SELECT 
    index, title, date, 
    COUNT (*) AS TTOTAL 
    FROM (SELECT DISTINCT index, title, date FROM TableP P) P 
    GROUP BY 
    index, title, date 
    ORDER BY 
    index 
) AS TITLE_COUNT 
FULL OUTER JOIN (
    SELECT 
    index, 
    COUNT (*) AS TTOTAL 
    FROM (SELECT DISTINCT index, FROM TableM M) M 
    GROUP BY 
    index 
    ORDER BY 
    index 
) AS AUTHOR_COUNT 
    ON TITLE_COUNT.index = AUTHOR_COUNT.index 
GROUP BY 
    TITLE_COUNT.index

來源

2013-04-07 04:55:56

通過參數合併具有公共組的查詢

回答

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