它是聯盟，還是或？

我已經嘗試了所有，有沒有其他的語法，將工作？我有以下它是聯盟，還是或？

SELECT `ID` , `Home_Team` 
FROM `FixturesDates` where `ID` = 
    (SELECT `ID` 
    FROM `FixturesDates` 
    WHERE `Home_Team`  
     REGEXP 'saturday|sunday|monday|tuesday|wednesday|thursday|friday' 
    order by ID asc LIMIT 1)

這個作品，

我也有

SELECT `ID` , `Home_Team` 
FROM `FixturesDates` 
where `ID` = 
    (SELECT `ID` FROM `FixturesDates` WHERE `Home_Team` 
    REGEXP 'saturday|sunday|monday|tuesday|wednesday|thursday|friday' 
    order by ID asc LIMIT 1,1)

這也適用，但即時通訊無法將2相結合，試圖

SELECT `ID` , `Home_Team` 
FROM `FixturesDates` 
where `ID` = 
    (SELECT `ID` FROM `FixturesDates` WHERE `Home_Team` 
    REGEXP 'saturday|sunday|monday|tuesday|wednesday|thursday|friday' 
    order by ID asc LIMIT 1) 
UNION 
    (SELECT `ID` FROM `FixturesDates` WHERE `Home_Team` 
    REGEXP 'saturday|sunday|monday|tuesday|wednesday|thursday|friday' 
    order by ID asc LIMIT 1,1)

但這不起作用，AND和OR也不起作用。有什麼其他的嗎？

謝謝

來源

2013-04-27 Mike

你不能合併它們，因爲它們有不同的列。

嘗試增加NULL或Home_Team到第二子查詢：

SELECT `ID` , `Home_Team` 
FROM `FixturesDates` 
where `ID` = 
    (SELECT `ID` FROM `FixturesDates` WHERE `Home_Team` 
    REGEXP 'saturday|sunday|monday|tuesday|wednesday|thursday|friday' 
    order by ID asc LIMIT 1) 
UNION 
    (SELECT `ID`, NULL as Home_Team FROM `FixturesDates` WHERE `Home_Team` 
    REGEXP 'saturday|sunday|monday|tuesday|wednesday|thursday|friday' 
    order by ID asc LIMIT 1,1)

或者更簡單地說：

SELECT `ID` , `Home_Team` 
FROM `FixturesDates` 
where `ID` in 
    (SELECT `ID` FROM `FixturesDates` WHERE `Home_Team` 
    REGEXP 'saturday|sunday|monday|tuesday|wednesday|thursday|friday' 
    order by ID asc LIMIT 2)

這是基於相同的查詢。也許你的意思是這樣：

SELECT `ID` , `Home_Team` 
FROM `FixturesDates` 
where `ID` = 
    (SELECT `ID` FROM `FixturesDates` WHERE `Home_Team` 
    REGEXP 'saturday|sunday|monday|tuesday|wednesday|thursday|friday' 
    order by ID asc LIMIT 1) 
    OR ID = 
    (SELECT `ID`, NULL as Home_Team FROM `FixturesDates` WHERE `Home_Team` 
    REGEXP 'saturday|sunday|monday|tuesday|wednesday|thursday|friday' 
    order by ID asc LIMIT 1,1)

你的兩個原始查詢的正確聯盟將包括全查詢：

SELECT `ID` , `Home_Team` 
FROM `FixturesDates` where `ID` = 
    (SELECT `ID` 
    FROM `FixturesDates` 
    WHERE `Home_Team`  
     REGEXP 'saturday|sunday|monday|tuesday|wednesday|thursday|friday' 
    order by ID asc LIMIT 1) 
union 
SELECT `ID` , `Home_Team` 
FROM `FixturesDates` 
where `ID` = 
    (SELECT `ID` FROM `FixturesDates` WHERE `Home_Team` 
    REGEXP 'saturday|sunday|monday|tuesday|wednesday|thursday|friday' 
    order by ID asc LIMIT 1,1)

來源

2013-04-27 16:46:57

第一個應該工作作爲列不爲空，可以看到單獨運行查詢的第二部分，所以我不知道它爲什麼說NULL，但是你發佈的最後一個查詢是完美的。謝謝 – Mike 2013-04-27 17:07:05

@Mike。。。我現在意識到你打算在'where'子句中做'union'。爲此，您需要一組額外的parens：'（（select ...）union（select ...））'中的id。 'union'適用於整個查詢。 – 2013-04-27 17:19:13

完美，謝謝。 – Mike 2013-04-27 17:47:10

它是聯盟，還是或？

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