MySQL的多列遞增順序

Question

我試圖運行此查詢按升序排列：

SELECT title,project_index 
FROM projectdetail 
WHERE project_index BETWEEN 1 AND 6 
ORDER BY title, project_index ASC; 

我需要按升序排列兩列，但上面的查詢返回結果與ASC以便只有一列。

Answer 1

如果您使用的是mysql，請檢查this。

正如他們說有，你可以使用SELECT * FROM t1 ORDER BY key_part1 DESC, key_part2 ASC;

Answer 2

升序是默認對於大多數（如果不是全部） DBMS的所以你的說法是種在這方面怪異但儘管如此，你可以通過向其添加說明符ASC或DESC來爲每個單獨列指定一個訂單。然後

你的聲明將成爲

SELECT title 
     , project_index 
FROM projectdetail 
WHERE project_index BETWEEN 1 AND 6 
ORDER BY 
     title ASC 
     , project_index ASC 

編輯

正如@Arvo & @Dems被提及，目前正在排序第一上title以及有關project_index相同的標題。如果您希望project_index先排序，則必須先將其置於ORDER BY子句中。

你的說法就變成

SELECT title 
     , project_index 
FROM projectdetail 
WHERE project_index BETWEEN 1 AND 6 
ORDER BY 
     project_index ASC 
     , title ASC 

因爲ASC是默認的排序順序，則可以省略這些產品總數

SELECT title 
     , project_index 
FROM projectdetail 
WHERE project_index BETWEEN 1 AND 6 
ORDER BY 
     project_index 
     , title 

Answer 3

您嘗試按升序排列兩列進行排序。在MySQL中，您可以在查詢中使用多個順序。但是在這裏，訂單的偏好非常重要。第一個獲得最多的偏好，第二個獲得第二個偏好。
這意味着，您所查詢的是

SELECT title,project_index FROM projectdetail 
    WHERE project_index BETWEEN 1 AND 6 ORDER BY title, project_index ASC; 

其中，爲了用標題了第一選擇。 mysql將首先按升序排列「標題」列並顯示結果。那麼只有它會命令'project_index'列。所以你無法得到你想要的答案。

Answer 4

試試這個：

SELECT title, project_index 
FROM projectdetail 
WHERE project_index BETWEEN 1 AND 6 
ORDER BY project_index, title; 

Answer 5

你可以用下面的嘗試和check--

SELECT title,project_index 
FROM projectdetail 
WHERE project_index BETWEEN 1 AND 6 
ORDER BY title, project_index 

Answer 6

根據您的要求/查詢我認爲這是不可能做到的訂貨超過2列在同一張桌子裏。如果你想根據價值進行訂購，你可以這樣做。

SELECT lat,lon, title, zip, city, state, region,cantone 
FROM company 
WHERE title != '' AND state IN(1,3,4,5,6,7,9,2) 
ORDER BY state=2,title asc 

在上面的查詢中，它將首先顯示除state = 2之外的所有標題，然後顯示state = 2的所有記錄。

Answer 7

ORDER BY標題ASC，project_index ASC;

SELECT title,project_index 
FROM projectdetail 
WHERE project_index BETWEEN 1 AND 6 
ORDER BY title ASC, project_index ASC; 

，你可以添加喜歡ORDER BY col1 ASC, col2 ASC, col3 DESC;

Answer 8

使用

ORDER BY title ASC,project_index ASC 

，而不是

ORDER BY title, project_index ASC; 

多個列，分離得到的訂單都那麼它會正常工作。

Answer 9

你可以試試：

SELECT title, project_index FROM projectdetail 
ORDER BY title ASC, project_index DESC