INNER JOIN以及更多AND

Question

我有2個表格。

table one: items 
table two: items_options 

現在我需要在表中的兩個

SELECT i.id FROM items as i 
INNER JOIN items_options as io ON i.item_id = i.id 
WHERE io.option_id = 60143 AND io.option_id = 60142 
ORDER BY i.xy ASC LIMIT 0,50 

我如何通過/有做沒有組2個options_ids搜索？

Answer 1

好像你要OR或使用IN聲明。

SELECT i.id 
    FROM items as i 
INNER JOIN items_options as io 
    ON i.item_id = i.id 
WHERE io.option_id IN (60143, 60142) 
ORDER BY i.xy ASC 
LIMIT 0,50 

OR

SELECT i.id 
FROM items as i 
INNER JOIN items_options as io 
    ON i.item_id = i.id 
WHERE io.option_id = 60143 OR io.option_id = 60142 
ORDER BY i.xy ASC 
LIMIT 0,50 

你不能有一個具有兩個值的option_id。

編輯：如果你想這兩個值可以使用UNION ALL查詢：

SELECT x.id 
FROM 
(
    SELECT i.id, i.xy 
    FROM items as i 
    INNER JOIN items_options as io 
    ON i.item_id = i.id 
    WHERE io.option_id = 60143 
    UNION ALL 
    SELECT i.id, i.xy 
    FROM items as i 
    INNER JOIN items_options as io 
    ON i.item_id = i.id 
    WHERE io.option_id = 60142 
) x 
ORDER BY i.xy ASC 
LIMIT 0,50 

或者你可以嘗試加入的items_options表兩次：

SELECT i.id 
FROM items as i 
INNER JOIN items_options as io1 
    ON i.item_id = io1.id 
INNER JOIN items_options as io2 
    ON i.item_id = io2.id 
WHERE io1.option_id = 60143 AND io2.option_id = 60142 
ORDER BY i.xy ASC 
LIMIT 0,50 

Answer 2

看起來你想要一個OR來代替AND。 items_options中不會有滿足這兩個條件的任何行。

WHERE io.option_id = 60143 OR io.option_id = 60142 
          ^^ 

另外，

WHERE io.option_id IN (60143,60142) 

---

你提到不想使用GROUP BY。這聽起來好像你不想返回重複的items.id值。你可以在選擇列表前加DISTINCT關鍵字來消除重複：

SELECT DISTINCT i.id FROM items as i 

Answer 3

也許工作更好地使用OR而不是AND。 AND表明這兩種情況可能同時發生。由於您正在查找具有option_id = 60143的行以及具有option_id = 60142的行，因此使用OR可以獲得具有其中任一個的行。

SELECT i.id FROM items as i 
INNER JOIN items_options as io ON i.item_id = i.id 
WHERE io.option_id = 60143 OR io.option_id = 60142 
ORDER BY i.xy ASC LIMIT 0,50