如何從兩個查詢中只返回一個查詢結果

Question

我現在擁有的sql查詢如下。我嘗試了一些聯合查詢，但他們沒有工作。

Select file_path 
from images 
where image_id In (
    Select image_id 
    from temp_images 
    where object_uid IN (
    Select object_uid 
    from object_table 
    where object_status = 2 and object_place like "%some_keyword%"))` 


Select object_uid, object_utitle 
from object_table 
where object_status = 2 and object_place like "%some_keyword%"` 

這兩個查詢可能會返回很多行。我想這樣返回file_path和object_uid。

-Image_id | Object_uid | Object_utitle

-img1 | obj1 |標題1

-img2 | obj2 |標題2

-img2 | obj2 |標題3

有沒有辦法做到這一點？

Answer 1

試試這個：

Select a.file_path, b.object_uid, b.object_utitle 
from images a, (Select object_uid, object_utitle 
    from object_table 
    where object_status = 2 and object_place like "%some_keyword%") b 
where image_id In (
    Select image_id 
    from temp_images 
    where object_uid IN (b.object_uid)) 

Answer 2

Select object_uid, object_utitle from object_table where object_status = 2 and object_place like "%some_keyword%" LIMIT 0,1 

它將只選擇一個條目，根據您要顯示的內容添加ORDER BY DESC/ASC。

Answer 3

您只需連接表。

Select i.Image_id , i.file_path , o.object_uid 
    FROM images i 
    INNER JOIN temp_images t ON t.image_id = i.image_id 
    INNER JOIN object_table o ON o.object_uid = t.object_uid 
    WHERE object_status = 2 and object_place like "%some_keyword%" 

Answer 4

使用多個內部連接，你應該嘗試類似的東西：

SELECT imgs.image_id, obj.object_uid, obj.object_utitle 
    FROM images AS imgs 
INNER JOIN temp_images AS tmp_imgs 
    ON tmp_imgs.image_id = imgs.image_id 
INNER JOIN object_table AS obj 
    ON tmp_imgs.object_uid = obj.object_uid 
WHERE obj.object_status = 2 
    AND obj.object_place LIKE "%some_keyword%"