MYSQL加入所有表並獲得2值之間的字段記錄？

Question

我有這個疑問，運作良好，這一起加入了幾個表，這都沒有問題，運作良好

"SELECT post_info.post_id,username,profile_image_path,status_body,image_path,post_created_at FROM post_info 
LEFT OUTER JOIN users_info ON post_info.user_id = users_info.user_id 
LEFT OUTER JOIN status_of_post ON post_info.status_id = status_of_post.status_id 
LEFT OUTER JOIN image_of_post ON post_info.image_id =image_of_post.image_id" 

我想要得到的記錄（POST_ID + 1）和（POST_ID + 20） ，所以我修改它成爲這個

SELECT post_info.post_id,username,profile_image_path,status_body,image_path,post_created_at FROM post_info 
LEFT OUTER JOIN users_info ON post_info.user_id = users_info.user_id 
LEFT OUTER JOIN status_of_post ON post_info.status_id = status_of_post.status_id 
LEFT OUTER JOIN image_of_post ON post_info.image_id =image_of_post.image_id 
WHERE post_id BETWEEN (post_id + 1) AND (post_id + 20) 

它陳述了這個結果。

1046 - 無數據庫中選擇

我想每次20後查詢運行的基礎上，post_id的範圍內，是什麼做的正確方法？

Answer 1

用於在phpMyAdmin

OR

選擇確保您正在運行的查詢數據庫

您可以更改您的查詢，包括數據庫名是這樣的：

SELECT ..... FROM DATABASE-Name.post_info