Mysql 基于用户登录的表中的数据库连接查询

Question

I have 2 mysql tables - websites and files . I am expecting the end result table to show me all the website id's for each user logged in and to show the correct filename against them.

I tried the following:

SELECT w1.websites_id ,w1.name ,f1.file_name ,f1.user_id
FROM websites w1 
LEFT JOIN files f1 ON f1.websites_id=w1.websites_id

My current output is as below

websites_id | websites_name |uploaded_user| file_name
----------------------------------------------------
1           | abc.com      | user1        | test.png
2           | 123.com      | user1        | start.png
2           | 123.com      | user2        | fast.png4
----------------------------------------------------

Website1 (abc.com) for user 2 need to show up in my end table but not able to get that

-----------------------------
Websites_id | websites_name |
1           | abc.com       |
2           | 123.com       |
----------------------------

Files Table
-----------------------------
Files_name | websites_id  | uploaded_user|
------------------------------------------
test.png   |  1            | user1
start.png  |  2            | user1
fast.png    | 2            |  user2
------------------------------------------

I need expected output as

websites_id | websites_name |uploaded_user| file_name
----------------------------------------------------
1           | abc.com      | user1        | test.png
2           | 123.com      | user1        | start.png
1           | abc.com      | user2        | null
2           | 123.com      | user2        | fast.png
1           | abc.com      | user3        | null
2           | 123.com      | user3        | null

Answer 1

Can you try running like this by using INNER JOIN Query

select w1.websites_id,w1.name,f1.file_name,f1.user_id from websites w1 INNER JOIN files f1 ON f1.websites_id=w1.websites_id