Question

i have a table setup as the folowing

I am trying to write one query to return the result where status=1 confirmed =1 and user ID=specified. I want the result to dispay the user id , the name associated to that user id, the freind id and the name associated to that freind id. So far following tutorials on the web i have come up with the following query

SELECT `freinds.User ID`, `freinds.Freind ID`, `users.User`, `users.User` FROM `freinds` WHERE `User ID`= 6 INNER JOIN `users` on `users.ID`=6 AND `users.ID`=`freinds.Freind ID`

However i am getting an sql error with this query. I think what i am supposed to do is Inner join the user table twice but i am not exactly sure as to how to do it

Answer 1

the problem is you have wrap the tablename and columnname with backtick as a whole. you need to separate it, or if the name is not on `MySQL Reserved Keywords, remove the backticks.

You also need to join the table User twice so you can get the names for each ID on table Freinds.

SELECT  a.`User ID`, 
        a.`Freind ID`, 
        b.User FriendName,
        c.User UserName
FROM    `freinds` a
        INNER JOIN `users` b 
            ON b.ID = a.`Freind ID`
        INNER JOIN users c
            ON c.id = a.`user ID`
WHERE   `User ID`= 6 

As a sidenote, if one of the ID is nullable, LEFT JOIN is preferred than INNER JOIN.

To fully gain knowledge about joins, kindly visit the link below:

• Visual Representation of SQL Joins