How to specify the parent query field from within a subquery in mySQL?

Question

Is there a way to specify the parent query field from within a subquery in mySQL?

For Example:
I have written a basic Bulletin Board type progra

Answer 1

Parent query field within a subquery in MySQL 8.

I'm selecing games scores on the basis of username from tblgamescores using nested query.

SELECT 
    GameScoresID, 
    (SELECT Username FROM tblaccounts WHERE AccountID = FromAccountID) AS FromUsername, 
    (SELECT Username FROM tblaccounts WHERE AccountID = ToAccountID) AS ToUsername,
    (SELECT Username FROM tblaccounts WHERE AccountID = WinAccountID) AS WinUsername,
    (SELECT Username FROM tblaccounts WHERE AccountID = LossAccountID) AS LossUsername,
    FromUserScore,
    ToUserScore 
FROM tblgamescores a 
WHERE FromAccountID = (SELECT AccountID FROM tblaccounts WHERE Username = "MHamzaRajput");