SELECT CONCAT(usrFirstname,'',usrSurname) As FullName,
usrNickname AS Nickname,
usrEmail As EmailAddress,
CASE WHEN usrGender = 0
THEN
'M'
ELSE
'F'
END AS Gender,
DATE_FORMAT(usrDOB,'%d%m%y') As DOB,usrBelt AS BeltId
FROM user
jeśli umieścisz to w zapytaniu, zwróci M lub F
