Hi,

Does queries become slower when you type them like this:

SELECT concat(U.Firstname, ' ', U.Lastname) AS 'Full Name', L.Username FROM tbusers U, tblogin L WHERE U.ID = L.UserID AND L.iActive = 1

rather than typing them out fully like this:

SELECT concat(tbusers.Firstname, ' ', tbusers.Lastname) AS 'Full Name', tblogin.Username FROM tbusers JOIN tblogin on tbusers.ID = tblogin.UserID WHERE tblogin.iActive = 1

And why are there 2 ways to do the same query ?

1. no, there is no difference in speed, but there is a dramatic increase in understandability

besides, you confused two questions into one: use of longer table aliases, and use of JOIN syntax

2. actually, there are more than 2 ways to do the same query