How I can use this script with SQL fuction

[Ghazer]

How I can use this script with SQL "update players set mag_level = 60" because that set magic level to 60...
and doPlayerAddMagLevel add one by one and that produce lag

I create that can you repair or optmize please?

function onLogin(cid)
    if getPlayerVocation(cid) == 1 or getPlayerVocation(cid) == 2 or getPlayerVocation(cid) == 5 or getPlayerVocation(cid) == 6 then
	    doRemoveCreature(cid)
        db.query('UPDATE `players` SET `mag_level` = 60 WHERE `name` = ' .. getPlayerName(cid) .. ';')
        getPlayerStorageValue(cid, 56364)
    end
    return true
end

When I use i have this error