SQL command to change GM levels.

[controlsx2]

Im using commade overide table to give all normal players ability to port to mall. So ive set account creation page to make all all players now in this new gorup "L" but i already have another 250ish accounts that need updating. Can somone make me a quiery for sql that does

"Insert in table `accounts` value `L` in column `gm` where current value = ``"

Something like that xD ^^

[TheSpidey]

UPDATE `accounts` SET `gm`="L" WHERE `gm` = "" OR `gm` = "0";