How to Add Skill to All Classes L2J

[xHooKedx]

I would like to know how to add 1 skill to all classes at lvl 20.

I would like for all players to be able to use Summon Merchant Golem

ID: 831
Name: Summon Merchant Golem
Level: 1

 

[PenToy]

That can be done very easily from your database, I'm not sure if I remember correctly but read the file skill_trees.sql and I'm sure you'll figure out how this thing works.

Then add your skill id to every single 20 lvl class ID from that sql table!