Let's say I want my BigChest and my LittleChest to spawn at point B, but only one of them at a time.
BigChest have a GuID of 102030, LittleChest have a GuID of 405060.
I go into Pool_Template and add a Row,
Entry I can set whatever I want, let's set 99000 for this exemple,
MaxLimit I set 1, since I only want 1 Chest to be visible at a time.
Description, whatever I want, I just want keep it clear, it's helpful when there is a lot of them.
Now, I can go into Pool_Gameobject and add a Row,
GUID will be the first chest (the first is arbitrary, no impact on the final result) so 102030.
PoolEntry is the Entry of the Pool_Template I did earlier, so 99000.
Chances is a little bit trickier, but we're going to keep it simple, let's say I only have two chest, so I'll cut the 100% dropchance in two, so I set it to 50.
Description, I will add "BigChest entry for 99000" to keep it clear.
I add another row and do the exact same thing except for the GuID (we will add 405060 instead) and the Description ("LittleChest entry for 99000")
Once it's done, I can go into the GameObject table and look for my two chests with the corresponding GuID and I set the spawntimesecs at something like 900 so the chests will be able to respawn every 15 minutes.
Now I can restart the server and only one chest will be lootable !