How can I display multiple column records in the same row?

Question

I want to display all related information in to the same row column. Currently my output and query are the following:

Trader	Items
Prapor	Weapons
Prapor	Wearables
Prapor	Weapon Modifications
Prapor	Health and Buffs
Therapist	Weapons
Therapist	Wearables
Therapist	Weapon Modifications
Therapist	Health and Buffs

select NPC_Traders.Nickname as Trader, Classes.Class as Items
from NPC_Traders, Classes
where Items IN (
           select npc.Tradeables
           from NPC_Traders npc 
           where npc.Tradeables LIKE '%1%' OR
                 npc.Tradeables LIKE '%2%' OR
                 npc.Tradeables LIKE '%3%' OR
                                npc.Tradeables LIKE '%4%');

I want to display the information such as:

Trader	Items
Prapor	Weapons, Wearables, Weapon Modifications, Health and Buffs
Therapist	Weapons, Wearables, Weapon Modifications, Health and Buffs

Is there a technique I can use to solve this issue?

Answer 1

You can apply the GROUP_CONCAT function on top of your existing query like so:

SELECT Trader, GROUP_CONCAT(Items, ',') AS Items
FROM 
(
    select NPC_Traders.Nickname as Trader, Classes.Class as Items
    from NPC_Traders, Classes
    where Items IN (
               select npc.Tradeables
               from NPC_Traders npc 
               where npc.Tradeables LIKE '%1%' OR
                     npc.Tradeables LIKE '%2%' OR
                     npc.Tradeables LIKE '%3%' OR
                                    npc.Tradeables LIKE '%4%')
) AS Subquery