Question

What I’d like to do is for a gaming application I need to search for my non player characters and they have a field called target_id that stores the id of whatever they are chasing.

given:
table mobs with fields and some example data
id   x   y   target_id
1    1   1   2
2    3   3   1

I would like to return the following data with a query

id   x   y   target_id target_x target_y
1    1   1   2         3        3
2    3   3   1         1        1

This is what I tried but it has syntax errors

SELECT id,x,y,target_id, target.x, target.y FROM mobs LEFT JOIN mobs AS target ON      target_id=id FROM mobs WHERE 1

Answer 1

I don’t know why you have a WHERE 1 or the second FROM, but I believe that this is what you want:

SELECT M.id, M.x, M.y, M.target_id, T.x, T.y 
FROM mobs AS M
LEFT JOIN mobs AS T 
ON M.target_id = T.id 

In the future, you should post your table definition, and the expected result so your question is more clear.