Question

I have a table, called Level.

id  |  level  |  points(minimum)  
-------------------------
1   |  1      |  0 
2   |  2      |  100 
3   |  3      |  200 

Let say I have 189 points, how do i check which level the user in?

EDIT:

Best answer chosen. Now I am comparing the request by adding EXPLAIN before the SELECT query, i have this result:

id  |  select_type  |  table  |  type  |  possible_keys  |  key  |  key_len  |  ref  |  rows  |  Extra
-------------------------------------------------------------------------------------------------------------
1   |    SIMPLE     |  level  |   ALL  |       NULL      |  NULL |    NULL   |  NULL |  8   |  Using where


id  |  select_type  |  table  |  type  |  possible_keys  |  key  |  key_len  |  ref  |  rows  |  Extra
-------------------------------------------------------------------------------------------------------------
1   |    SIMPLE     |  level  |   ALL  |       NULL      |  NULL |    NULL   |  NULL |  8   |  Using where; Using filesort

How do i know which one is better or faster?

Answer 1

If you’re looking for the level that the player is currently in, you want to select the maximum level with a points requirement less than the points the player currently has:

select max(level) from level where points <= 189;

This may work better if each level has a min_points and max_points amount:

id | level | min_points | max_points
------------------------------------
1  |   1   | 0          | 99
2  |   2   | 100        | 199
3  |   3   | 200        | 299

Then your query wouldn’t need to aggregate:

select * from level where min_points <= 189 && max_points > 189;

Edit: ugh, I keep messing up my SQL tonight, LOL.