Mysql query slow performance

Question

I have a table with 500k rows. I have specific table which takes really long time to run every query.

One of the queries is:

SELECT * 

FROM player_data

WHERE  `user_id` =  '61120'

  AND  `opzak` =  'ja'

ORDER BY opzak_nummer ASC

the

opzak_nummer

column is a

tinyint

with a number.

EXPLAIN:

Is there any way to improve this query performance and the general of this query/table?

The table name is player_data and includes about 25 columns, most of them are integers with values of stats.

The index is

id

AUTO_INCREMENT.

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Answer 1

You need to run that query, it will alter table and add index. You can read more details here http://dev.mysql.com/doc/refman/5.7/en/drop-index.html

ALTER TABLE pokemon_speler ADD INDEX index_name (user_id, opzak);

Mysql query slow performance

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