Question

I have a database table of keys, let’s say about 200 keys in the table.

table keys: id | keys | sent

Every time a key is sent, the row of the key sent will equal to true.

I want to do a query that check the table. If the table keys has 10% keys left, an email will be sent to my boss to allow him to put more keys in the database.

I am newbie with sql. Should I do a query of join table or count row??

Any help or suggestion?

Answer 1

SELECT COUNT(id) AS total_keys, SUM(IF(sent, 1, 0)) AS used_keys
FROM yourtable