Find the ID of a MySQL row based on another field

Question

I have a line in MySQL with information like the username and email address and I would like to find the id of the row based on the username field. Any ideas on how to find the id based on the username field?

Answer 1

SELECT id FROM users WHERE username = 'NStorm';

Answer 2

这是非常基本的sql：

select id from your_table where username = 'foo'