我是PHP + MySql noob）如何在mysql中选择数据进行查询

Question

User send to site acesskey, in MySql in table users there is his data(id, name, acesskey, friends). How to select he ID and echo from table messages all message where id_from = id?

Answer 1

Basically, you need to combine 2 select query results. Try looking at this. It might explain everything.

JOIN two SELECT statement results