mysql Selecting from two different tables.

Question

$sql = \"select body, stamp from posts where user_id = \'$userid\' order by stamp desc\";

NOTE: the above query works fine. What I want to do is also s

Answer 1

You can use table name to select the columns. Ex:

$Query = "select table1.body, table1.stamp, users.username from posts, users where user_id = '$userid' order by stamp desc";

But, this method is not good in performance.

The best method is:

$Query = "SELECT table1.body, table1.stamp, users.username 
FROM posts 
INNER/LEFT/RIGHT JOIN users 
ON users.user_id = '$userid' AND users.user_stamp = stamp.stamp_id

All the tables must be related.

Greetings,