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'll need to use a JOIN to bring the two tables together on the matching field, so something like:

$sql = "SELECT p.body, p.stamp, u.username FROM posts p INNER JOIN users u ON p.user_id=u.user_id WHERE p.user_id='$userid' ORDER BY p.stamp DESC";

Answer 2

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

http://dev.mysql.com/doc/refman/5.0/en/union.html

Answer 3

Try this:

select body, stamp, username 
from posts p JOIN users a ON p.user_id = a.user_id 
WHERE p.user_id = '$userid' order by stamp desc

Answer 4

 select body, stamp, username 
    from posts,users 
    where users.user_id = post.user_id 
        and users.user_id = '$userid' 
    order by stamp desc;

Answer 5

You should use aliases or table name to avoid the duplicate problem like this

tablename.column

or

alias.column

you can set the alias in your where clause :

FROM table as alias_name

Answer 6

This should work fine:

SELECT posts.body, posts.stamp, users.username 
FROM posts, users 
WHERE posts.user_id = '$userid' AND posts.user_id = users.user_id
ORDER BY posts.stamp DESC