fetch multiple tables in one query

Question

This is thirty post in one houre . so i am sorry !

but i did\'t get what i want !

i will try to explain more ..

i have two tables ..

POSTS <--

Answer 1

<?php
$sql = "SELECT * FROM articles";
$query = mysql_query($sql);
while($result = mysql_fetch_assoc($query){
    echo $result['post_title'];
}
?>

Answer 2

Your question is super ambiguous, so I will do my best:

SELECT * FROM posts LEFT JOIN comments ON posts.post_id = comments.post_id

That is the query you want (same that you have, but * instead of "posts.,comments.".

This will, of course, retrieve all the rows in Posts, even if they don't have any comments. You need to do:

SELECT * FROM posts LEFT JOIN comments ON posts.post_id = comments.post_id WHERE posts.post_id= = <some_id>

to get only a specific post's comments. Of course, that would be silly since it would be the same thing as just doing:

SELECT * FROM comments WHERE post_id = <some_id>

If you want to only select rows in Posts that have comments, you must do:

SELECT * FROM posts INNER JOIN comments ON posts.post_id = comments.post_id

Or

SELECT * FROM posts NATURAL JOIN comments

(they have the same effect)

Answer 3

I am assuming you need to get all posts (and by posts you mean articles)

yes, you can use one query:

SELECT * FROM articles;

To get all articles