Question

I have two tables that I want to select from. I have a table called articles which stores various articles for my content management system and I have another called articles_meta_data that stores meta data for the articles table. In order to get an article’s meta data, you select from articles_meta_data using the article Id. My code is here and works perfectly. Is there a way I can optimize the code and make it faster?

$result = mysql_query("SELECT * FROM articles");    
while ($row = mysql_fetch_object($result)) {
    $result2 = mysql_query("SELECT * FROM articles_meta_data WHERE article_ID=" . $row->ID);
    while ($row2 = mysql_fetch_object($result2)) {
        var_dump($row2);
    }
}

Answer 1

join the tables so you will only query the database once, eg

SELECT  b.*
FROM    articles a
        INNER JOIN articles_meta_data b
            ON a.ID = b.article_ID

To further lean more about join, please see the link below

• Visual Representation of SQL Joins