Need to combine 2 tables - php

Question

Taking a deep breath, really don't know how to combine 2 tables from my MySQL,
I will show you the tables which I've and the rows which needed to be combinated.
Table called post:
As you see cat means Category, which category it is (see below category table nameID is same as cat here)
For example my page www.site.com/category.php?nameid=NAMEID(table category)&id=ID(table post) Need to be combined so if I go to ?nameid=1&id8 the page should be blanc or giving an error since id=8 is category 2 and not 1.
// BEGIN OF SHOWING CONTENT PAGE
if (isset($_GET['id'])){
$naamID = mysql_real_escape_string($_GET['nameID']);
$id = mysql_real_escape_string($_GET['id']);
$idnext = $id + 1;
$gn = (" SELECT * FROM category WHERE nameID='".$naamID."'") or die(mysql_error());
$go = (" SELECT * FROM post WHERE id='".$id."'") or die(mysql_error());
$gnn = mysql_query($gn) or die(mysql_error());
$goo = mysql_query($go) or die(mysql_error());
$gnnn = mysql_fetch_array($gnn);
$gooo = mysql_fetch_array($goo);
if(empty($gooo['youtube'])){
} else {
?> <h2> <?php echo htmlspecialchars($gooo["title"]); ?> </h2><br />
<?php
echo '<iframe width="560" height="315" src="//www.youtube.com/embed/'.$gooo["youtube"].'" frameborder="0" allowfullscreen></iframe><br />';
}
if(empty($gooo['pic'])){
} else {
?> <h2> <?php echo htmlspecialchars($gooo["title"]); ?> </h2><br />
<?php
echo '<img src="'.$gooo["pic"].'"/>';
}
}
?>

Answer 1

SELECT table1.keyid FROM table1
UNION
SELECT table2.keyid FROM table2
i wish this example help you ,try to understand how to combine 2 tables

Answer 2

I think i don't understand need of passing categid, as post id itself looks like primary key, so you must able to fetch particular post record, and can retrieve name of that category which is linked with requested post using something like(you just need to pass post id in parameter)
SELECT youtube,title,c.name,pic FROM post p
INNER JOIN categories c
ON c.nameid=p.cat
WHERE p.id=2
If you are trying to get requested post record along with all posts from requested category than you can write query like
SELECT youtube,title,c.name,pic
FROM post
INNER JOIN categories c
ON c.nameid=p.cat
WHERE (p.id=8 or cat=2)
Hope this will help!
Thanks
Suresh

Answer 3

Update:
Based on what I understood, following code snippet may solve your problem
$row = mysql_query("SELECT p.cat, c.nameID FROM post p INNER JOIN category c ON p.cat = c.nameID WHERE p.cat = '".$id."' AND c.nameID = '".$naamID."' LIMIT 1");
if(mysql_num_rows($row)==0)
{
echo("This post doesn't exist on this category")
}
Update 2:
<?if (isset($_GET['id']))
{
$naamID = mysql_real_escape_string($_GET['nameID']);
$id = mysql_real_escape_string($_GET['id']);
$row1 = mysql_query("SELECT p.cat, c.nameID FROM post p INNER JOIN category c ON p.cat = c.nameID WHERE p.cat = '".$id."' AND c.nameID = '".$naamID."' LIMIT 1");
if(mysql_num_rows($row1)==0)
{
echo("This post doesn't exist on this category");
}
else
{
$idnext = $id + 1;
$gn = (" SELECT * FROM category WHERE nameID='".$naamID."'") or die(mysql_error());
$go = (" SELECT * FROM post WHERE id='".$id."'") or die(mysql_error());
$gnn = mysql_query($gn) or die(mysql_error());
$goo = mysql_query($go) or die(mysql_error());
$gnnn = mysql_fetch_array($gnn);
$gooo = mysql_fetch_array($goo);
/*--------------your other display code when data is available-------------*/
}
}
?>