How to select column from multi table mysql - php

Question

I have two tables are subscribe and favorite.
subscribe [id subscribeid subscribeto datetime]
favorite [id wordid userid datetime]
So, I want to show these actively in news feed that can separate in each loop, where from which table?my code is look like this
$sql = "(SELECT * FROM favorite) UNION (SELECT * FROM subscribe) ORDER BY datetime DESC";
$result = mysql_query($sql)or die(mysql_error());
while($array = mysql_fetch_array($result)){
if($array['wordid']!=""){
echo "This's favorite feed";
}else{
echo "This's subscribed feed";
}
//echo $array['wordid'];
echo "<hr />";
}
In the condition of if($array['wordid']!="") I think it should work, but when in echo in commented line it always has a values, I don't know why is that.
Please help or suggest, thanks.

Answer 1

You can use alias function to union the result set. Based on cate field you can determine the results from which table.
Use mysqli extension instead of mysql
<?php
$sql = "SELECT id,
subscribeid As common_id,
subscribeto,
datetime, 'subscribe' As cate
FROM subscribe
UNION
SELECT id,
wordid As common_id,
userid As subscribeto,
datetime,
'favorite' As cate
FROM favorite";
$result = mysql_query($sql)or die(mysql_error());
while($array = mysql_fetch_array($result)){
if($array['cate']!="subscribe"){
echo "This's favorite feed";
}else{
echo "This's subscribed feed";
}
//echo $array['wordid'];
echo "<hr />";
}