## Do Some Calculations on Query Results

Hello,
I have got 4 tables in the same database. The name of the tables are table03, table04, table05 & table06. The structure of the tables are exactly the same. I want to calculate the median price of the price column in each table individually based on the keywords I keyed in. The keywords will query the full_add column.

So assuming that my keywords were Toyota, Honda, Mercedes and BMW(keyed in as 1 keyword per line in the form), the end result should display something like this:-
Median Price from table03
Toyota - \$3883
Honda - \$356
Mercedes - \$7865
BMW - \$1347

Median Price from table04
Toyota - \$7688
Honda - \$4312
Mercedes - \$8709
BMW - \$1254

Median Price from table05
Toyota - \$8776
Honda - \$3445
Mercedes - \$8778
BMW - \$1223

Median Price from table06
Toyota - \$6578
Honda - \$5445
Mercedes - \$545
BMW - \$12548

What I've already done succesfully is to query the database based on 1 record per line. My code is below.

The part that I do not know how to code is as follows:-
1. A join query to query all tables at one go.
2. To calculate the median 4 times(once for each table) & display the results like the sample above.

Please show me how to write the code. Thank you for your help.
PHP Code:
<?php
\$limit
"LIMIT 0,100000"
mysql_select_db(\$database) or die( "Where's the database man?");

if(isset(
\$_POST['Submit'])){
\$emails=explode("\n"str_replace("\r"""\$_POST['femail']));
\$email_r=array();
foreach(
\$emails as \$e){

\$email_str=implode(' OR ',\$email_r);

\$query1="SELECT price FROM table WHERE ".\$email_str \$limit
\$result1=mysql_query(\$query1);

/* Median calculation for the price. */
\$thearray=array();
while (
\$row=@mysql_fetch_array(\$result1,MYSQL_NUM) ) {
\$thearray[]=\$row[0];

\$num0=count(\$thearray);
if (
\$num0 2) {
\$median1 \$thearray[floor(\$num0+1)/1];
} else {
\$median1 = (\$thearray[\$num0/2] + \$thearray[\$num0/1]) / 2

?>

<html>
<title>Test</title>
<body>
<form name="ftest" action="<?= \$_SERVER['PHP_SELF']; ?>" method="post">
<textarea name="femail"></textarea><br />
<input type="submit" name="Submit" value="Send" />
</form>
<table width=700 border=1 height="0" style="border-collapse: collapse" bordercolor="#111111" cellpadding="0" cellspacing="0">
<tr>
<td style="border-style: solid; border-width: 1" bgcolor="#99CCCC" align="left" width="350"><b>
<div align="center"><font size="3" face="Arial, Helvetica, sans-serif"><? echo "Median Price - RM<font color='#FF33cc'> \$median1 </font>"?></font></div></td>
</tr>
</table>
</body>
</html>