display selected fields from multiple mysql table

[g_sobhani]

Hi all,
I'm new to php. I have a mysql table which contain 3 tables of content

table 1
id type execution_date executor established project_title tab_content

table 2
id type execution_date executor established project_title ins_consult

table 3
id type execution_date executor established project_title forum_cons

i want to display them in a spreadsheet (.xls) with some conditions.

Conditions are:
#select all table or individual table to display result
#select all field from all table
#select some fields from all table or single table

i have implement some issue

$DB_Server = "localhost";		//your MySQL Server 
$DB_Username = "root";				 //your MySQL User Name 
$DB_Password = "";				//your MySQL Password 
$DB_DBName = "icddrb";				//your MySQL Database Name 
$search_from_date = $_POST['start_date'];
$search_to_date = $_POST['end_date'];
$Connect = @mysql_connect($DB_Server, $DB_Username, $DB_Password)
	or die("Couldn't connect to MySQL:<br>" . mysql_error() . "<br>" . mysql_errno());
$Db = @mysql_select_db($DB_DBName, $Connect)
	or die("Couldn't select database:<br>" . mysql_error(). "<br>" . mysql_errno());
$now_date = date('m-d-Y H:i');

if(($_POST['typer_of_report'] == 'rrc_report')  || ($_POST['typer_of_report'] ==  'all_report'))
{
	$DB_TBLName = 'rrc_record';
}

if(($_POST['typer_of_report'] == 'erc_report')  || ($_POST['typer_of_report'] ==  'all_report'))
{
	$DB_TBLName2 = 'erc_record';
}

if(($_POST['typer_of_report'] == 'aeec_report')  || ($_POST['typer_of_report'] ==  'all_report'))
{
	$DB_TBLName3 = 'aeec_record';
}



$file_type = "vnd.ms-excel";
$file_ending = "xls";
//}
header("Content-Type: application/$file_type");
header("Content-Disposition: attachment; filename=protocol_report.$file_ending");
header("Pragma: no-cache");
header("Expires: 0");

if($DB_TBLName)
{
$sql = "Select * from ".$DB_TBLName." where execution_date >= '".$search_from_date."' and 
				execution_date <= '".$search_to_date."' order by execution_date desc";
$Use_Title = 1;


$title = "Report for $DB_TBLName on $now_date";
$result = @mysql_query($sql,$Connect)
	or die("Couldn't execute query:<br>" . mysql_error(). "<br>" . mysql_errno());

if ($Use_Title == 1)
{
	echo("$title\n");
}
$sep = "\t"; //tabbed character
for ($i = 0; $i < mysql_num_fields($result); $i++)
{
	echo mysql_field_name($result,$i) . "\t";
}
print("\n");
while($row = mysql_fetch_row($result))
{
	$schema_insert = "";
	for($j=0; $j<mysql_num_fields($result);$j++)
	{
		if(!isset($row[$j]))
			$schema_insert .= "NULL".$sep;
		elseif ($row[$j] != "")
			$schema_insert .= "$row[$j]".$sep;
		else
			$schema_insert .= "".$sep;
	}
	$schema_insert = str_replace($sep."$", "", $schema_insert);
	$schema_insert = preg_replace("/\r\n|\n\r|\n|\r/", " ", $schema_insert);
	$schema_insert .= "\t";
	print(trim($schema_insert));
	print "\n";
}
//}

}