使用PHP检查MySQL查询中哪个表的结果？

Question

I am using the following MySQL query to check several tables for any results where the date is within 30 days.

What I want to do is be able to also check which table had the result, not just whether the MySQL query found a result in general.

One of my tables is supplier_bank_details, so if there is a record in this table with a date which is less than 30 days old then I am echoing out bank detail information, otherwise if it's my other table supplier_invoices then I want to echo out invoice information.

Here's what I have so far but I am really new to MySQL and struggling a bit. Please could someone show me what I would need to do to get this to work.

<?php require_once 'config.php'; ?>

<?php
$tbl_name = 'supplier_bank_details';
$tbl_name2 = 'supplier_invoices;

$query = "select * from $tbl_name, $tbl_name2 WHERE date > NOW() - INTERVAL 30 DAY ORDER BY date DESC";

$result = mysql_query($query) or die( mysql_error() );
$row = mysql_fetch_assoc($result); 

if(mysql_num_rows($result) > 0) {

$datetime1 = new DateTime(); // Today's Date/Time
$datetime2 = new DateTime($row['date']);
$interval = $datetime1->diff($datetime2);


if(mysql_num_rows($tbl_name) > 0) {

$account_number = '****'.substr($row['account_number'], -4);

echo '<div class="contracts_area"><div class="table_header"></div>';
echo '<div class="request"><p>Bank Details Changed</p><p>'.$row['sort_code'].'</p><p>'.$account_number.'</p><p>about '.$interval->format('%d days ago').'</p></div>';
echo '</div>';

}else{

some invoice info here

}else{

echo '<div class="no_activity">No Recent Activity</div>';    
} 

}?>

Answer 1

Not too elegant, but you can add a constant field to your query, which refers to the table name:

select *,"tab1" as tablename from tab1

A column, called tablename will appear, wit with value of "tab1" in each row. It works only if there is least one record in the table.

Update : it's more useful, when you join different tables into a single result set.

Answer 2

Use separate queries if the data from both tables doesn't need to be merged together. Have one function to get supplier_bank_details over the last x days, another to get supplier_invoices over the last x days, and then you can handle any logic about what you want to show in PHP.