使用另一个查询的结果查询MySql数据库

Question

My PHP code is below:

    $query1=("SELECT * FROM test_log WHERE '$mktime' < expiry ORDER BY id DESC"); 
        $result1=mysql_query($query1); 
        $num1=mysql_num_rows($result1);


    while ($row1 = mysql_fetch_array($result1))
        { 
        $id = $row1["id"];
        $keyword = $row1["keyword"];
        $sale = $row1["sale_rent"];
        $agents = $row1["e_num"];
        $email = $row1["email"];
        $cc_email = $row1["cc_email"];
        $expiry = $row1["expiry"];

        $query2= ("SELECT * FROM condo WHERE (location LIKE '%{$row1['keyword']}%' AND sale_rent LIKE '%{$row1['sale_rent']}%' AND e_num LIKE '{$row1['e_num']}') AND (date >= '$sendate') AND TRIM(IFNULL(`phone_1`,'')) <> '' ORDER BY sale_rent, location");
        $result2=mysql_query($query2);    
    $num2=mysql_num_rows($result2);
//the code continues

As you can see, I'm using the results of $query1 to query the condo table ($query2). I don't want to do this anymore. Could you show me how to combine both queries into a single query & achieve the same result?

Thanks a lot.

Latest Update Okay this is what I've done so far.

<?php   
include("/path/to/my/website.com/public_html/db_connect.php");

$mktime = date('Y-m-d');
$sendate = date('Y-m-d', strtotime('1 days ago'));

$query1=("SELECT * FROM test_log AS t JOIN condo AS c ON c.location LIKE CONCAT('%', t.keyword, '%') AND c.sale_rent LIKE CONCAT('%', t.sale_rent, '%') AND c.e_num LIKE CONCAT('%', t.e_num, '%') WHERE t.expiry > '$mktime' AND c.date > '$sendate' AND TRIM(IFNULL(c.phone_1, '')) != '' ORDER BY t.id, c.sale_rent, c.location"); 
$result1=mysql_query($query1); 
$num1=mysql_num_rows($result1);

$subject = "Latest Classified Ads - Condo";

$message_tmp  = "<div align='center'>";
$message_tmp .= "<TABLE cellSpacing=0 cellPadding=0 width=100% border=0 id='table1'>";
$message_tmp .= "<TR>";
$message_tmp .= "<TD width=100% height=20 bgcolor='#E5E5E5' align='left' valign='top'>
<p align='center'><b><font size='3'>Comprehensive Real Estate Agency Tools & Property Valuation Services at <a href=\"http://www.cashbillion.com/free-email-alerts\">http://www.cashbillion.com</a></font></b></TD>";
$message_tmp .= "</TR>";
$message_tmp .= "<TR>";
$message_tmp .= "<TD width=100% height=20 bgcolor='#EFEFEF' align='left' valign='top'>
    ~ Classified Ads<br>
    ~ Facebook Promotions<br>
    ~ Public Records Search<br>
    ~ Demographic Statistics<br>
    ~ Property Market Values<br>
    ~ Property Owners Listings<br>
    ~ Real Estate Price Trend Analysis<br>
</p></TD>";
$message_tmp .= "</TR>";
$message_tmp .= "<TR>";
$message_tmp .= "</TR>";
$message_tmp .= "</TABLE>";
$message_tmp .= "</div>";
$message_tmp .= "<h4>List of Latest Classified Ads - Condo</h4>"; 
$message_tmp .= "<table bgcolor='black' cellspacing='1' width='100%'><tr bgcolor='white' align='center'>"; 
$message_tmp .= "<td><b>Date</b></td>";
$message_tmp .= "<td><b>Location</b></td>"; 
$message_tmp .= "<td><b>Property Type</b></td>";
$message_tmp .= "<td><b>Tenure</b></td>";
$message_tmp .= "<td><b>Status</b></td>";
$message_tmp .= "<td><b>Sale / Rent</b></td>";
$message_tmp .= "<td><b>Size</b></td>";
$message_tmp .= "<td><b>Price</b></td>";
$message_tmp .= "<td><b>Price Psf</b></td>";
$message_tmp .= "<td><b>Rooms</b></td>";
$message_tmp .= "<td><b>Baths</b></td>";
$message_tmp .= "<td><b>Renovations</b></td>";
$message_tmp .= "<td><b>Furnishings</b></td>";
$message_tmp .= "<td><b>Phone</b></td>";
$message_tmp .= "<td><b>Advertiser</b></td>";
$message_tmp .= "<td><b>E Number</b></td>";
$message_tmp .= "</tr>"; 
$message_tmp .= "[new_rows]"; 
$message_tmp .= "</table>";
$message_tmp .= "<br>To unsubscribe, go to <a href=\"http://www.mywebsite.com/unsubscribe-from-email-alerts/\"><strong>http://www.mywebsite.com/unsubscribe-from-email-alerts/</a></strong>";
$message_tmp .= "<br>Try our free services at <a href=\"http://www.mywebsite.com/free-email-alerts/\"><strong>http://www.mywebsite.com/free-email-alerts/</a></strong> your property market information provider.";

while ($row1 = mysql_fetch_array($result1))
    { 
$new_rows .= "<tr bgcolor='white' align='left'>"; 
$new_rows .= "<td align=center><font face=arial size=1.5>".$row1["date"]."</td>";
$new_rows .= "<td align=left><font face=arial size=1.5>".$row1["location"]."</td>"; 
$new_rows .= "<td align=center><font face=arial size=1.5>".$row1["property_type"]."</td>";
$new_rows .= "<td align=center><font face=arial size=1.5>".$row1["tenure"]."</td>";
$new_rows .= "<td align=left><font face=arial size=1.5>".$row1["status"]."</td>"; 
$new_rows .= "<td align=center><font face=arial size=1.5>".$row1["sale_rent"]."</td>"; 
$new_rows .= "<td align=center><font face=arial size=1.5>".$row1["size"]."</td>";
$new_rows .= "<td align=left><font face=arial size=1.5>".$row1["price"]."</td>"; 
$new_rows .= "<td align=center><font face=arial size=1.5>".$row1["price_psf"]."</td>"; 
$new_rows .= "<td align=center><font face=arial size=1.5>".$row1["rooms"]."</td>";
$new_rows .= "<td align=left><font face=arial size=1.5>".$row1["baths"]."</td>"; 
$new_rows .= "<td align=center><font face=arial size=1.5>".$row1["renovations"]."</td>";
$new_rows .= "<td align=center><font face=arial size=1.5>".$row1["furnishings"]."</td>";
$new_rows .= "<td align=left><font face=arial size=1.5>".$row1["phone_1"]."</td>"; 
$new_rows .= "<td align=center><font face=arial size=1.5>".$row1["advertiser"]."</td>";  
$new_rows .= "<td align=center><font face=arial size=1.5>".$row1["e_num"]."</td>";
$new_rows .= "</tr>";

    $email = $row1["email"];
    $cc_email = $row1["cc_email"];
    $expiry = $row1["expiry"];
    $keyword = $row1["keyword"];

    if (!empty($new_rows))
            {
            $message = str_replace("[new_rows]",$new_rows,$message_tmp);
            $message .= "<br>Your notification will expire on <font color='#FF0000'><strong>$expiry</strong></font>";
            $message .= "<br>Your requested keyword is <font color='#FF0000'><strong>$keyword</strong></font><br><br>";

    echo $email;
    echo ',';
    echo $cc_email;
    echo ',';
    echo $keyword;
    echo '<br>';
    echo $subject;
    echo '<br>';
    echo $message;
    echo '<br>';
    echo $new_rows;
    echo '<br><br>';

            }
    }

    ?>

From this code, what is supposed to happen is a keyword stored in test_log is used to query the location column of the condo table. The results of this query is then emailed to the email address that corresponds with the keyword. The email address is stored in the email column of test_log .

I've not incorporated the emailing script yet. I'm focusing on displaying the query results first to check whether the right message is supposed to go to the right email or not.

I don't think it is looping properly but I can't explain why either...

Latest UPDATE Okay this is my new query which does not work when run directly on PHP MyAdmin.

SELECT condo.location, condo.sale_rent, condo.e_num, condo.date, condo.phone_1 innerQuery.* FROM condo JOIN (SELECT * FROM test_log WHERE '2015-04-15' < expiry ORDER BY id DESC) AS innerQuery WHERE condo.location = innerQuery.keyword AND condo.sale_rent = innerQuery.sale_rent AND condo.e_num = innerQuery.e_num AND condo.date >= '2015-04-14' AND TRIM(IFNULL(`condo.phone_1`,'')) <> '' ORDER BY condo.sale_rent, condo.location

The message that I get on PHP MyAdmin is:

#1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '.* FROM condo JOIN (SELECT * FROM test_log WHERE '2015-04-15' < expiry ORDER BY ' at line 1

How do I get this working? Thanks for your help.

Answer 1

Use a JOIN :

SELECT *
FROM test_log AS t
JOIN condo AS c 
ON c.location LIKE CONCAT('%', t.keyword, '%') 
    AND c.sale_rent LIKE CONCAT('%', t.sale_rent, '%')
    AND c.e_num LIKE CONCAT('%', t.e_num, '%')
WHERE t.expiry > '$mktime'
    AND c.date > '$sendate'
    AND TRIM(IFNULL(c.phone_1, '')) != ''
ORDER BY t.id, c.sale_rent, c.location

Answer 2

I won't get into the specifics of the query but I will get you started with what I believe is the first step in the right direction. What you are trying to do should be possible with a nested query:

SELECT condo.FieldA, innerQuery.* FROM condo JOIN (SELECT * FROM test_log WHERE '$mktime' < expiry ORDER BY id DESC) AS innerQuery WHERE condo.FieldA = innerQuery.SomeField