calculating total books

Author: theprogrammerin

all.php

@@ -3,12 +3,13 @@
 .del:hover{ background:#FFF;}
 </style>
 <table width="853" border="0" cellspacing="1" style="  margin-left:15px;background:#F90;font-size:12px; font-family:Verdana, Geneva, sans-serif;">
-<?php 
+<?php
 	include('database/config.php');
-$q="select b.book_id, title, author_name, branch_name, no_of_copies from book b
+$q="select b.book_id, title, author_name, branch_name, no_of_copies, no_issued, (no_issued + no_of_copies) AS no_total from book b
 join book_authors ba on b.book_id  = ba.book_id
 join book_copies bc on b.book_id=bc.book_id
 join library_branch lc on bc.branch_id = lc.branch_id
+join (SELECT  book_id, count(*) AS no_issued FROM book_loans GROUP BY book_id) book_issues ON book_issues.book_id = b.book_id
 order by b.book_id;
 ";
 $rs=mysql_query($q);
@@ -26,23 +27,23 @@
     <td width="120"><?php echo $row['author_name']; ?></td>
     <td width="120"><?php echo $row['branch_name']; ?></td>
     <td width="50" >
-	<input readonly="readonly" type="text" style="background:#FFF;padding:2px; width:20px;" value="<?php echo $row['no_of_copies'];;
+	<input readonly="readonly" type="text" style="background:#FFF;padding:2px; width:20px;" value="<?php echo $row['no_total'];;
  ?>"/></td>
  <td width="50" >
 	<input readonly="readonly" type="text" style="background:#FFF;padding:2px; width:20px;" value="<?php echo $row['no_of_copies'];;
  ?>"/></td>
    <td class="view">
 <a href="?addBooks&book_id=<?php echo $row['book_id'] ?>&view">View</a></td>
-   
+
    <td class="edit"><a  href="?addBooks&book_id=<?php echo $row['book_id']; ?>">Edit</a></td>
    <td class="del">
 <?php echo '<div align="center"><a href="#" id="'.$row['book_id'].'" class="delbutton">Delete</a></div>'; ?>
 
    </td>
-   
+
 
   </tr>
-  
+
 
 <?php	}
 ?>
@@ -74,7 +75,7 @@
    url: "delete.php",
    data: info,
    success: function(){
-   
+
    }
  });
          $(this).parents(".hr").animate({ backgroundColor: "#fbc7c7" }, "fast")