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you need to use nested queries. in the sub query get all the rows which have values=yourNewValue and count the number of rows you have recieved. then in the super query check if count is less the 2 then insert the new value Hope it answers your question.

I am creating a list of images dynamically, following is the code <?php for ( $counter = 0; $counter < $obj1->id; $counter ++) { ?> <tr><td> Week <?php echo($counter+1); ?></td><td><?php echo" <a href=\"#hiddenDiv\" rel=\"facebox\";>";?><img src="tue.png"/></a></td></tr> <?php } ?> when the user clicks on the image a form opens. every image …