I have written a simple mysql search form that searches between two dates. This query working perfect:

$sql = "SELECT * FROM table WHERE  dateStarted like '%$checkin%' 
AND dateEnded like '%$checkout%'";

Fakat

$sql2 = "SELECT * FROM table WHERE  dateStarted = $checkin 
AND dateEnded = $checkout";

Herhangi bir sonuç yok yok? İki sql arasındaki fark nedir?

Edit:

$checkin and $checkout are date (16-07-2010) 

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