DB Comparisons

Hi Folks, I¹m curious if there are any previous discussions / Articles / URL¹s that compare the power and scalability of MySQL (with php) with other technologies like MS sequel server oracle - coldfusion etc.... I imagine that most middleware like php / asp / coldfusion is relatively good & fast - (let me know if one is better ). Mostly I¹m concerned with the speed and power of the backend database as to how it functions on an enterprise scale ­ such as how many hits it can handle per hour ­ how many users before it starts to slow down etc. -- Thanks - RevDave Cool @ hosting4days . com [db-lists 09]