The Human Resources department requests a list that contains the number (i. e. count) of orders taken on each date, grouped by the order date. [Be sure to use an aggregate operator in your query to receive credit for this question.]

the answer to your question would be something called hertz. the unit of measurement called a hertz, which is one cycle per second, is used to measure clock speed. within one cycle, your computer processes, refreshes, or updates itself to the changes that it is going through. in the case of computer clock speed, one hertz equals one tick per second. the clock speed of computers is usually measured in megahertz (mhz) or gigahertz (ghz)