Where does the Postfix UNIX mail server store e-mail??

What type of controls display prompts such as drop-down lists, date pickers, text boxes, and check boxes?

A) Text B) Data C) Field D) Content

What statement is true about a field specified in the USING clause?

a. The column loses its table identity, so it cannot be referenced in the SELECT or any other clause. b. The column loses its table identity, so it must be fully qualified when referenced in the SELECT or any other clause. c. The column does not lose its table identity, so it must be fully qualified when referenced in the SELECT or any other clause. d. The column loses its table identity, so it does not need to be qualified when referenced in the SELECT or any other clause.