Which one of the following statements is true about primary keys?
(A) A column of names is usually a good choice for use as a primary key.
(B) Only a single record can be used as a primary key.
(C) Social Security numbers are never used as a primary key.
(D) A primary key is used to uniquely identify records in a table.
(D) A primary key is used to uniquely identify records in a table.
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The value of the expression 20.0 * (9.0/5) + 32.0 is
a. 68.0 b. 52.0 c. expression has a syntax error so there is no value d. 32.0 e. an incorrect expression, the / should be %
A group of related tables is called a(n) ________ database
Fill in the blank(s) with correct word
There is no difference in a residential and a commercial lease.
Answer the following statement true (T) or false (F)
Which of the following is true of a Webinar?
a. It automatically delivers to subscribers the updated posts from their favorite blogs with limited one-way communication. b. It is a live Internet presentation that supports interactive communications between the presenter and the audience. c. It provides a set of tools to report project status. d. It determines the resource availability and schedule rooms for meetings over the internet.