Author Question: Microsoft Access is a personal database system, and a personal database system is characterized by ... (Read 136 times)

serike · **on:** Jul 7, 2018

Microsoft Access is a personal database system, and a personal database system is characterized by ________.

A) the DBMS removing the metadata from the database
B) the DBMS product taking the role of the DBMS and the database application generator
C) the DBMS not supporting indexes
D) the DBMS product being limited to a maximum of ten tables in any given database

Question 2

Distinguish between Char and VarChar data types. Include examples and tradeoffs.

What will be an ideal response?

Ahnyah · **Reply #1 on:** Jul 7, 2018

Answer to Question 1

B

Answer to Question 2

Char data type is fixed-length, so that no matter the actual length of the data entered it will always take exactly the same storage space. For example, Char(10 ) indicates that 10 characters will always be stored for each value of that column. If the actual data entered is less than the specified fixed- length, the data will be padded with blanks. VarChar data type is variable length so that only the amount of space actually needed to store the data is used. Although VarChar may be more efficient in its use of space, it is not always preferred. VarChar requires the storage of some extra data to indicate the length of the data values, plus it requires some extra processing by the DBMS to arrange the variable length data. As another example, VarChar(10 ) indicates that the maximum length of a string to be stored in that field will be 10 characters. If the actual data are shorter, then fewer than 10 characters will be stored.