Question

What does choosing a column type accomplish?

a. it defines the column length
b. it determines the type of data to include in each field
c. it defines the name of the column
d. it sets the colors available for display

Answer 1

Choosing a column type in a database management system determines the type and length of data that can be stored in each field of the column, but it does not define the column name.

Therefore, the correct options are:

a. it defines the column length

b. it determines the type of data to include in each field

c. it defines the name of the column

Step-by-step explanation:

Database Management Systems (DBMS) are software systems used to store, retrieve, and run queries on data.

Choosing a column type in a database management system accomplishes several things:

1. It determines the type of data that can be stored in each field of the column. For example, a column type may be defined as text, number, date, or boolean.
2. It defines the column length. This means it sets the maximum number of characters or digits that can be stored in each field of the column.
3. It does not define the name of the column. The column name is typically set separately when creating the database table.

For instance, a text column type may include alphanumeric characters and have a variable length, while an integer column type will accept only whole numbers.

Deciding on the appropriate column type is crucial as it influences data integrity, storage efficiency, and how data can be manipulated and retrieved.