One database field needs to be restricted to only those values that are single alphanumeric symbols. Which data type should be used?

Rationale

Character data type should be used to restrict values to single alphanumeric symbols.

The character data type is specifically designed to store single characters, which can include letters, numbers, and symbols. This makes it ideal for situations where only one alphanumeric symbol is permitted as an entry, ensuring that the database field meets the specified criteria.

A (Integer) YOUR ANSWER

Integer data types are used to store whole numbers without any decimal components. They cannot store alphanumeric symbols, as they are limited to numeric values only. Therefore, an integer would not satisfy the requirement of allowing single alphanumeric symbols.

B (Floating point) YOUR ANSWER

Floating point data types are used to represent numbers that require fractional precision, accommodating decimals. Like integers, they are not capable of storing alphanumeric characters or symbols, hence they cannot fulfill the requirement for single alphanumeric symbols in a database field.

C (Character string) YOUR ANSWER

Character strings can hold sequences of characters, including multiple alphanumeric symbols. However, they are not restricted to a single character, which is essential for this particular case. Therefore, using a character string would not ensure that only single alphanumeric symbols are allowed in the database field.

D (Character) CORRECT

The character data type is specifically designed to hold a single alphanumeric symbol. It perfectly fits the requirement of restricting a database field to only those values, ensuring that each entry is limited to one character.

Conclusion

In summary, the character data type is the most suitable option for a database field that needs to allow only single alphanumeric symbols. Other data types either do not accommodate characters at all or are too broad, allowing multiple characters. By utilizing the character data type, one can effectively enforce the desired restriction on the database field.

One database field needs to be restricted to only those values that are single alphanumeric symbols. Which data type should be used?

Character data type should be used to restrict values to single alphanumeric symbols.

Related Questions

Related Quizzes

How familiar were you with this question?

Report an Issue

Rate this Practice Test