Digital Technology Databases - Validation Checks

These flashcards cover key concepts related to validation checks in digital technology databases, including types of checks, purposes, and examples.

What is the purpose of data validation in digital technology?

To ensure that data is sensible, reasonable, complete, and within acceptable boundaries.

What does a presence check ensure?

It ensures that data has been entered into a field, often identified by an asterisk as required.

What is verified in a length check?

It verifies that the data entered has the correct number of characters or does not exceed a specific maximum.

What does a type check confirm?

It confirms that data entered is of the correct data type, such as ensuring a date of birth is entered as a date.

How does a format check function?

It ensures that data entered matches an exact format or pattern, such as a postcode or date format.

What is a range check used for?

It ensures that a value entered is within an acceptable range, between specified upper and lower boundaries.

What is a lookup table in digital technology?

A list of data that can be used to provide values for other data fields, helping to speed up data entry and reduce mistakes.

What is the function of a check digit?

A digit added to the beginning or end of a number to verify that the number is an authentic code.

What is data verification?

A process to ensure that data entered into a system matches the original source, often by entering the data twice.