State two ways in which data validation is implemented on an input form of a database application.

State two ways in which data validation is implemented on an input form of a database application.

1. apply data type check
2. apply validation rule criteria / validation text
3. apply code check-ensures that a field is selected from a valid list of values
4. apply format check e.g. YYY-MM-DD
5. apply range check
6. apply consistence check