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Example: If a data type is set to be ‘numeric’, then all other types, such as a character(s) will be denied with an error.
By setting an input mask in a field in Microsoft Access, it controls the way data can be entered.
Check constraints are used to make certain that a statement about the data is true for all rows in a table.
The unique constraint ensures that no two rows have the same values in their columns.
Validation Rule Property: This property allows the database designer to set a validation rule, so that data inputted into the database must follow a certain rule.
Referential integrity will prevent inputting data in the foreign key column that is not listed in the lookup table.
However, the inserts and updates allowed by referential integrity occur when the data inserted is located in the lookup table.
Typically, referential integrity is applied when data is inserted, deleted, or updated.
The inserts and updates to the data table prevented by referential integrity happen in the foreign key column.