A database administrator has created a primary table and must ensure the date column in the table only accepts date values. Which of the following does the administrator need to set?

A schema defines the overall structure of the database, tables, and relationships, but 'setting a schema' is not the specific action to enforce data type validation on a column.

A primary key uniquely identifies rows and enforces non-nullability, but it does not specifically restrict a column to only accept date values.

To restrict a column to only accept date values, the database administrator needs to set a constraint. This can involve defining the column with a DATE data type, which inherently enforces date-only values, or using a CHECK constraint for more complex validation rules.

Permissions control user access and actions within the database, but they do not enforce data type or value restrictions on columns.