Final answer:
The statement retrieves the names of all constraints associated with the table 'EMP' in a database.
Step-by-step explanation:
The statement SELECT constraint_name FROM user_constraints WHERE table_name = 'EMP' is a SQL query. It retrieves the names of all constraints associated with the table 'EMP' in a database. In this case, the query is executed against the user_constraints table, which contains information about constraints defined in the user's schema.
Constraints in a database are rules that limit the type of data that can be inserted or updated in a table. They ensure data integrity and enforce business rules. Examples of constraints include primary key, foreign key, unique, and check constraints.
By running this query, you can obtain a list of constraint names associated with the table 'EMP'.