A very important feature provided by $DB$ is the system catalog. In this question we will use a view from system catalog called user$\_$constraints which describes the constraints defined on tables in the current user's schema. You may use 'desc user$\_$constraints' to see the columns defined in this view.

You need to define a user$-$defined record type called Constr, which has three columns:Write an anonymous PL$/$SQL block, define a cursor for retrieving the info from the view of user$\_$constraints for the table EMP. In the executable section, your program will run a loop to fetch the values returned by the cursor, into a record variable just defined. Then print out the contents of this record.

The lines below are for your reference,Description of constraint type LETTER:P $-$ Primary key.U $-$ Unique key.R $-$ Referential integrity.C $-$ Check constraint on a table.