SQL>
SQL>
SQL> CREATE TABLE Office
2 (office_id VARCHAR2(10) NOT NULL,
3 building_name VARCHAR2(20),
4 PRIMARY KEY (office_id));
Table created.
SQL>
SQL> CREATE TABLE Programmer
2 (lect_id VARCHAR2(10) NOT NULL,
3 lect_name VARCHAR2(20),
4 office_id VARCHAR2(10),
5 PRIMARY KEY (lect_id),
6 FOREIGN KEY (office_id) REFERENCES Office (office_id)
7 ON DELETE CASCADE);
Table created.
SQL>
SQL> drop table Office cascade constraints;
Table dropped.
SQL> drop table Programmer cascade constraints;
Table dropped.