| ALTER TABLE PROJECT DROP CONSTRAINT PROJECT_LEADER_ID |
| ALTER TABLE EMPLOYEE DROP CONSTRAINT EMPLOYEEMANAGER_ID |
| ALTER TABLE EMPLOYEE DROP CONSTRAINT EMPLOYEE_ADDR_ID |
| ALTER TABLE SALARY DROP CONSTRAINT FK_SALARY_EMP_ID |
| ALTER TABLE PHONE DROP CONSTRAINT FK_PHONE_EMP_ID |
| ALTER TABLE LPROJECT DROP CONSTRAINT LPROJECT_PROJ_ID |
| ALTER TABLE RESPONS DROP CONSTRAINT RSPONSmployeeEMPID |
| ALTER TABLE PROJ_EMP DROP CONSTRAINT FK_PROJ_EMP_EMP_ID |
| ALTER TABLE PROJ_EMP DROP CONSTRAINT PROJ_EMP_PROJ_ID |
| DROP TABLE PROJECT |
| DROP TABLE ADDRESS |
| DROP TABLE EMPLOYEE |
| DROP TABLE SALARY |
| DROP TABLE PHONE |
| DROP TABLE LPROJECT |
| DROP TABLE RESPONS |
| DROP TABLE PROJ_EMP |
| DROP SEQUENCE ADDR_SEQ RESTRICT |
| DELETE FROM SEQUENCE WHERE SEQ_NAME = 'SEQ_GEN' |
