Oracle Database Data Definition Language (DDL Statements) – DROP Object Commands:
In this section, we will try to explain about important database DROP commands that are used by a data modeler by relating it with our example data.
|DROP SYNONYM SYN_EMPLOYEE_DTL;
|DROP VIEW VIEW_EMPLOYEE_DTL;
|DROP SEQUENCE SEQ_EMPLOYEE_DTL;
|DROP TRIGGER TRG_SEQ_EMPLOYEE_DTL;
Drop Table with Cascading Option:
In our example tables, try to drop tables GENDER_LKP, and DEPARTMENT_LKP after the data is loaded into GENDER_LKP, DEPARTMENT_LKP, and EMPLOYEE_DTL. You will get an error message.
If you want to drop parent tables that are connected with child tables, then you can use the following command.
|DROP TABLE GENDER_LKP CASCADE CONSTRAINTS;
DROP TABLE DEPARTMENT_LKP CASCADE CONSTRAINTS;