DELETE Statement in Oracle SQL | Oracle SQL Tutorials -11

Hi,

I will explain DELETE Statement in Oracle SQL in this post of Oracle SQL Tutorial series.

Read the previous post of this tutorial series before this.

UPDATE Statement in Oracle SQL | Oracle SQL Tutorials -10

The Delete statement is popular command of Oracle SQL and You can delete any existing record in a table using Delete Statement.

DELETE Syntax

Delete statement syntax is as follows.

SQL> select EMPLOYEE_ID,FIRST_NAME,LAST_NAME,SALARY from hr.employees where EMPLOYEE_ID=100;

EMPLOYEE_ID FIRST_NAME           LAST_NAME                     SALARY
----------- -------------------- ------------------------- ----------
        100 MEHMET SALIH         DEVECI                         30000


SQL> delete from hr.employees where EMPLOYEE_ID=100;

1 row deleted.

SQL> commit;

Commit complete.

SQL> select EMPLOYEE_ID,FIRST_NAME,LAST_NAME,SALARY from hr.employees where EMPLOYEE_ID=100;

no rows selected

SQL>

Delete All Records

SQL> select * from hr.departments;

DEPARTMENT_ID DEPARTMENT_NAME                MANAGER_ID LOCATION_ID
------------- ------------------------------ ---------- -----------
           10 Administration                        200        1700
           20 Marketing                             201        1800
           30 Purchasing                            114        1700
           40 Human Resources                       203        2400
           50 Shipping                              121        1500
           60 IT                                    103        1400
           70 Public Relations                      204        2700
           80 Sales                                 145        2500
           90 Executive                             100        1700
          100 Finance                               108        1700
          110 Accounting                            205        1700

DEPARTMENT_ID DEPARTMENT_NAME                MANAGER_ID LOCATION_ID
------------- ------------------------------ ---------- -----------
          120 Treasury                                         1700
          130 Corporate Tax                                    1700
          140 Control And Credit                               1700
          150 Shareholder Services                             1700
          160 Benefits                                         1700
          170 Manufacturing                                    1700
          180 Construction                                     1700
          190 Contracting                                      1700
          200 Operations                                       1700
          210 IT Support                                       1700
          220 NOC                                              1700

DEPARTMENT_ID DEPARTMENT_NAME                MANAGER_ID LOCATION_ID
------------- ------------------------------ ---------- -----------
          230 IT Helpdesk                                      1700
          240 Government Sales                                 1700
          250 Retail Sales                                     1700
          260 Recruiting                                       1700
          270 Payroll                                          1700
           11 Computer Engineering                  201        1700
         2010 IT TUTORIAL

29 rows selected.

SQL> 











SQL> delete from hr.departments;

29 rows deleted.

SQL> commit; 

Commit complete.


SQL> select * from hr.departments;

no rows selected

SQL> 

Do you want to learn Oracle Database for Beginners, then read the following articles.

Oracle Tutorial | Oracle Database Tutorials for Beginners ( Junior Oracle DBA )