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Categories / Oracle PLSQL / Select Query

 

Query specific columns with where clause, or operator and order by

SQL> SQL> SQL> CREATE TABLE employees   2  ( employee_id          number(10)      not null,   3    last_name            varchar2(50)      not null,   4    email                varchar2(30),   5    hire_date            date,   6    job_id               varchar2(30),   7    department_id        number(10),   8    salary               number(6),   9    manager_id           number(6)  10  ); Table created. SQL> SQL> SQL> insert into employees( employee_id, last_name, email, hire_date, job_id, salary,department_id ,manager_id)   2                values ( 1001, 'Lawson', 'lawson@g.com', '01-JAN-2002','MGR', 30000,1 ,1004); 1 row created. SQL> SQL> insert into employees( employee_id, last_name, email, hire_date, job_id, salary, department_id ,manager_id)   2                values ( 1002, 'Wells', 'wells@g.com', '01-JAN-2002', 'DBA', 20000,2, 1005 ); 1 row created. SQL> SQL> insert into employees( employee_id, last_name, email, hire_date, job_id, salary, department_id ,manager_id)   2                 values( 1003, 'Bliss', 'bliss@g.com', '01-JAN-2002', 'PROG', 24000,3 ,1004); 1 row created. SQL> SQL> insert into employees( employee_id, last_name, email, hire_date, job_id, salary, department_id, manager_id)   2                 values( 1004,  'Kyte', 'YourName@a.com', SYSDATE-3650, 'MGR',25000 ,4, 1005); 1 row created. SQL> SQL> insert into employees( employee_id, last_name, email, hire_date, job_id, salary, department_id, manager_id)   2                 values( 1005, 'Dillon', 'sdillon@a .com', SYSDATE, 'PROG', 20000, 1, 1006); 1 row created. SQL> SQL> insert into employees( employee_id, last_name, email, hire_date, job_id, salary, department_id,manager_id)   2                 values( 1006, 'Beck', 'clbeck@g.com', SYSDATE, 'PROG', 20000, 2, null); 1 row created. SQL> SQL> insert into employees( employee_id, last_name, email, hire_date, job_id, salary, department_id, manager_id)   2                 values( 1007, 'Java', 'java01@g.com', SYSDATE, 'PROG', 20000, 3, 1006); 1 row created. SQL> SQL> insert into employees( employee_id, last_name, email, hire_date, job_id, salary, department_id, manager_id)   2                 values( 1008, 'Oracle', 'wvelasq@g.com', SYSDATE, 'DBA', 20000, 4, 1006); 1 row created. SQL> SQL> SQL> SQL> select employee_id, last_name, job_id   2        from employees   3       where employee_id = 1001   4          or manager_id = 1006   5  order by employee_id; EMPLOYEE_ID LAST_NAME                                          JOB_ID ----------- -------------------------------------------------- ------------------------------        1001 Lawson                                             MGR        1005 Dillon                                             PROG        1007 Java                                               PROG        1008 Oracle                                             DBA 4 rows selected. SQL> SQL> drop table employees; Table dropped. SQL>