Mega Code Archive

Create materialized view

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', 'tkyte@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, 'Viper', '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> set timing off SQL> SQL> create materialized view my_orders_mv 2 build immediate 3 refresh on commit 4 enable query rewrite 5 as 6 select employee_id, 7 count(*) total_orders 8 from employees 9 group by employee_id 10 / from employees * ERROR at line 8: ORA-00439: feature not enabled: Materialized view rewrite SQL> SQL> set timing on SQL> select * from my_orders_mv; select * from my_orders_mv * ERROR at line 1: ORA-00942: table or view does not exist Elapsed: 00:00:00.07 SQL> set timing off SQL> drop table employees; Table dropped. SQL> SQL>