Create a view by joining two tables : Create View « View « Oracle PL/SQL Tutorial

1. Oracle PL/SQL Tutorial
2. View
3. Create View

SQL>
SQL>
SQL> create table courses
  2  ( code        VARCHAR2(6)
  3  , description VARCHAR2(30)
  4  , category    CHAR(3)
  5  , duration    NUMBER(2)) ;

Table created.

SQL>
SQL>
SQL> insert into courses values('SQL','SQL course',    'GEN',4);

1 row created.

SQL> insert into courses values('OAU','Oracle course', 'GEN',1);

1 row created.

SQL> insert into courses values('JAV','Java course',   'BLD',4);

1 row created.

SQL> insert into courses values('PLS','PL/SQL course', 'BLD',1);

1 row created.

SQL> insert into courses values('XML','XML course',    'BLD',2);

1 row created.

SQL> insert into courses values('ERM','ERM course',    'DSG',3);

1 row created.

SQL> insert into courses values('PMT','UML course',    'DSG',1);

1 row created.

SQL> insert into courses values('RSD','C# course',     'DSG',2);

1 row created.

SQL> insert into courses values('PRO','C++ course',    'DSG',5);

1 row created.

SQL> insert into courses values('GEN','GWT course',    'DSG',4);

1 row created.

SQL>
SQL>
SQL>
SQL> create table course_schedule
  2  ( course     VARCHAR2(6)
  3  , begindate  DATE
  4  , trainer    NUMBER(4)
  5  , location   VARCHAR2(20)) ;

Table created.

SQL>
SQL>
SQL> insert into course_schedule values ('SQL',date '1999-04-12',1,'VANCOUVER' );

1 row created.

SQL> insert into course_schedule values ('OAU',date '1999-08-10',2,'CHICAGO');

1 row created.

SQL> insert into course_schedule values ('SQL',date '1999-10-04',3,'SEATTLE');

1 row created.

SQL> insert into course_schedule values ('SQL',date '1999-12-13',4,'DALLAS' );

1 row created.

SQL> insert into course_schedule values ('JAV',date '1999-12-13',5,'SEATTLE');

1 row created.

SQL> insert into course_schedule values ('XML',date '2000-02-03',6,'VANCOUVER' );

1 row created.

SQL> insert into course_schedule values ('JAV',date '2000-02-01',7,'DALLAS' );

1 row created.

SQL> insert into course_schedule values ('PLS',date '2000-09-11',8,'VANCOUVER' );

1 row created.

SQL> insert into course_schedule values ('XML',date '2000-09-18',NULL,'SEATTLE');

1 row created.

SQL> insert into course_schedule values ('OAU',date '2000-09-27',9,'DALLAS' );

1 row created.

SQL> insert into course_schedule values ('ERM',date '2001-01-15',10, NULL    );

1 row created.

SQL> insert into course_schedule values ('PRO',date '2001-02-19',NULL,'VANCOUVER' );

1 row created.

SQL> insert into course_schedule values ('RSD',date '2001-02-24',8,'CHICAGO');

1 row created.

SQL>
SQL>
SQL> create or replace view crs_course_schedule as
  2  select o.course as course_code, c.description, o.begindate
  3  from   course_schedule o
  4         join
  5         courses   c
  6         on (o.course = c.code);

View created.

SQL>
SQL> drop table course_schedule;

Table dropped.

SQL>
SQL> drop table courses;

Table dropped.

SQL>
SQL>