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