postgres=#
postgres=# CREATE TABLE "books" (
postgres(# "id" integer NOT NULL,
postgres(# "title" text NOT NULL,
postgres(# "author_id" integer,
postgres(# "subject_id" integer,
postgres(# Constraint "books_id_pkey" Primary Key ("id")
postgres(# );
NOTICE: CREATE TABLE / PRIMARY KEY will create implicit index "books_id_pkey" for table "books"
CREATE TABLE
postgres=#
postgres=#
postgres=# insert into books values (7808, 'Java', 4156, 9);
INSERT 0 1
postgres=# insert into books values (4513, 'Javascript', 1866, 15);
INSERT 0 1
postgres=# insert into books values (4267, 'C#', 2001, 15);
INSERT 0 1
postgres=# insert into books values (1608, 'Oracle', 1809, 2);
INSERT 0 1
postgres=# insert into books values (1590, 'Sql Server', 1809, 2);
INSERT 0 1
postgres=# insert into books values (25908, 'Postgre SQL', 15990, 2);
INSERT 0 1
postgres=# insert into books values (1501, 'Python', 2031, 2);
INSERT 0 1
postgres=# insert into books values (190, 'Java by API', 16, 6);
INSERT 0 1
postgres=# insert into books values (1234, '2D', 25041, 3);
INSERT 0 1
postgres=# insert into books values (2038, 'C', 1644, 0);
INSERT 0 1
postgres=# insert into books values (156, 'C++', 115, 9);
INSERT 0 1
postgres=# insert into books values (41473, 'Programming Python', 7805, 4);
INSERT 0 1
postgres=# insert into books values (41477, 'Learning Python', 7805, 4);
INSERT 0 1
postgres=# insert into books values (41478, 'Perl Cookbook', 7806, 4);
INSERT 0 1
postgres=# insert into books values (41472, 'Practical PostgreSQL', 1212, 4);
INSERT 0 1
postgres=#
postgres=# select * from books;
id | title | author_id | subject_id
-------+----------------------+-----------+------------
7808 | Java | 4156 | 9
4513 | Javascript | 1866 | 15
4267 | C# | 2001 | 15
1608 | Oracle | 1809 | 2
1590 | Sql Server | 1809 | 2
25908 | Postgre SQL | 15990 | 2
1501 | Python | 2031 | 2
190 | Java by API | 16 | 6
1234 | 2D | 25041 | 3
2038 | C | 1644 | 0
156 | C++ | 115 | 9
41473 | Programming Python | 7805 | 4
41477 | Learning Python | 7805 | 4
41478 | Perl Cookbook | 7806 | 4
41472 | Practical PostgreSQL | 1212 | 4
(15 rows)
postgres=#
postgres=# -- Comparing sub-query result sets
postgres=#
postgres=# (SELECT title FROM books ORDER BY title DESC LIMIT 7)
postgres-# EXCEPT
postgres-# (SELECT title FROM books ORDER BY title ASC LIMIT 11)
postgres-# ORDER BY title DESC;
title
----------------------
Sql Server
Python
Programming Python
Practical PostgreSQL
(4 rows)
postgres=#
postgres=#
postgres=# drop table books;
DROP TABLE
postgres=#
postgres=#
|