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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=# CREATE TABLE editions
postgres-# (isbn text,
postgres(# book_id integer,
postgres(# edition integer,
postgres(# publisher_id integer,
postgres(# publication date,
postgres(# type char,
postgres(# CONSTRAINT pkey PRIMARY KEY (isbn),
postgres(# CONSTRAINT integrity CHECK (book_id IS NOT NULL
postgres(# AND edition IS NOT NULL),
postgres(# CONSTRAINT book_exists FOREIGN KEY (book_id)
postgres(# REFERENCES books (id)
postgres(# ON DELETE CASCADE
postgres(# ON UPDATE CASCADE);
NOTICE: CREATE TABLE / PRIMARY KEY will create implicit index "pkey" for table "editions"
CREATE TABLE
postgres=#
postgres=# drop table books cascade;
NOTICE: drop cascades to constraint book_exists on table editions
DROP TABLE
postgres=# drop table editions cascade;
DROP TABLE
postgres=#
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