Web hosting ecommerce - Figure 12-8: Musicians, bands, online advertisements OLTP database
Figure 12-8: Musicians, bands, online advertisements OLTP database model. How It Works There are no appropriate CHECK constraints and no appropriate stored encoding. This script contains appropriate changes: CREATE TABLE INSTRUMENT ( INSTRUMENT_ID INTEGER PRIMARY KEY NOT NULL, SECTION_ID INTEGER FOREIGN KEY REFERENCES INSTRUMENT WITH NULL, INSTRUMENT CHAR VARYING(32) UNIQUE NOT NULL ); CREATE TABLE GENRE ( GENRE_ID INTEGER PRIMARY KEY NOT NULL, PARENT_ID INTEGER FOREIGN KEY REFERENCES GENRE WITH NULL, GENRE CHAR VARYING(32) UNIQUE NOT NULL ); CREATE TABLE VENUE Musician musician_id instrument_id (FK) band_id (FK) musician phone email skills Advertisement advertisement_id band_id (FK) musician_id (FK) date text Band band_id genre_id (FK) band founding_date Venue venue_id location address_line_1 address_line_2 town zip postal_code country directions phone Merchandise merchandise_id band_id (FK) type price Show show_id band_id (FK) venue_id (FK) date time Genre genre_id parent_id (FK) genre Instrument instrument_id section_id (FK) instrument Discography discography_id band_id (FK) cd_name release_date price 375 Business Rules and Field Settings
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