Web site - How It Works There are no appropriate CHECK
How It Works There are no appropriate CHECK constraints and no appropriate stored encoding. Remember that input to a data warehouse is unlikely to be manual input, so input MASK settings and CHECK constraints generally do not apply. Additionally, UNIQUE constraints are not needed either (they are overhead) when data is application generated anyway. 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) NOT NULL ); CREATE TABLE MUSICIAN ( MUSICIAN_ID INTEGER PRIMARY KEY NOT NULL, MUSICIAN CHAR VARYING(32) NOT NULL, PHONE CHAR VARYING(32) NULL, EMAIL CHAR VARYING(32) NULL ); CREATE TABLE GENRE ( GENRE_ID INTEGER PRIMARY KEY NOT NULL, PARENT_ID INTEGER FOREIGN KEY REFERENCES GENRE WITH NULL, GENRE CHAR VARYING(32) NOT NULL ); CREATE TABLE BAND ( BAND_ID INTEGER PRIMARY KEY NOT NULL, BAND CHAR VARYING(32) NOT NULL, FOUNDING_DATE DATE FORMAT DD MON, YEAR NOT NULL ); CREATE TABLE ADVERTISEMENT ( ADVERTISEMENT_ID INTEGER PRIMARY KEY NOT NULL, DATE DATE FORMAT DD MON, YEAR NOT NULL, TEXT MEMO NOT NULL ); CREATE TABLE DISCOGRAPHY ( DISCOGRAPHY_ID INTEGER PRIMARY KEY NOT NULL, CD_NAME CHAR VARYING(32) NOT NULL, RELEASE_DATE DATE FORMAT DD MON, YEAR NULL, PRICE MONEY FORMAT $9,999,990.99 NULL ); CREATE TABLE MERCHANDISE ( MERCHANDISE_ID INTEGER PRIMARY KEY NOT NULL, TYPE CHAR VARYING(32) NOT NULL, 378 Chapter 12
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