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MERCHANDISE_ID INTEGER PRIMARY KEY NOT NULL, TYPE CHAR VARYING(32) NOT NULL, PRICE MONEY NOT NULL ); CREATE TABLE SHOW_VENUE ( SHOW_ID INTEGER PRIMARY KEY NOT NULL, LOCATION CHAR VARYING(32) NOT NULL, ADDRESS_LINE_1 CHAR VARYING(32) NOT NULL, ADDRESS_LINE_2 CHAR VARYING(32) NULL, TOWN CHAR VARYING(32) NOT NULL, ZIP NUMBER(5) NULL, POSTAL_CODE CHAR VARYING(32) NULL, COUNTRY CHAR VARYING(32) NULL, DIRECTIONS MEMO NULL, PHONE CHAR VARYING(32) NULL SHOW_DATE DATE NOT NULL, SHOW_TIME CHAR VARYING(16) NOT NULL ); VENUE is changed to LOCATION CREATE TABLE FACT ( FACT_ID INTEGER NOT NULL, SHOW_ID INTEGER FOREIGN KEY REFERENCES SHOW WITH NULL, MUSICIAN_ID INTEGER FOREIGN KEY REFERENCES MUSICIAN WITH NULL, BAND_ID INTEGER FOREIGN KEY REFERENCES BAND WITH NULL, ADVERTISEMENT_ID INTEGER FOREIGN KEY REFERENCES ADVERTISEMENT WITH NULL, DISCOGRAPHY_ID INTEGER FOREIGN KEY REFERENCES DISCOGRAPHY WITH NULL, MERCHANDISE_ID INTEGER FOREIGN KEY REFERENCES MERCHANDISE WITH NULL, GENRE_ID INTEGER FOREIGN KEY REFERENCES GENRE WITH NULL, INSTRUMENT_ID INTEGER FOREIGN KEY REFERENCES INSTRUMENT WITH NULL,
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MUSICIAN_ID INTEGER FOREIGN KEY REFERENCES MUSICIAN WITH NULL, DATE DATE NOT NULL, TEXT MEMO NOT NULL ); The Microsoft Access MEMO datatype is used to represent very large strings. Exercise 2 solution 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 NOT NULL ); CREATE TABLE ADVERTISEMENT ( ADVERTISEMENT_ID INTEGER PRIMARY KEY NOT NULL, DATE DATE 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 NULL, PRICE MONEY NULL ); CREATE TABLE MERCHANDISE ( 433 Exercise Answers
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POSTAL_CODE CHAR VARYING(32) NULL, COUNTRY CHAR VARYING(32) NULL, DIRECTIONS MEMO NULL, PHONE CHAR VARYING(32) NULL ); CREATE TABLE MERCHANDISE ( MERCHANDISE_ID INTEGER PRIMARY KEY NOT NULL, BAND_ID INTEGER FOREIGN KEY REFERENCES BAND NOT NULL, TYPE CHAR VARYING(32) NOT NULL, PRICE MONEY NOT NULL ); CREATE TABLE DISCOGRAPHY ( DISCOGRAPHY_ID INTEGER PRIMARY KEY NOT NULL, BAND_ID INTEGER FOREIGN REFERENCES BAND NOT NULL, CD_NAME CHAR VARYING(32) NOT NULL, RELEASE_DATE DATE NULL, PRICE MONEY NULL ); CREATE TABLE SHOW ( SHOW_ID INTEGER PRIMARY KEY NOT NULL, BAND_ID INTEGER FOREIGN KEY REFERENCES BAND NOT NULL, VENUE_ID INTEGER FOREIGN KEY REFERENES VENUE NOT NULL, DATE DATE NOT NULL, TIME CHAR VARYING(16) NOT NULL ); CREATE TABLE BAND ( BAND_ID INTEGER PRIMARY KEY NOT NULL, GENRE_ID INTEGER FOREIGN KEY REFERENCES GENRE NOT NULL, BAND CHAR VARYING(32) NOT NULL, FOUNDING_DATE DATE NOT NULL ); CREATE TABLE MUSICIAN ( MUSICIAN_ID INTEGER PRIMARY KEY NOT NULL, INSTRUMENT_ID INTEGER FOREIGN KEY REFERENCES INSTRUMENT NOT NULL, BAND_ID INTEGER FOREIGN KEY REFERENCES BAND WITH NULL, MUSICIAN CHAR VARYING(32) NOT NULL, PHONE CHAR VARYING(32) NULL, EMAIL CHAR VARYING(32) NULL, SKILLS CHAR VARYING(256) NULL ); CREATE TABLE ADVERTISEMENT ( ADVERTISEMENT_ID INTEGER PRIMARY KEY NOT NULL, BAND_ID INTEGER FOREIGN KEY REFERENCES BAND WITH NULL, 432 Appendix A
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PRICE MONEY NULL ); CREATE TABLE ARTISTS ( ARTIST_ID INTEGER PRIMARY KEY, MERCHANDISE_ID INTEGER FOREIGN KEY REFERENCES MERCHANDISE WITH NULL, GENRE_ID INTEGER FOREIGN KEY REFERENCES GENRE WITH NULL, INSTRUMENT_ID INTEGER FOREIGN KEY REFERENCES INSTRUMENT WITH NULL, MUSICIAN_NAME STRING NULL, MUSICIAN_PHONE STRING NULL, MUSICIAN_EMAIL STRING NULL, BAND_NAME STRING NULL, BAND_FOUNDING_DATE DATE NULL, DISCOGRAPHY_CD_NAME STRING NULL, DISCOGRAPHY_RELEASE_DATE DATE NULL, DISCOGRAPHY_PRICE MONEY NULL, SHOW_DATE DATE NULL, SHOW_TIME STRING NULL, VENUE_NAME STRING NULL, VENUE_ADDRESS STRING NULL, VENUE_DIRECTIONS BIGSTRING NULL, VENUE_PHONE STRING NULL, ADVERTISEMENT_DATE DATE NULL, ADVERTISEMENT_TEXT BIGSTRING NULL ); Chapter 11 Exercise 1 solution 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 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 VENUE ( VENUE_ID INTEGER PRIMARY KEY NOT NULL, LOCATION CHAR VARYING(32) NOT NULL, ADDRESS_LINE_1 CHAR VARYING(32) NOT NULL, ADDRESS_LINE_2 CHAR VARYING(32) NULL, TOWN CHAR VARYING(32) NOT NULL, ZIP NUMBER(5) NULL, 431 Exercise Answers
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CD_NAME STRING NOT NULL, RELEASE_DATE DATE NULL, PRICE MONEY NULL ); CREATE TABLE SHOW ( SHOW_ID INTEGER PRIMARY_KEY, VENUE_ID INTEGER FOREIGN KEY REFERENCES VENUE, BAND_ID INTEGER FOREIGN KEY REFERENCES BAND, DATE DATE NULL, TIME STRING NULL ); CREATE TABLE MUSICIAN ( MUSICIAN_ID INTEGER PRIMARY KEY, INSTRUMENT_ID INTEGER FOREIGN KEY REFERENCES INSTRUMENT, BAND_ID INTEGER FOREIGN KEY REFERENCES BAND, MUSICIAN STRING NOT NULL, PHONE STRING NULL, EMAIL STRING NULL, SKILLS STRING NULL ); CREATE TABLE ADVERTISEMENT ( ADVERTISEMENT_ID INTEGER PRIMARY KEY, BAND_ID INTEGER FOREIGN KEY REFERENCES BAND, MUSICIAN_ID INTEGER FOREIGN KEY REFERENCES MUSICIAN, AD_DATE DATE NULL, AD_TEXT BIGSTRING NULL ); Exercise 2 solution CREATE TABLE INSTRUMENT ( INSTRUMENT_ID INTEGER PRIMARY KEY, SECTION_ID INTEGER FOREIGN KEY REFERENCES INSTRUMENT WITH NULL, INSTRUMENT STRING NOT NULL ); CREATE TABLE GENRE ( GENRE_ID INTEGER PRIMARY KEY, PARENT_ID INTEGER FOREIGN KEY REFERENCES GENRE WITH NULL, GENRE STRING NOT NULL ); CREATE TABLE MERCHANDISE ( MERCHANDISE_ID INTEGER PRIMARY KEY, TYPE STRING NOT NULL, 430 Appendix A
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Chapter 10 Exercise 1 solution CREATE TABLE INSTRUMENT ( INSTRUMENT_ID INTEGER PRIMARY KEY, SECTION_ID INTEGER FOREIGN KEY REFERENCES INSTRUMENT WITH NULL, INSTRUMENT STRING NOT NULL ); INSTRUMENT is NOT NULL, because there is no point in storing an instrument without a name. CREATE TABLE GENRE ( GENRE_ID INTEGER PRIMARY KEY, PARENT_ID INTEGER FOREIGN KEY REFERENCES GENRE WITH NULL, GENRE STRING NOT NULL ); CREATE TABLE VENUE ( VENUE_ID INTEGER PRIMARY KEY, VENUE STRING NOT NULL, ADDRESS STRING NULL, DIRECTIONS STRING NULL, PHONE STRING NULL ); The field for the name of the VENUE should be VENUE, not LOCATION. It is thus changed in the preceding script. CREATE TABLE BAND ( BAND_ID INTEGER PRIMARY KEY, GENRE_ID INTEGER FOREIGN KEY REFERENCES GENRE, BAND STRING NOT NULL, FOUNDING_DATE DATE NULL ); CREATE TABLE MERCHANDISE ( MERCHANDISE_ID INTEGER PRIMARY KEY, BAND_ID INTEGER FOREIGN KEY REFERENCES BAND, TYPE STRING NOT NULL, PRICE MONEY NULL ); CREATE TABLE DISCOGRAPHY ( DISCOGRAPHY_ID INTEGER PRIMARY KEY, BAND_ID INTEGER FOREIGN KEY REFERENCES BAND, 429 Exercise Answers
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Exercise 2 solution CREATE TABLE MUSICIAN ( NAME VARCHAR(32) NULL, PHONE VARCHAR(32) NULL, EMAIL VARCHAR(32) NULL, INSTRUMENTS VARCHAR(32) NULL, SKILLS VARCHAR(32) NULL ); CREATE TABLE SHOWS ( LOCATION VARCHAR(32) NULL, ADDRESS VARCHAR(32) NULL, DIRECTIONS VARCHAR(32) NULL, PHONE VARCHAR(32) NULL, SHOW_DATE DATE NULL, SHOW_TIMES VARCHAR(32) NULL ); CREATE TABLE MERCHANDISE ( TYPE VARCHAR(32) NULL, PRICE FLOAT NULL ); CREATE TABLE DISCOGRAPHY ( CD_NAME VARCHAR(32) NULL, RELEASE_DATE DATE NULL, PRICE FLOAT NULL ); CREATE TABLE BAND ( NAME VARCHAR(32) NULL, FOUNDING_DATE DATE NULL, GENRES VARACHAR(32) NULL ); CREATE TABLE ADVERTISEMENT ( AD_DATE DATE NULL, AD_TEXT VARCHAR(1000) NULL, AD_PHONE VARCHAR(32) NULL, AD_EMAIL VARCHAR(32) NULL, AD_REQUIREMENTS VARCHAR(1000) NULL ); 428 Appendix A
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Chapter 9 Exercise 1 solution CREATE TABLE INSTRUMENT(INSTRUMENT VARCHAR(32) NULL); CREATE TABLE SKILL(SKILL VARCHAR(32) NULL); CREATE TABLE GENRE(GENRE VARCHAR(32) NULL); CREATE TABLE MUSICIAN ( NAME VARCHAR(32) NULL, PHONE VARCHAR(32) NULL, EMAIL VARCHAR(32) NULL ); CREATE TABLE SHOWS ( LOCATION VARCHAR(32) NULL, ADDRESS VARCHAR(32) NULL, DIRECTIONS VARCHAR(32) NULL, PHONE VARCHAR(32) NULL, SHOW_DATE DATE NULL, SHOW_TIMES VARCHAR(32) NULL ); CREATE TABLE MERCHANDISE ( TYPE VARCHAR(32) NULL, PRICE FLOAT NULL ); CREATE TABLE DISCOGRAPHY ( CD_NAME VARCHAR(32) NULL, RELEASE_DATE DATE NULL, PRICE FLOAT NULL ); CREATE TABLE BAND ( NAME VARCHAR(32) NULL, MEMBERS VARCHAR(32) NULL, FOUNDING_DATE DATE NULL ); CREATE TABLE ADVERTISEMENT ( AD_DATE DATE NULL, AD_TEXT VARCHAR(1000) NULL, PHONE VARCHAR(32) NULL, EMAIL VARCHAR(32) NULL, REQUIREMENTS VARCHAR(1000) NULL ); 427 Exercise Answers
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–DISABLE THE ROYALTY.TRACK_ID FOREIGN KEY COLUMN — DROP TABLE TRACK; DROP TABLE CD; DROP TABLE BAND; CREATE TABLE TRACK AS SELECT * FROM TEMP; DROP TABLE TEMP; — –RENABLE THE ROYALTY.TRACK_ID FOREIGN KEY COLUMN, TO POINT AT THE NEW TRACK TABLE — Chapter 8 Exercise 1 solution High concurrency and real-time response to end-users are both correct answers: . Very High Concurrency Concurrency implies a very high degree of sharing of the same information. . Reaction Time Real-time, instantaneous reaction to database changes and activities are essential. If you withdraw cash from an ATM at your bank and then check your statement online in an hour or so, you would expect to see the transaction. Similarly, if you purchase something online, you would hope to see the transaction on your credit card account within minutes, if not seconds. Exercise 2 solution Very large database is the only correct answer: . Frightening Database Size Data warehouses can become incredibly large. Administrators and developers have to decide how much detail to retain, when to remove data, when to summarize, what to summarize. A lot of these decisions are done during production when the data warehouse is in use. Also, ad-hoc queries can cause serious problems because if the database is very large. User education in relation to how to code proper joins may be essential; otherwise, provision of efficiency providing structures such as pre-built joins and aggregations in materialized views can also help. Exercise 3 solution The number of tables in a join query is the best answer. Exercise 4 solution The second query is the best performing option because it finds a single record on a primary key, using the primary key index. The first option is a negative search and scans all records in the table, ignoring any indexing, searching for what is not in the table. 426 Appendix A
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QUARTER INTEGER NULL, YEAR INTEGER NULL ); CREATE TABLE LOCATION ( LOCATION_ID INTEGER PRIMARY KEY NOT NULL, CITY VARCHAR(32) NULL, COUNTY VARCHAR(32) NULL, STATE VARCHAR(32) NULL, COUNTRY VARCHAR(32) NULL ); CREATE TABLE RADIO ( STATION_ID INTEGER PRIMARY KEY NOT NULL, STATION VARCHAR(32) NULL ); CREATE TABLE PERFORMER ( PERFORMER_ID INTEGER PRIMARY KEY NOT NULL, PERFORMER VARCHAR(32) NULL ); CREATE TABLE RECORDINGARTIST ( RECORDING_ARTIST_ID INTEGER PRIMARY KEY NOT NULL, RECORDING_ARTIST VARCHAR(32) NULL ); CREATE TABLE ROYALTY ( ROYALTY_ID INTEGER PRIMARY KEY NOT NULL, TRACK_ID INTEGER REFERENCES TRACK NULL, RECORDING_ARTIST_ID INTEGER REFERENCES RECORDINGARTIST NULL, PERFORMER_ID INTEGER REFERENCES PERFORMER NULL, STATION_ID INTEGER REFERENCES RADIO NULL, LOCATION_ID INTEGER REFERENCES LOCATION NULL, TIME_ID INTEGER REFERENCES TIME NULL, AMOUNT FLOAT NOT NULL ); Exercise 2 solution CREATE TABLE TEMP AS SELECT B.NAME AS BAND_NAME, B.ADDRESS AS BAND.ADDRESS, B.PHONE AS BAND_PHONE, B.EMAIL AS BAND_EMAIL, CD.TITLE AS CD_TITLE, CD.LENGTH AS CD_LENGTH, CD.TRACKS AS CD_TRACKS,T.TRACK, T.LENGTH AS TRACK_LENGTH, T.GENRE AS TRACK_GENRE, T.CHART AS TRACK_CHART, T.RANK AS TRACK_RANK FROM BAND B JOIN CD CD JOIN TRACK T; — 425 Exercise Answers
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