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ISYS1055 Database Concepts Assignment 1

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Semantics of attributes is self-explanatory. Some additional notes are as follow: Give the relation schema for each table to ensure data integrity

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ISYS1055 Database Concepts Assignment 1
Topics this document covers:
Data management Information retrieval SQL keywords Data modeling SQL Databases Unique key Null Foreign key Insert
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Topics this document covers:
Data management Information retrieval SQL keywords Data modeling SQL Databases Unique key Null Foreign key Insert
Sample Text:
AUTHOR (name, authorBio) BOOK (isbn, title, edition, price, publisher, pubAddr, year) WRITE (author-name*, isbn*) Answer Explanation: ● Every author has a unique name which is definitely set as a PRIMARY KEY. ● Each book has a unique isbn which is the PRIMARY KEY for BOOK relation. Moreover, the attributions of book involve ‘title, edition, price, publisher, pubAddr, and year’. ● Values appearing in attributes of relation ‘WRITE’ must appear in the PRIMARY KEY attributes to another relation ‘AUTHOR and BOOK’. There attributes comprise a FOREIGN KEY in ‘WRITE’ that references the PRIMARY KEY of ‘AUTHOR, BOOK’. b). Write SQL CREATE TABLE and INSERT statements to define the relation schemas. drop table WRITE; drop table BOOK; drop table AUTHOR; create table AUTHOR ( name VARCHAR(30), authorBio VARCH...
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