Type ISBN eBook RelationName2 (AttrName1) Primary key {AttrName1) Price Book N Order Hardcopy Date Quantity RelationName1 (AttrName1, AttrName2) Primary key {AttrName1} Foreign key {AttrName2} references RelationName2 (AttrName1) M CoverStyle Customer Id Date Name Has Convert the following E-R diagram to a collection of relations. Determine all the primary and foreign keys. Use the following format to answer the question: Payment No

Type ISBN eBook RelationName2 (AttrName1) Primary key {AttrName1) Price Book N Order Hardcopy Date Quantity RelationName1 (AttrName1, AttrName2) Primary key {AttrName1} Foreign key {AttrName2} references RelationName2 (AttrName1) M CoverStyle Customer Id Date Name Has Convert the following E-R diagram to a collection of relations. Determine all the primary and foreign keys. Use the following format to answer the question: Payment No

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Similar questions

What three situations make it necessary to make a substitute key instead of the main key of a relation?
Which of the following is true? BCNF and 3NF are same. A relation in BCNF is always in ONF A relation in BCNF is not in 3NE A relation in 3NF is always in BCNF.
Task Description: Consider the following relations for a company: Department (Did: integer, Dname: string, location: string) Employee (Eid: integer, Ename: string, Erank: integer, salary: real, DepartmentID, integer) Project (Pid: integer, DepartmentID: integer, Pname: string, budget: real, start year: integer) The “DepartmentID” fields in both Employee and Project are foreign keys referencing the “Did”field of the Department table. Use SQL to create a new database (named MyCompany), then use it to build the relations mentioned above. Place the constraints (e.g., default values) you find appropriate.
How many of the relations in Johnny's logical database design have a composite primary key?
a) Complete the object conceptual data model for the following relational schema. Branch BranchID Location B001 Shatin ВО02 Homantin Order OrderID SalesTotal BranchID 0001 100 BO01 0002 200 BO02 0003 300 BO01 BranchID is the primary key of Branch table. OrderID is the primary key of Order table. BranchID in Order table is the foreign key references Branch table. Now, assume the OIDS are given below: Branch BranchID Location OID B001 Shatin OID1 B002 Homantin OID2 Order OrderID SalesTotal BranchID OID 0001 100 ВО01 OID3 0002 200 ВО02 OID4 0003 300 ВО01 OID5
15. Circle all areas that break the referential integrity constraint. (8 Points) Not a Relational Table EmpID EmpInfo EmpInfo EmpPhone 0001 Joe 0002 Sue 0001 Joe 0004 Pat 0005 Mike M FMF M x234 x345 x234 x567, x789 x678 EmpBdate 1/11/1985 2/7/1983 1/11/1985 3/8/1971 a long time ago
q16
None
Please convert this EERD to RELATION. Thanks! Use arrow to identify the foreign key, not only box and tell where is the foreign key. Draw it in paper, thanks!!!
Q2/ Map your ER into a relational schema. All constraints must be included: Primary keys (PK) highlighted, foreign keys (FK) well referring to their PK, unique not null and other constraints also specified. Name PUBLISHER Phone Address publish Author_id Book_id M BOOK AUTHOR Has Titele M Name Date_out Loan Due_date phone f name I name BORROWER address Card id F_name
One of the components of a composite primary key might be a candidate key. What would you do if you found out this?
Consider the following relational schema. titles employees emp_ne NUMERICE 0) emp ne NUMERICEO) title CHARACTER VARYING) from date DATE to date DATE birth date DATE first mame CHARACTER VARYING(14 last name CHARACTER VARYING(16) gender CHARACTER) hire date DATE salaries emp ne NUMERICE0) salary NUMERIC6.0) from_date DATE te date DATE dept_manager dept_no CHARACTERIA emp no ERICISO from date DATE to date DATE departments dept ne CHARACTERIA) dept_name CHARACTER VARYINOJAO) dept_emp emp ne NUMERICS dept ne CHARACTER() from date DATE date DATE The salaries table has the primary key named emp_no. The titles table has the primary key named emp_no. • The employees table has the primary key named emp_no. The dept_manager table has the composite primary key named (dept_no, emp_no). The dept_emp table has the composite primary key named (emp_no, dept_no). The departments table has the primary key named dept_no. The salaries table has a foreign key column named emp_no that references the…