Exercise 8.7 If you were about to create an index on a relation, what considerations would guide your choice? Discuss: 1. The choice of primary index. 2. Clustered versus unclustered indexes. 3. Hash versus tree indexes. 4. The use of a sorted file rather than a tree-based index. 5. Choice of search key for the index. What is a composite search key, and what considerations are made in choosing composite search keys? What are index-only plans, and what is the influence of potential index-only evaluation plans on the choice of search key for an index?

Exercise 8.7 If you were about to create an index on a relation, what considerations would guide your choice? Discuss: 1. The choice of primary index. 2. Clustered versus unclustered indexes. 3. Hash versus tree indexes. 4. The use of a sorted file rather than a tree-based index. 5. Choice of search key for the index. What is a composite search key, and what considerations are made in choosing composite search keys? What are index-only plans, and what is the influence of potential index-only evaluation plans on the choice of search key for an index?

Computer Networking: A Top-Down Approach (7th Edition)

7th Edition

ISBN:9780133594140

Author:James Kurose, Keith Ross

Publisher:James Kurose, Keith Ross

Chapter1: Computer Networks And The Internet

Section: Chapter Questions

Problem R1RQ: What is the difference between a host and an end system? List several different types of end...

See similar textbooks

Related questions

Q: ideas 9. Suppose relation R(A,B,CD) has the following functional dependencies 1-B, B- C, BC A, A D,…

A: The answer is

Q: Consider the relation R = {F, T, D, N, S} and the set of functional dependencies K = {F¬D, {D, T}…

Q: Why is it important to achieve the lossless-join property in relation schema decomposition? (a) to…

A: Lossless join property: In the relation schema decomposition, the lossless join is the property…

Q: Consider the relation R = {F, T, D, N, S} and the set of functional dependencies K = {F¬D, {D, T}…

A: Answer : { T , N } is a key of Relation R .

Q: 2. Consider the relations Students, Faculty, Courses, Rooms, Enrolled, Teaches, and MeetsIn defined…

A: Relational Model A relation is a table with columns and rows. It is based on the mathematical…

Q: 2. Consider the relations Students, Faculty, Courses, Rooms, Enrolled, Teaches, and MeetsIn defined…

A: We are provided with 7 relations : Students, Faculty, Courses, Rooms, Enrolled, Teaches, MeetsIn…

Q: Assume we have two relations R(A, B) and S(B, C). Assume that R = {(1, 2),(2, 3),(3, 4)}, and S =…

A: Answer:-

Q: Q4. Suppose we have the following relations: R(A,B,C) and S(D,E,F). Assume that R uses 500 blocks on…

A: The answer is given below::--

Q: 1. Consider the following relations: Student (snum: integer, sname: string, major: string, level:…

A: Student (snum: integer, sname: string, major: string, level: string, age: integer) Class (name:…

Q: Let relations r1(A, B, C) and r2(C, D, E) have the following properties: r1 has20,000 tuples, r2 has…

A: r1 requires 800 blocks and r2 requires 1500 blocks. Let assume M pages of memory. If M > 800, the…

Q: 6. Consider the following query Q over R(A,B,C) and S(D,E,F): SELECT A,F FROM R, S WHERE C=D AND A <…

A: Answer:

Q: Question 3. . Consider the following two command C1 and C2 on the relation R from an SQL database:…

A: DROP TABLE: DROP TABLE statement is used to drop an existing table in a database. Syntax is DROP…

Q: 1 The performance of hash table O A Related to the method of handling conflicts, not the length of…

A: Based on our rules, we should answer only the first question when multiple questions are posted.…

Q: 1. what is classification? Give an example of Classification with source code and explain how it…

A: Basically in machine learning classification is a supervised learning approach where computer learns…

Q: 32 of 40 Suppose attribute A is a key in the relation R. Which of the following statements is not…

A: Attribute A is a key in given relation R. And we have to check, which statement is not correct in…

Q: 31. A primary key combined with a foreign key creates: A. Parent-child relationship between the…

Q: Q6. Consider the following query Q over R(A,B,C) and S(D,E,F): SELECT A,F FROM R, S WHERE C=D AND A…

A: SUMMARY: - hence we discussed all the points.

Q: Q6. Consider the following query Q over R(A,B,C) and S(D,E,F): SELECT A,F FROM R, S WHERE C=D AND A…

A: ANSWER:

Q: Consider the relations section and takes. Give an example instance of these two relations, with…

A: Explanation: The below is the relation section which has seven attributes and three tuples. The…

Q: Consider the relations section and takes. Give an example instance of these two relations, with…

A: Explanation: The below is the relation section which has seven attributes and three tuples. The…

Q: State nine rules of thumb for choosing indexes.

A: State nine rules of thumb for choosing indexes.

Q: State nine rules of thumb for choosing indexes.

A: 1. Indexing all primary keys. 2. Indexing all foreign key columns. 3. Creating Indexes only if…

Q: Computer Science Select table by your choice Apply horizontal fragmentation on it by using set of…

A: Horizontal fragmentation: In horizontal fragmentation, table rows are dived into…

Q: Consider the following relations: Student (snum: integer, sname: string, major: string, level:…

A: Given Relations: Student (snum: integer, sname: string, major: string, level: string, age:…

Q: Let relations r1(A, B, C) and r2(C, D, E) have the following properties: r1 has20,000 tuples, r2 has…

A: Block nested-loop join: The “r1” needs (20000/25)=800 blocks and “r2” needs (45000/30)=1500 blocks.…

Q: QUESTION 8 Here's a relation (R), its attributes, and its functional dependencies (F): R(A, B, C, D,…

A: A functional dependency is defined as if in a relation A→B , the values in attribute A have the same…

Q: Define an index and view. Create each as an example

A: SQL technique: views and indexes A view is simply any SELECT query that has been given a name and…

Q: Given the relation below named Student_Registration , answer the following questions. S_id…

A: Relational Schema: A relational schema in a database gives a outline of how data is organized in a…

Q: A major goal of normalization is minimizing redundant data a O clarifying field names b O selecting…

A: Lets see the solution.

Q: Consider the following relation Teacher (tech_id: integer, sal: integer, age: real, did: integer)…

A: 1) Given that there is 2 clustered index on ‘Tech_id+ To enforce key constraint on Tech_id’ column,…

Q: a) Indexes are data structures that allow finding record ids of records with given values in index…

A: SUMMARY: - hence we discussed all the points.

Q: Exercise 11.7 Consider a relation R(a, b, c, d) containing 1 million records, where each page of the…

A: Please find the answer below:

Q: Suppose a single relation (table) is used to record the information about students’ enrollment in…

A: Actually, given question regarding normalization.

Q: Here's a relation (R), its attributes and its functional dependencies (F): R(A, B, C, D, E, F, G)…

A: Given functional dependencies: BC -> DG CD -> F FG -> A 1. Closure of {ACD}+ is: {ACD}+ =…

Q: Create a database( e.g. Movie database, CD collection etc.) Use a RDBMS (e.g. MYSQL, MS Access, MS…

A: For creation of database, first sample data is required. so, last option is correct. Based on the…

Q: Consider the following relation with 150,000 tuples, stored in 3,000 pages: STUDENTS(SID, Name,…

A: Answer: I have given answer.

Q: E4.5a Using the AIRPORT KLX Table, describe an example that illustrates the insertion anomaly. E4.5b…

A: E4.5a solution :-If a new terminal needs be added which is not operational , no Airline has been…

Q: Consider the following query Q over R(A,B,C) and S(D,E,F): SELECT A,F FROM R, S WHERE C=D AND A <…

A: Given The answer is given below.

Q: Consider the following query Q over R(A,B,C) and S(D,E,F): SELECT A,F FROM R, S WHERE C=D AND A <…

A: ANSWER:

Q: Table: Student Table: Participate Table: Course studentld address studentld courseld courseld…

A: There are five relational tables in the given database. These tables are as follows. 1) Student 2)…

Q: to asked question. Q.No.2. Suppose there is a MySQL database named MyDatabase, the name of…

A: Database output can't be shown as the server metioned is something which can't be run in local…

Q: QUESTION 9 A relation R(M, N, O, P, Q) is in 2NF and has the following functional dependencies: • MN…

A: Dear Student, As MN derives O and O derives P and also Q thus MN derives M,N,O,P,Q. Thus MN is a…

Q: Define and discuss the advantages & disadvantages of materalized view in database?

A: Materialized View:- Unlike normal VIEWs, the materialized views are specific views that take on…

Q: What's the difference between closed and open hashing? Discuss the relative merits of each database…

A: Hashing is used in database for faster retrieval of data items. OPEN HASHING CLOSED…

Q: 2.1 In which Normal Form is the above table? Explain how you arrived at your answer. 22 Explain the…

A: The given problem is related to the normalization process of a database table where the requirement…