Modern Database Management
Modern Database Management
13th Edition
ISBN: 9780134792293
Author: Hoffer
Publisher: PEARSON
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Chapter 5, Problem 5.54PAE
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SQL query to find tutors who have a Dropped status and have achieved their certification after 4/01/2018.

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2. Signed Integers Unsigned binary numbers work for natural numbers, but many calculations use negative numbers as well. To deal with this, a number of different methods have been used to represent signed numbers, but we will focus on two's complement, as it is the standard solution for representing signed integers. 2.1 Two's complement • Most significant bit has a negative value, all others are positive. So, the value of an n-digit -2 two's complement number can be written as: Σ2 2¹ di 2n-1 dn • Otherwise exactly the same as unsigned integers. i=0 - • A neat trick for flipping the sign of a two's complement number: flip all the bits (0 becomes 1, or 1 becomes 0) and then add 1 to the least significant bit. • Addition is exactly the same as with an unsigned number. 2.2 Exercises For questions 1-3, answer each one for the case of a two's complement number and an unsigned number, indicating if it cannot be answered with a specific representation. 1. (15 pts) What is the largest integer…
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1. Unsigned Integers If we have an n-digit unsigned numeral dn-1d n-2...do in radix (or base) r, then the value of that numeral is n−1 r² di Σi=0 which is basically saying that instead of a 10's or 100's place we have an r's or r²'s place. For binary, decimal, and hex r equals 2, 10, and 16, respectively. Just a reminder that in order to write down a large number, we typically use the IEC or SI prefixing system: IEC: Ki = 210, Mi = 220, Gi = 230, Ti = 240, Pi = 250, Ei = 260, Zi = 270, Yi = 280; SI: K=103, M = 106, G = 109, T = 10¹², P = 1015, E = 10¹8, Z = 1021, Y = 1024. 1.1 Conversions a. (15 pts) Write the following using IEC prefixes: 213, 223, 251, 272, 226, 244 21323 Ki8 Ki 223 23 Mi 8 Mi b. (15 pts) Write the following using SI prefixes: 107, 10¹7, 10¹¹, 1022, 1026, 1015 107 10¹ M = 10 M = 1017102 P = 100 P c. (10 pts) Write the following with powers of 10: 7 K, 100 E, 21 G 7 K = 7*10³

Chapter 5 Solutions

Modern Database Management

Ch. 5 - Prob. 5.11RQCh. 5 - Explain the purpose of indexing in database...Ch. 5 - What are the potential consequence of...Ch. 5 - Prob. 5.14RQCh. 5 - Explain and provide at least one example Of how to...Ch. 5 - Prob. 5.16RQCh. 5 - What is the difference between COUNT, COUNT...Ch. 5 - What is the evaluation order for the Boolean...Ch. 5 - If an SQL statement includes a GROUP BY clause,...Ch. 5 - Prob. 5.20RQCh. 5 - Prob. 5.21RQCh. 5 - Prob. 5.22RQCh. 5 - Explain why SQL is called a set-oriented language.Ch. 5 - When would the use of the LIKE key word with the...Ch. 5 - Prob. 5.25RQCh. 5 - Prob. 5.26RQCh. 5 - In what order are the clauses of an SQL statement...Ch. 5 - Within which clauses of an SQL statement can a...Ch. 5 - Prob. 5.29RQCh. 5 - Prob. 5.30RQCh. 5 - Prob. 5.31RQCh. 5 - Explain the difference between the WHERE and...Ch. 5 - Prob. 5.33RQCh. 5 - Write a database description for each of the...Ch. 5 - Analyze the database to determine whether or not...Ch. 5 - Prob. 5.36PAECh. 5 - To enforce referential integrity, before any row...Ch. 5 - Write SQL data definition commands for each of the...Ch. 5 - Write SQL commands for the following: Create two...Ch. 5 - Write SQL queries to answer the following...Ch. 5 - Write SQL queries to answer the following...Ch. 5 - Write SQL queries to answer the following...Ch. 5 - Write SQL queries to answer the following...Ch. 5 - Prob. 5.44PAECh. 5 - Prob. 5.45PAECh. 5 - Prob. 5.46PAECh. 5 - What is the average Read score for all students?...Ch. 5 - Prob. 5.48PAECh. 5 - What are the TutorIDs for tutors who have not yet...Ch. 5 - Prob. 5.50PAECh. 5 - Prob. 5.51PAECh. 5 - Prob. 5.52PAECh. 5 - Prob. 5.53PAECh. 5 - Prob. 5.54PAECh. 5 - How many tutors have an Active status in the...Ch. 5 - Prob. 5.56PAECh. 5 - Modify the Product_T table by adding an attribute...Ch. 5 - Enter sample data of your own choosing into...Ch. 5 - Add an order to the Order_T table and include a...Ch. 5 - Use the Pine Valley database to answer the...Ch. 5 - Prob. 5.61PAECh. 5 - Prob. 5.62PAECh. 5 - Prob. 5.63PAECh. 5 - Prob. 5.64PAECh. 5 - Prob. 5.65PAECh. 5 - Prob. 5.66PAECh. 5 - Prob. 5.67PAECh. 5 - Modify query in P&E 5-67 by considering only those...Ch. 5 - Prob. 5.69PAECh. 5 - Prob. 5.70PAECh. 5 - Prob. 5.71PAECh. 5 - Prob. 5.72PAECh. 5 - Prob. 5.73PAECh. 5 - Prob. 5.74PAECh. 5 - Prob. 5.75PAECh. 5 - Prob. 5.76PAECh. 5 - Prob. 5.77PAECh. 5 - Assume that for those materials the ID of which...Ch. 5 - Prob. 5.79PAECh. 5 - Prob. 5.80PAECh. 5 - Prob. 5.81PAECh. 5 - Prob. 5.82PAECh. 5 - Prob. 5.83PAECh. 5 - Prob. 5.84PAECh. 5 - Prob. 5.85PAECh. 5 - Prob. 5.86PAECh. 5 - Prob. 5.87PAECh. 5 - Prob. 5.88PAECh. 5 - Prob. 5.89PAECh. 5 - Prob. 5.90PAECh. 5 - Prob. 5.91PAECh. 5 - Prob. 5.92PAECh. 5 - Prob. 5.93PAE
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