EBK DATABASE SYSTEMS: DESIGN, IMPLEMENT
12th Edition
ISBN: 9781305886841
Author: Morris
Publisher: CENGAGE LEARNING - CONSIGNMENT
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Expert Solution & Answer
Chapter 11, Problem 11RQ
Explanation of Solution
Optimizer hint and its usage:
- Special instructions that are embedded inside the SQL (Structured Query Language) command test for the optimizer is called as optimizer hints.
- Optimizer performs well in choice of the best execution plan in most of the circumstances and there are some situations where the optimizer fails to choose the best execution plan.
- Based on the statistics that exists an optimizer makes decision.
- The statistics that are obtained by the optimizer can be old and that could be the reason for most of optimizer not chooses the best execution plan.
- There are situations where even though a good statistics are obtained, the choice made by the optimizer may not be worthy...
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Année scolaire: 2024/2025
Collège SMARA
Devoir à domicile 1 semestre 2
Prof: NILAJ
PHYSIQUE CHIMIE
Nom et Prénom:
Niveau: 3APIC
Exercice 1:
Durée: 1 heure
1) Donner la définition des termes suivantes?
Le Mouvement :
La vitesse moyenne:
2) Répondre par « Vrai » ou «>
Un objet peut être en mouvement et au repos
Si la vitesse est constante, le mouvement sera uniforme.
3) Compléter les phrases par les termes qui conviennent :
Pour déterminer le mouvement ou le repos d'un objet, vous devez choisir un autre objet appelé le
d'un point d'un corps mobile est l'ensemble des positions qu'il
occupe durant son mouvement.
Il y a trois types de trajectoires: circulaire.
La distance de freinage dépend de
4) Cocher la bonne réponse?
> La relation entre la vitesse, la distance et le temps:
d
Vm = dxt
> L'unité internationale de la vitesse moyenne est :
m/s
5) On considère la figure suivante :
Compléter le tableau par les mots suivants :
En mouvement au repos
A
C
Km/h
et
et l'
m. s-1
15
A
B
C
Sol…
5. Here is a tree corresponding to T(64) for an unknown recurrence relation:
32 + lg 64
8+ lg 16
2+ lg 4
2+lg4
2+lg4
8+ lg 16
2+lg4
7
7
7
7
7
7
7
7
Fill in the details for the corresponding recurrence relation:
T(n) =
T(n/4)+
T(1)=
Put scratch work below. Scratch work is not graded but may be used for regrade
partial credit.
Top screenshot is question, the rest are examples and explinations.
Chapter 11 Solutions
EBK DATABASE SYSTEMS: DESIGN, IMPLEMENT
Ch. 11 - Prob. 1RQCh. 11 - What index should you create? Write the required...Ch. 11 - What is the focus of most performance-tuning...Ch. 11 - What are database statistics, and why are they...Ch. 11 - How are database statistics obtained?Ch. 11 - What database statistics measurements are typical...Ch. 11 - How is the processing of SQL DDL statements (such...Ch. 11 - In simple terms, the DBMS processes a query in...Ch. 11 - If indexes are so important, why not index every...Ch. 11 - What is the difference between a rule-based...
Ch. 11 - Prob. 11RQCh. 11 - What are some general guidelines for creating and...Ch. 11 - Prob. 13RQCh. 11 - Prob. 14RQCh. 11 - Prob. 15RQCh. 11 - SELECT EMP_LNAME, EMP_FNAME, EMP_AREACODE, EMP_SEX...Ch. 11 - Problem 1 and 2 are based on the following query:...Ch. 11 - Using Table 11.4 as an example, create two...Ch. 11 - Problems 46 are based on the following query:...Ch. 11 - Problems 46 are based on the following query:...Ch. 11 - Prob. 6PCh. 11 - Problems 732 are based on the ER model shown in...Ch. 11 - Problems 732 are based on the ER model shown in...Ch. 11 - Problems 732 are based on the ER model shown in...Ch. 11 - Problems 732 are based on the ER model shown in...Ch. 11 - Problems 1114 are based on the following query:...Ch. 11 - Problems 1114 are based on the following query:...Ch. 11 - Problems 1114 are based on the following query:...Ch. 11 - Problems 1114 are based on the following query:...Ch. 11 - Problems 15 and 16 are based on the following...Ch. 11 - Problems 15 and 16 are based on the following...Ch. 11 - Problems 1721 are based on the following query:...Ch. 11 - Problems 1721 are based on the following query:...Ch. 11 - Prob. 19PCh. 11 - Prob. 20PCh. 11 - Problems 1721 are based on the following query:...Ch. 11 - SELECT P_CODE, P_DESCRIPT, P_PRICE, P.V_CODE,...Ch. 11 - Problems 2224 are based on the following query:...Ch. 11 - Problems 2224 are based on the following query:...Ch. 11 - Problems 25 and 26 are based on the following...Ch. 11 - Problems 25 and 26 are based on the following...Ch. 11 - Prob. 27PCh. 11 - Problems 27 and 28 are based on the following...Ch. 11 - Problems 2932 are based on the following query:...Ch. 11 - Problems 2932 are based on the following query:...Ch. 11 - Problems 2932 are based on the following query:...Ch. 11 - Problems 2932 are based on the following query:...
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