SlideShare a Scribd company logo
1 of 1
Download to read offline
Which of the following is true about indexes and index design? a. indexes usually speed up
write operations b. a composite index is an index on a single column c. indexes should be
created on columns used by WHERE and BY clauses d. an index is created for every foreign
key by default
Solution
Answer: Indexes should be created on columns used by WHERE and BY clauses.
Indexes are used for retrieve the records fast. So we have to mention the column names in
WHERE clause and By clause in which we created the columns for fast retrieval of the records.

More Related Content

More from arshin9

What is the between facial action unit and facial landmark differenc.pdf
What is the between facial action unit and facial landmark differenc.pdfWhat is the between facial action unit and facial landmark differenc.pdf
What is the between facial action unit and facial landmark differenc.pdf
arshin9
 
Significance of Discoveries in Genetics and DNA Our understandin.pdf
Significance of Discoveries in Genetics and DNA Our understandin.pdfSignificance of Discoveries in Genetics and DNA Our understandin.pdf
Significance of Discoveries in Genetics and DNA Our understandin.pdf
arshin9
 
2.(Sorted list array implementation)This sorted list ADT discussed .pdf
2.(Sorted list array implementation)This sorted list ADT discussed .pdf2.(Sorted list array implementation)This sorted list ADT discussed .pdf
2.(Sorted list array implementation)This sorted list ADT discussed .pdf
arshin9
 
Organ transplants recipients take medications to suppress their immu.pdf
Organ transplants recipients take medications to suppress their immu.pdfOrgan transplants recipients take medications to suppress their immu.pdf
Organ transplants recipients take medications to suppress their immu.pdf
arshin9
 
Need Bacteria Factor VIII Bio wiz please, last chance!! Incorrect. A.pdf
Need Bacteria Factor VIII Bio wiz please, last chance!! Incorrect. A.pdfNeed Bacteria Factor VIII Bio wiz please, last chance!! Incorrect. A.pdf
Need Bacteria Factor VIII Bio wiz please, last chance!! Incorrect. A.pdf
arshin9
 
Multiplexing Question.Describe (briefly) the technique of multiple.pdf
Multiplexing Question.Describe (briefly) the technique of multiple.pdfMultiplexing Question.Describe (briefly) the technique of multiple.pdf
Multiplexing Question.Describe (briefly) the technique of multiple.pdf
arshin9
 
need this program in java please and thanks!NOTICE There are NO s.pdf
need this program in java please and thanks!NOTICE There are NO s.pdfneed this program in java please and thanks!NOTICE There are NO s.pdf
need this program in java please and thanks!NOTICE There are NO s.pdf
arshin9
 
Introduction Programmers for a Better TomorrowProgrammers for a B.pdf
Introduction Programmers for a Better TomorrowProgrammers for a B.pdfIntroduction Programmers for a Better TomorrowProgrammers for a B.pdf
Introduction Programmers for a Better TomorrowProgrammers for a B.pdf
arshin9
 
1. Please answer all questions1) Todays managers should expect t.pdf
1. Please answer all questions1) Todays managers should expect t.pdf1. Please answer all questions1) Todays managers should expect t.pdf
1. Please answer all questions1) Todays managers should expect t.pdf
arshin9
 

More from arshin9 (20)

what is the HTTP protocol used for What are its major parts.pdf
what is the HTTP protocol used for What are its major parts.pdfwhat is the HTTP protocol used for What are its major parts.pdf
what is the HTTP protocol used for What are its major parts.pdf
 
What is the between facial action unit and facial landmark differenc.pdf
What is the between facial action unit and facial landmark differenc.pdfWhat is the between facial action unit and facial landmark differenc.pdf
What is the between facial action unit and facial landmark differenc.pdf
 
What are contemporary management challenges and opportunitiesSo.pdf
What are contemporary management challenges and opportunitiesSo.pdfWhat are contemporary management challenges and opportunitiesSo.pdf
What are contemporary management challenges and opportunitiesSo.pdf
 
Valinomycin is a potassium ionophore. What would be its effect on in.pdf
Valinomycin is a potassium ionophore. What would be its effect on in.pdfValinomycin is a potassium ionophore. What would be its effect on in.pdf
Valinomycin is a potassium ionophore. What would be its effect on in.pdf
 
The retrovirus genome is made of the nucleic acid before the virus be.pdf
The retrovirus genome is made of the nucleic acid before the virus be.pdfThe retrovirus genome is made of the nucleic acid before the virus be.pdf
The retrovirus genome is made of the nucleic acid before the virus be.pdf
 
the probability that it is raining is .25. the orbability that it is.pdf
the probability that it is raining is .25. the orbability that it is.pdfthe probability that it is raining is .25. the orbability that it is.pdf
the probability that it is raining is .25. the orbability that it is.pdf
 
2)In presentation software, you can use a(n) ____ to add movement to.pdf
2)In presentation software, you can use a(n) ____ to add movement to.pdf2)In presentation software, you can use a(n) ____ to add movement to.pdf
2)In presentation software, you can use a(n) ____ to add movement to.pdf
 
Significance of Discoveries in Genetics and DNA Our understandin.pdf
Significance of Discoveries in Genetics and DNA Our understandin.pdfSignificance of Discoveries in Genetics and DNA Our understandin.pdf
Significance of Discoveries in Genetics and DNA Our understandin.pdf
 
Scope is much less complicated if functions cannot contain other func.pdf
Scope is much less complicated if functions cannot contain other func.pdfScope is much less complicated if functions cannot contain other func.pdf
Scope is much less complicated if functions cannot contain other func.pdf
 
Refer to the drawings in Figure 13.2 of a single pair of homologous c.pdf
Refer to the drawings in Figure 13.2 of a single pair of homologous c.pdfRefer to the drawings in Figure 13.2 of a single pair of homologous c.pdf
Refer to the drawings in Figure 13.2 of a single pair of homologous c.pdf
 
Prions are viruses that cause proteins to misfold. Select one True.pdf
Prions are viruses that cause proteins to misfold.  Select one  True.pdfPrions are viruses that cause proteins to misfold.  Select one  True.pdf
Prions are viruses that cause proteins to misfold. Select one True.pdf
 
2.(Sorted list array implementation)This sorted list ADT discussed .pdf
2.(Sorted list array implementation)This sorted list ADT discussed .pdf2.(Sorted list array implementation)This sorted list ADT discussed .pdf
2.(Sorted list array implementation)This sorted list ADT discussed .pdf
 
Organ transplants recipients take medications to suppress their immu.pdf
Organ transplants recipients take medications to suppress their immu.pdfOrgan transplants recipients take medications to suppress their immu.pdf
Organ transplants recipients take medications to suppress their immu.pdf
 
Need Bacteria Factor VIII Bio wiz please, last chance!! Incorrect. A.pdf
Need Bacteria Factor VIII Bio wiz please, last chance!! Incorrect. A.pdfNeed Bacteria Factor VIII Bio wiz please, last chance!! Incorrect. A.pdf
Need Bacteria Factor VIII Bio wiz please, last chance!! Incorrect. A.pdf
 
Multiplexing Question.Describe (briefly) the technique of multiple.pdf
Multiplexing Question.Describe (briefly) the technique of multiple.pdfMultiplexing Question.Describe (briefly) the technique of multiple.pdf
Multiplexing Question.Describe (briefly) the technique of multiple.pdf
 
need this program in java please and thanks!NOTICE There are NO s.pdf
need this program in java please and thanks!NOTICE There are NO s.pdfneed this program in java please and thanks!NOTICE There are NO s.pdf
need this program in java please and thanks!NOTICE There are NO s.pdf
 
A researcher follows Great Horned Owls throughout Idaho. They collect.pdf
A researcher follows Great Horned Owls throughout Idaho. They collect.pdfA researcher follows Great Horned Owls throughout Idaho. They collect.pdf
A researcher follows Great Horned Owls throughout Idaho. They collect.pdf
 
Introduction Programmers for a Better TomorrowProgrammers for a B.pdf
Introduction Programmers for a Better TomorrowProgrammers for a B.pdfIntroduction Programmers for a Better TomorrowProgrammers for a B.pdf
Introduction Programmers for a Better TomorrowProgrammers for a B.pdf
 
Is there any way in which we can accept Hobbes view of human being.pdf
Is there any way in which we can accept Hobbes view of human being.pdfIs there any way in which we can accept Hobbes view of human being.pdf
Is there any way in which we can accept Hobbes view of human being.pdf
 
1. Please answer all questions1) Todays managers should expect t.pdf
1. Please answer all questions1) Todays managers should expect t.pdf1. Please answer all questions1) Todays managers should expect t.pdf
1. Please answer all questions1) Todays managers should expect t.pdf
 

Recently uploaded

SPLICE Working Group: Reusable Code Examples
SPLICE Working Group:Reusable Code ExamplesSPLICE Working Group:Reusable Code Examples
SPLICE Working Group: Reusable Code Examples
Peter Brusilovsky
 
SURVEY I created for uni project research
SURVEY I created for uni project researchSURVEY I created for uni project research
SURVEY I created for uni project research
CaitlinCummins3
 
會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽
會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽
會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽
中 央社
 
會考英文會考英文會考英文會考英文會考英文會考英文會考英文會考英文會考英文會考英文會考英文
會考英文會考英文會考英文會考英文會考英文會考英文會考英文會考英文會考英文會考英文會考英文會考英文會考英文會考英文會考英文會考英文會考英文會考英文會考英文會考英文會考英文會考英文
會考英文會考英文會考英文會考英文會考英文會考英文會考英文會考英文會考英文會考英文會考英文
中 央社
 
Personalisation of Education by AI and Big Data - Lourdes Guàrdia
Personalisation of Education by AI and Big Data - Lourdes GuàrdiaPersonalisation of Education by AI and Big Data - Lourdes Guàrdia
Personalisation of Education by AI and Big Data - Lourdes Guàrdia
EADTU
 

Recently uploaded (20)

SPLICE Working Group: Reusable Code Examples
SPLICE Working Group:Reusable Code ExamplesSPLICE Working Group:Reusable Code Examples
SPLICE Working Group: Reusable Code Examples
 
When Quality Assurance Meets Innovation in Higher Education - Report launch w...
When Quality Assurance Meets Innovation in Higher Education - Report launch w...When Quality Assurance Meets Innovation in Higher Education - Report launch w...
When Quality Assurance Meets Innovation in Higher Education - Report launch w...
 
SURVEY I created for uni project research
SURVEY I created for uni project researchSURVEY I created for uni project research
SURVEY I created for uni project research
 
會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽
會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽
會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽
 
UChicago CMSC 23320 - The Best Commit Messages of 2024
UChicago CMSC 23320 - The Best Commit Messages of 2024UChicago CMSC 23320 - The Best Commit Messages of 2024
UChicago CMSC 23320 - The Best Commit Messages of 2024
 
Trauma-Informed Leadership - Five Practical Principles
Trauma-Informed Leadership - Five Practical PrinciplesTrauma-Informed Leadership - Five Practical Principles
Trauma-Informed Leadership - Five Practical Principles
 
會考英文會考英文會考英文會考英文會考英文會考英文會考英文會考英文會考英文會考英文會考英文
會考英文會考英文會考英文會考英文會考英文會考英文會考英文會考英文會考英文會考英文會考英文會考英文會考英文會考英文會考英文會考英文會考英文會考英文會考英文會考英文會考英文會考英文
會考英文會考英文會考英文會考英文會考英文會考英文會考英文會考英文會考英文會考英文會考英文
 
TỔNG HỢP HƠN 100 ĐỀ THI THỬ TỐT NGHIỆP THPT TOÁN 2024 - TỪ CÁC TRƯỜNG, TRƯỜNG...
TỔNG HỢP HƠN 100 ĐỀ THI THỬ TỐT NGHIỆP THPT TOÁN 2024 - TỪ CÁC TRƯỜNG, TRƯỜNG...TỔNG HỢP HƠN 100 ĐỀ THI THỬ TỐT NGHIỆP THPT TOÁN 2024 - TỪ CÁC TRƯỜNG, TRƯỜNG...
TỔNG HỢP HƠN 100 ĐỀ THI THỬ TỐT NGHIỆP THPT TOÁN 2024 - TỪ CÁC TRƯỜNG, TRƯỜNG...
 
An Overview of the Odoo 17 Knowledge App
An Overview of the Odoo 17 Knowledge AppAn Overview of the Odoo 17 Knowledge App
An Overview of the Odoo 17 Knowledge App
 
Stl Algorithms in C++ jjjjjjjjjjjjjjjjjj
Stl Algorithms in C++ jjjjjjjjjjjjjjjjjjStl Algorithms in C++ jjjjjjjjjjjjjjjjjj
Stl Algorithms in C++ jjjjjjjjjjjjjjjjjj
 
Including Mental Health Support in Project Delivery, 14 May.pdf
Including Mental Health Support in Project Delivery, 14 May.pdfIncluding Mental Health Support in Project Delivery, 14 May.pdf
Including Mental Health Support in Project Delivery, 14 May.pdf
 
Major project report on Tata Motors and its marketing strategies
Major project report on Tata Motors and its marketing strategiesMajor project report on Tata Motors and its marketing strategies
Major project report on Tata Motors and its marketing strategies
 
MOOD STABLIZERS DRUGS.pptx
MOOD     STABLIZERS           DRUGS.pptxMOOD     STABLIZERS           DRUGS.pptx
MOOD STABLIZERS DRUGS.pptx
 
Book Review of Run For Your Life Powerpoint
Book Review of Run For Your Life PowerpointBook Review of Run For Your Life Powerpoint
Book Review of Run For Your Life Powerpoint
 
Supporting Newcomer Multilingual Learners
Supporting Newcomer  Multilingual LearnersSupporting Newcomer  Multilingual Learners
Supporting Newcomer Multilingual Learners
 
OS-operating systems- ch05 (CPU Scheduling) ...
OS-operating systems- ch05 (CPU Scheduling) ...OS-operating systems- ch05 (CPU Scheduling) ...
OS-operating systems- ch05 (CPU Scheduling) ...
 
ANTI PARKISON DRUGS.pptx
ANTI         PARKISON          DRUGS.pptxANTI         PARKISON          DRUGS.pptx
ANTI PARKISON DRUGS.pptx
 
ESSENTIAL of (CS/IT/IS) class 07 (Networks)
ESSENTIAL of (CS/IT/IS) class 07 (Networks)ESSENTIAL of (CS/IT/IS) class 07 (Networks)
ESSENTIAL of (CS/IT/IS) class 07 (Networks)
 
diagnosting testing bsc 2nd sem.pptx....
diagnosting testing bsc 2nd sem.pptx....diagnosting testing bsc 2nd sem.pptx....
diagnosting testing bsc 2nd sem.pptx....
 
Personalisation of Education by AI and Big Data - Lourdes Guàrdia
Personalisation of Education by AI and Big Data - Lourdes GuàrdiaPersonalisation of Education by AI and Big Data - Lourdes Guàrdia
Personalisation of Education by AI and Big Data - Lourdes Guàrdia
 

Which of the following is true about indexes and index design a. in.pdf

  • 1. Which of the following is true about indexes and index design? a. indexes usually speed up write operations b. a composite index is an index on a single column c. indexes should be created on columns used by WHERE and BY clauses d. an index is created for every foreign key by default Solution Answer: Indexes should be created on columns used by WHERE and BY clauses. Indexes are used for retrieve the records fast. So we have to mention the column names in WHERE clause and By clause in which we created the columns for fast retrieval of the records.