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$30-250 USD

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Publicado hace más de 8 años

$30-250 USD

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1. Draw a B+tree with p=3 and pleaf=2. (Insertion Sequence: 8, 5, 1, 7, 3, 12, 9, 6) and test your result with [login to view URL]~galles/visualization/BPlusTree.html. If the simulator shows a different result than yours, please explain why they are different. (10 points) 2. Explain why it is not always possible to perform SQL UPDATE/DELETE/INSERT statements on top of a view. (10 points) 3. Suppose B(R) = 5,000, r(R) = 250,000, B(S) = 1,000, r(S) = 4,000 with a buffer nB = 1,200. • What is the expected cost of performing a nested loop join between R and S? Please calculate the lowest cost. (5 points) • Calculate the cost of performing a hash join between R and S. (5 points) 4. For each of the following transaction schedules, draw the conflict graph and decide if the schedule is conflict serializable or not. If the schedule is conflict serializable, write an equivalent serial schedule. If the schedule is not conflict serializable, explain why not. • r1(x);r2(x);w2(x);r3(y);r2(y);w3(y);w2(y);w1(x); (5 points) • r1(x);r2(x);r3(y);w1(x);r2(z);r2(y);w2(y);w1(z); (5 points) 5. To guarantee conflict serializable execution of transactions, locks can be introduced. The operation Li(x) means the transaction i should perform a lock on the resource x before reading or writing it, then perform an unlock operation Ui(x) when it is done. However, this rule is not sufficient to guarantee a serializable schedule and then, basic two-phase locking protocol is needed instead. Prove that the basic two-phase locking protocol guarantees conflict serializability of schedules. (Hint: Show that, if a serializability graph for a schedule has a cycle, then at least one of the transactions participating in the schedule does not obey the two-phase locking protocol.) (10 points)
ID del proyecto: 8917653

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9 propuestas
Proyecto remoto
Activo hace 8 años

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9 freelancers están ofertando un promedio de $155 USD por este trabajo
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Hello, I have been working with a MNC based company since last ~ 5 years, as an IT BI DWH Professional. The project is a BI DWH project which covers 3 layers of BI (ETL, Data warehouse & Reporting) and helped me in nourishing my talent in all the technologies around these 3 layers. Below are some key areas of my skills: • Expert in SQL Server, Oracle and MS Access Databases • Expert in BO XI, Cognos and SQL Server Reporting Service (SSRS) • Expert in & designing & Implementation of end to end ETL Process using Informatica & SSIS Tools • Expert in Designing Qlikview Dashboard BI Solution • Expert in ER & Dimension Data modeling • Complete Command on PL/SQL concept e.g. Procedures, Functions, packages and complex queries. • Basic knowledge of Unix Shell scripting • Web Development using Java, CSS, and HTML ,PHP & Java Script • Expert in excel Macro • Expert in C & C ++ Programming I have experience in all the above areas and during my project work I have completed all of the above tasks. As a Freelancer also I have worked in few of the above areas where I got a chance and delivered the best. I had conducted Informatica & DWH training for a US based training organization from Nov’14 to Dec’14. We recently started our own company “Point5Nyble Your Needs, Our Dream”. We always work to provide Best Delivery with 100 % customer satisfaction Would be looking forward to work on this opportunity and will ensure to deliver best. Regards, Point5Nyble
$200 USD en 3 días
4,9 (14 comentarios)
3,9
3,9
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Hi, I have been working as Database Analyst Programmer more than 10 years. I became OCP, CCNP, RHCE 3 years back. Earlier I completed B.Sc. Enng and M.Sc. Engg both in computer engineering. Check my works here https://www.freelancer.com/projects/Software-Architecture-Engineering/Entity-Relationship-Diagram-ERD.html https://www.freelancer.com/projects/PHP-HTML.1/Database-Project.html https://www.freelancer.com/projects/database-administration/Database-Coursework.html I'm assuring you that you will score more than 90% I'm looking forward to hearing from you very soon
$155 USD en 3 días
3,8 (16 comentarios)
4,6
4,6
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We are expert in Java and J2EE technologies and have completed numerous projects and assignments. Our skills and some of our completed projects can be seen on our profile page https://www.freelancer.com/u/Javagurupk.html. I have MS-IT degree with specialization in databases. I have already done such assignments during my MS with Advanced Database courses. Let us to complete this project for you.
$90 USD en 2 días
5,0 (1 comentario)
2,7
2,7
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A proposal has not yet been provided
$100 USD en 2 días
5,0 (2 comentarios)
1,8
1,8
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Hello Sir, Being a Software Engineer i can do your job easily, i have 3 years experience with desktop application development with database, come to chat for detail conversation about your project. Regards Sibghat Ullah
$222 USD en 3 días
0,0 (0 comentarios)
0,0
0,0
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$100 USD en 3 días
0,0 (0 comentarios)
0,0
0,0
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Hi I am Hema, having 10 years experience in software development. Worked on various database projects on Oracle and SQL Server. I am passionate working on database programming. Please revert if you need anything from me. Looking forward to hear from you.
$222 USD en 3 días
0,0 (0 comentarios)
0,0
0,0
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I'm new in this website but i have working experience in database of 1 year plus and i have worked in multiple project that are core related to database and Business intelligence
$155 USD en 3 días
0,0 (0 comentarios)
0,0
0,0

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Bandera de UNITED STATES
Fullerton, United States
4,8
1
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Miembro desde ago 23, 2015

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