subqueries and joins‚ Selected Answer: a join can sometimes be used as an alternative to a subquery‚ and a subquery can sometimes be used as an alternative to a join. Question 3 5 of 5 points When making an SQL query‚ we are using SQL as a(n) ________. Selected Answer: DML Question 4 0 of 5 points Every subquery can be alternatively expressed by a join. Selected Answer: False Question 5 5 of 5 points The clause SELECT COUNT
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Concurrency Control in Distributed Database Systems PHILIP A. BERNSTEIN AND NATHAN GOODMAN Computer Corporation of America‚ Cambridge‚ Massachusetts 02139 In this paper we survey‚ consolidate‚ and present the state of the art in distributed database concurrency control. The heart of our analysts is a decomposition of the concurrency control problem into two major subproblems: read-write and write-write synchronization. We describe a series of synchromzation techniques for solving each subproblem
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Designing Databases: Building a Conceptual Data Model [1] Fundamentals of Databases Alvaro A A Fernandes School of Computer Science University of Manchester Acknowledgements 2 These slides are minor adaptaAons of material authored and made available to instructors by Ramez Elmasri
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DATABASE A database is a collection of data organized to meet users’ needs. Why This Matters Without data and the ability to process it‚ an organization would not be able to successfully engage in business activities‚ nor would it be able to generate reports to support knowledgeable workers and decision makers which in turn help’s to achieve organizational goals; it would not be able to pay employees‚ send out bills‚ and order new inventory. Databases have made it possible to map the structure
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LP1_William_Norris Chapter 1 Practice question # 10 a) Advantages of a database over the instructor’s current system would be; organization of data into one location rather than across several spreadsheets‚ and ease and speed regarding both data storage and retrieval. b) Major topics of the database include; students‚ dates attended‚ assignment and test scores‚ and overall grades. c) A statement of work for this database may look like the following; History: Historically‚ student data has
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Database concepts | Assignment 1 | | Robyn Wright | 3/27/2013 | | Contents Introduction 2 Task 1 3 1.1 Definition of database management system 3 1.2 5 Advantages of database management system 3 1.3 3 Business functions database management system could do 3 1.4 5 database management system packages 3 1.5 10 Factors when choosing a database management system 3 Task 2 5 2.1 Create a database if it does not yet exist 5 2.2 Show if the database has been
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then in every branch problem were arise because of increasing of paper works and the communication between offices is poor. Erika Dela Cruz feels if she didn’t do anything to prevent the problem‚ too mistake were being made so she decided to take a database application to help solve the problem. FurniPointe is specialized in property management‚ by taking intermediate role between owners who wish to rent out their furnished property and clients who wanted the furnished property for a fixed period
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ways in which database technologies could be used by an office stationery supply company to achieve low-cost leadership. Answer: Sales databases could be used to make the supply chain more efficient and minimize warehousing and transportation costs. You can also use sales databases‚ as well as text mining and sentiment analysis‚ to determine what supplies are in demand by which customers and whether needs are different in different geographical areas. Business intelligence databases could be used
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Database management Homework 1 Chapter 1. Getting started A. Create a simple list of owners and properties. B. Describe modification problems. There are three problems. First is deletion problem‚ second is update problem‚ third is insertion problem. Deletion problem is when you want to delete data‚ you may lost too much data. Update problem is when you want to update data‚ the sheet may have inconsistent data. Last insertion problem is when you want to insert some data‚ you must
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an introduction to database architecture and relational databases. The introduction covers the basic concepts of database design and management‚ focusing on the steps that a database designer should follow when creating a database for use with an application‚ addressing the basic tasks encountered by a database administrator‚ and identifying and discussing some of the aspects of ongoing database management. In Week One‚ you are introduced to a variety of different database architecture types
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