SQL INTRODUCTION Diaz‚ Francis Lorenzo A. BSM CS 3B G2 History of SQL SQL began life as SEQUEL11‚ the Structured English Query Language‚ a component of an IBM research project called System/R. System/R was a prototype of the first relational database system; it was created at IBM’s San Jose laboratories by Donald D. Chamberlin and Raymond F. Boyce in 1974‚ and SEQUEL was the first query language to support multiple tables and multiple users. In the late 1970s‚ SQL made its first appearance in
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Lesson 1 What is a database: A database is a group of data that has been organised in a table or group. This makes it easy to find data‚ but also allows you to not have any duplicates in a group. A database is used in a school or college to store students date of births. This allows the school to be able to see how old the students are. The database can also be password protected to keep the data safe. What is a flat file database: A flat database is where you have all your data in one table.
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Distributed Database Management Systems Rajat sharan errajatsharan@gmail.com Abstract: The dream of computing power as readily available as the electricity in a wall socket is coming closer to reality with the arrival of grid and cloud computing. At the same time‚ databases grow to sizes beyond what can be efficiently managed by single server systems. There is a need for efficient distributed database management systems (DBMSs). Current distributed DBMSs are not built to scale to more
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I. Column Oriented Database A column-oriented DBMS is a database management system (DBMS) that stores data tables as sections of columns of data rather than as rows of data. In comparison‚ most relational DBMSs store data in rows. This column-oriented DBMS has advantages for data warehouses‚ customer relationship management (CRM) systems‚ and library card catalogs‚ and other ad hoc inquiry systems where aggregates are computed over large numbers of similar data items. It is possible to achieve
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Questions Indicate whether the following statements are true or false on the student answer sheet. 1) A requirement is something a database needs to do in order to fulfill its purpose. True 2) You only need to include the most important stakeholders in the database discussions. False 3) Forms are used for gathering input. True 4) A transaction database is optimized to track transactions in real time. True 5) Data mining uses business intelligence tools and techniques on
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Database Development Process 1. Define business processes Many database development efforts begin by defining the key business and/or operational processes within the organization Developers first create high-level models showing the major activity steps associated with marketing‚ sales‚ production‚ human resource management‚ public relations‚ research and development‚ and so on Taken together‚ these process maps represent an enterprise-wide model of the organization and its core 2. Determine
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Comparing and Contrasting the Relational Database Model and OO Model The relational database model is based upon tables or relations. In this model‚ the physical implementation of the database is abstracted away from the user. Users query the database using a high-level query language‚ such as SQL. The relations are made up of columns‚ which have headings indicating the attribute represented by that column. Tables have key fields‚ which can be used to identify unique records. Keys relate tables
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1 Database Design and Implementation Candidate Name: Course Name: Date of Submission: Authorization: MAY MYAT SWE Database Design and Implementation 7‚ April 2012 University of Greenwich June 2012 KMD Yangon Center MAY MYAT SWE 2 Database Design and Implementation Table of Contents No Description Page Assumption ........................................................................................ 3 1. 2. 3. 4. 5. 6. Conceptual Data Model ........................
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Silberschatz−Korth−Sudarshan • Database System Concepts‚ Fourth Edition Front Matter 1 1 11 11 35 35 36 87 140 140 141 194 229 260 307 307 308 337 363 393 393 394 446 494 529 563 563 564 590 637 Preface 1. Introduction Text I. Data Models Introduction 2. Entity−Relationship Model 3. Relational Model II. Relational Databases Introduction 4. SQL 5. Other Relational Languages 6. Integrity and Security 7. Relational−Database Design III. Object−Based Databases and XML Introduction 8. Object−Oriented
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Beauty is in the soul A beautiful heart is better than a beautiful face. The phrase you hear all the time while you’re growing up‚ especially if you’re a girl. Audrey Hepburn said “The beauty of a woman is not in a facial mole‚ but true beauty in a Woman is reflected in her soul.” That is the theme I see in both “Snow White and the Seven Dwarfs” and “Cinderella”. In both poems the person that had a beautiful heart always prevailed. These two poems and this theme basically reiterate what people
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