Concurrency Control in Database Systems Key Points The purpose of concurrency control is to ensure that one user’s work does not inappropriately influence another user’s work. In some cases‚ these measures ensure that a user gets the same result when processing with other users as that person would have received if processing alone. In other cases‚ it means that the user’s work is influenced by other users but in an anticipated way. When many transactions take place at the same time‚ they are
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THESIS TITLE : Computerized Library System with Barcode Technology for St. Mary of the Woods School | DATE OF DEFENSEDATE: | SCHOOL CAMPUS: STI College Global City | NAME OF I.T ADVISER: Mr. Edimar N. Manulat | SGNATURE: | NAME OF G.E ADVISER: Ms. Adriene Victoria M. Zaballero | SIGNATURE: | Each member of the group indicates the chapter(s) he/she has written in the documentation‚ module(s)‚ he/she had developed in the software and the topic(s)/sub topic(s) that he/she will be discussing
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C h a p t e r 15 Object-Oriented Database Development L E A R N I N G O B J E C T I V E S After studying this chapter‚ you should be able to: ● Concisely define each of the following key terms: atomic literal‚ collection literal‚ set‚ bag‚ list‚ array‚ dictionary‚ structured literal‚ and extent. ● Create logical object-oriented database schemas using the object definition language (ODL). ● Transform conceptual UML class diagrams to logical ODL schemas by mapping classes (abstract and concrete)
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EXPERIMENT NO 2 FACT TABLE FOR UNIVERSITY DATABASE AIM:-Creation of dimension table and fact table for University Database. THEORY:- DIMENSION TABLE In data warehousing‚ a dimension table is one of the set of companion tables to a fact table. The fact table contains business facts or measures and foreign keys which refer to candidate keys (normally primary keys) in the dimension tables. Contrary to fact tables‚ the dimension tables contain descriptive attributes (or fields) which are typically
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Week 3 Determining Databases and Data CommunicationsBIS 320 Week 3 Determining Databases and Data CommunicationsScenario 1: If I were a marketing assistant for a consumer electronic company and I had to set-up my company’s booth at the tradeshow. I would be need to be extremely detailed in packing up equipment and components. The cost of this technology is extremely expensive and it is my responsibility and my job on the line. When technology companies do tradeshows there are a wide variety of equipment
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EE4791 Database Systems Guidelines* for Tutorial 1 * Disclaimer: These are guidelines‚ rather than the actual solutions. 1. For each of the following pairs of entities indicate whether (under typical university circumstances) there is a one-to-many or a many-to-many relationship. Then using the shorthand notation introduced in the lecture‚ draw a diagram for each of the relationships. a. STUDENT and COURSE (students register for courses) Many-to-many (M:N) STUDENT COURSE b. BOOK
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Relational Database Management System Oracle provides a flexible RDBMS called Oracle7. Using its features‚ you can store and manage data with all the advantages of a relational structure plus PL/SQL‚ an engine that provides you with the ability to store and execute program units. The server offers the options of retrieving data based on optimization techniques. It includes security features that control how a database is accessed and used. Other features include consistency and protection of data
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Sometimes we have to save image‚ any type of multimedia file or text file in Oracle database from client. In web application client must upload the file in web server or any other machine. But web server can access that directory where the files are uploaded. To complete the operation we can use Oracle Blob data type‚ Oracle directory and with a procedure. Implementation: Suppose we have a table name ImageTable. The table should be like this. CREATE TABLE ImageTable ( ID NUMBER‚ FILENAME
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Determining Databases and Data Communications Kevin Dinkel BIS320 6/16/2014 Cynthia Pryke Determining Databases and Data Communications Being placed in scenarios gets you out of the student mindset and puts you in a unique decision making state of mind. I enjoy these exercises to ensure there is an understanding of what it takes to get into that state of mind. Scenario 1 Tracking data about booth components‚ equipment‚ shippers‚ and shipments are extremely important part of my job. Understanding
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------------------------------------------------- GeRard ryan relational database assignment ------------------------------------------------- GeRard ryan relational database assignment T T N N E E R R U U Contents Introduction - 2 - Description of Assignment - 2 - Problems & Solutions - 4 - Normalisation - 5 - Data dictionary - 0 - Relationships between each Table - 5 - Database Tables - 6 - Introduction Description of Assignment The company I have decided
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