1. The user executes a SQL statement and commits the transaction. For example‚ the user changes a name in a row of a table. 1. The server process receives the statement and checks the shared pool for any shared SQL area that contains an identical SQL statement. If a shared SQL area is found‚ the server process checks the user’s access privileges to the requested data and the previously existing shared SQL area is used to process the statement; if not‚ a new shared SQL area is allocated for the
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NATIONAL OPEN UNIVERSITY OF NIGERIA COURSE CODE :MBA 758 COURSE TITLE: DATABASE MANAGEMENT SYSTEM COURSE GUIDE MBA 758 DATABASE MANAGEMENT SYSTEM Course Writer Gerald C. Okereke Eco Communications Inc. Lagos Ikeja Mr. E. Eseyin National Open University of Nigeria Dr. O. J. Onwe National Open University of Nigeria Bimbola‚ E.U. Adegbola National Open University of Nigeria Course Editor Programme Leader Course Coordinator NATIONAL OPEN UNIVERSITY OF NIGERIA National Open University
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to perform complex queries designed to transform the raw data into useful information. ___F 3. SQL is considered hard to learn; its command set has a vocabulary of more than 300 words. ___F_ 4. All SQL commands must be issued on a single line. ___T_ 5. To restore the values of a table‚ provided you have not used the COMMIT command‚ you must use the ROLLBACK command. ___T_ 6. SQL allows the use
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Chapter 6 1. Which of the following is a purpose of the SQL standard? A) To specify syntax and semantics of SQL data definition and manipulation B) To specify minimal and complete standards‚ which permit different degrees of adoption in products C) To define the data structures and basic operations for SQL databases D) All of the above Answer: D Level: Moderate Page Ref: 312 Topic: The Role of SQL in a Database Architecture AACSB Use of Information Technology 2. The benefits of
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control commands. 3. (4 points) Describe the components and structure of a typical SQL environment. 4. (6 points‚ 2 points ea) Drawing on material covered in prior chapters‚ explain the factors to be considered in deciding whether to create a key index for a table in SQL. (Hint: there are three.) 5. (6 points‚ 3 points ea) a. What is the difference between COUNT‚ COUNT DISTINCT‚ and COUNT(*) in SQL? b. When will these three commands generate the same and different results? 6. (4
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VALLIAMMAI ENGINEERING COLLEGE III SEMESTER - B.E – COMPUTER SCIENCE AND ENGINEERING QUESTION BANK - CS6302 DATABASE MANAGEMENT SYSTEMS UNIT I 1. What are the disadvantages of file processing system? 2. Explain the basic structure of a relational database with an example. 3. What do you mean by weak entity set? 4. Give example for one to one and one to many relationships. 5. What is the need of normalization? 6. Write a note on functional dependencies. 7. Who is a DBA? What are the responsibilities
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The history began between Relational Databases and SQL. In 1970‚ Edgar F. Codd wrote the now-famous paper on relational data modeling: "A Relational Model of Data for Large Shared Data Banks." The original relational database language‚ developed by IBM‚ was called SEQUEL (Structured English Query Language) to support its prototype RDBMS (Relational Database Management System) called System/R. The name later was changed from SEQUEL to Structured Query Language. In the beginning Codd started out a
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The Internet‚ or better yet‚ the technologies used in the operation of the Internet‚ are tied into the design of the JDBC. The other dominant design basis for the JDBC is the database standard known as SQL. Hence‚ the JDBC is a fusion of three discrete computer areas: Java‚ Internet technology‚ and SQL. With the growing implementation of these Internet technologies in “closed” networks‚ called intranets‚ the time was right for the development of Java-based enterprise APIs. In this book‚ intranet and
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Java Database Connectivity (JDBC) is a Java-based data access technology that defines how a client may access a database. It provides methods for querying and updating data in a database. The JDBC classes are contained in the Java package java.sql and javax.sql. In this JDBC Oracle connectivity example we will see how to setup a JDBC development environment and create a simple Java database application to connect to Oracle Database Express Edition using JDBC API. We will also see the following important
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should be able to: 1. Explain the principles of database management systems 2. Explain data modeling with emphasis on Relational Mode 3. Demonstrate the ability to design databases using E-R Models 4. Explain query processing and familiarize using SQL; 5. Strategic information system planning: what is involved in establishing a planning process 6. Determining the business information systems strategy. 7. Strategic planning for information systems 8. Explain the basic steps in Project Management This
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