(on the disk)‚ but not necessarily physically contiguous (the blocks could be dispersed). Blocks in a file are either physically contiguous or not‚ but the following is generally simple to do (for the file system): »Find the first block »Find the last block »Find the next block »Find the previous block Records are stored in blocks » This gives the mapping between a “logical” file and a “physical” file Assumptions (some to simplify presentation for now) »Fixed size records »No record spans
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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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2. TECHNOLOGIES USED 2.1 INTRODUCTION TO JAVA Initially the language was called as “oak” but it was renamed as “Java” in 1995. The primary motivation of this language was the need for a platform-independent (i.e.‚ architecture neutral) language that could be used to create software to be embedded in various consumer electronic devices. Java is a programmer’s language. Java is cohesive and consistent. Except for those constraints imposed by the Internet environment‚ Java gives the
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SLAVE TRADE DATABASE Assignment QUESTIONS/QUERIES In 1732‚ the slave ship Diligent under Captain Pierre Mary purchased slaves from ______Blight of Benin_______ and transported them to _____Martinique________. In 1655‚ the slave ship‚ Witte Paard‚ arrived in New York with ___391_______ slaves. From 1607 to 1650‚ how many voyages listed the principle region of slave landing in Mainland North America? ____1_____ In what year did it arrive with slaves? _1628________ What was the name of the vessel
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does the Oracle database have? Correct 2. Which of the following components comprise an oracle architecture? Correct 3. A _______________ is used to logically group data together Correct 4. Oracle automatically creates the SYSTEM tablespace Correct 5. A _____________ is a set of tables physically stored together as one table that shares a common column Correct 6. What is the use of an index? Correct 7. Which is the smallest unit of storage in an Oracle database? Correct 8
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donated their time to create a dozen Web sites and database applications for local charities. The APNC has a service program in which volunteers canvas the entire neighborhood every spring. They survey residents on numerous community health and well-being measures and then work to connect people with available services. The APNC needed a way to collect these surveys while out in the neighborhood and then synchronize the data back to the SQL Server database. This type of scenario occurs at many businesses
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The construction of Object-Oriented Database Management Systems started in the middle 80 ’s‚ at a prototype building level‚ and at the beginning of the 90 ’s the first commercial systems appeared. The interest for the development of such systems stems from the need to cover the modeling deficiencies of their predecessors‚ that is the relational database management systems. They were intended to be used by applications that have to handle big and complex data such as Computer Aided Engineering‚ Computer
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What impact does using databases have on young people’s lives? | Databases once were only used by the most advanced computer programmers‚ they have now come to be a part of our everyday lives. We use a number of databases every day without even realising‚ as they’re utilised in many of our technology devices nowadays. They are used in our television ‘boxes’ like the Sky +‚ Virgin media etc. different channels are listed in a database called ‘guide’‚ here you can look up what programmes are on which
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First Fleet Convict Database Answer the following questions! 1. Check to see if any convicts with your surname were transported on the first fleet. A - None of my family was. 2. What did Joshua Taylor steal that saw him sentenced to transportation? A - for stealing a handkerchief. 3. How old was Elizabeth Beckford when she was transported? A – 70 4. What was unusual about John McIntire? A – That he was allowed to carry a gun. 5. What was Martha Kennedy do for a living before being transported
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record (pg. 660) 2. Data redundancy is when the same data are stored unnecessarily at different places. Spreadsheets /islands of information lead up to the date redundancy. (pg. 16) 3. Data independence is when it is possible to make changes in the data storage characteristics without affecting the application program’s ability to access the data. It standalone data so it doesn’t need to be link with anything. (pg. 15) 4. DBMS is a collection of programs that manages the database structure and
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