important elements of a computer based information system is the database. A database is a collection of records or information that is stored in a computer in a structured manner so that information can be stored‚ managed‚ and retrieved. Databases are very useful for manipulating large amounts of data and producing reports and documents. This paper takes a look at the Oracle database system and its usage within my organization. The main objective of a database is to help an organization accomplish
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The entity-relationship model (or ER model) is a way of graphically representing the logical relationships of entities (or objects) in order to create a database. entity type is a collection of entity instances sharing similar properties Strong Entity Vs Weak Entity An entity set that does not have sufficient attributes to form a primary key is termed as a weak entity set. An entity set that has a primary key is termed as strong entity set. A weak entity is existence dependent. That is the
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What problem would you encounter if you wanted to produce a listing by city? How would you solve this problem by altering the file structure? Some of the project managers are mentioned several times‚ that would cause duplication in the city database. 3. If you wanted to produce a listing of the file contents by last name‚ area code‚ city‚ state‚ or zip code‚ how would you alter the file structure? Divide address capabilities‚ by dividing MANAGER_ADDRESS into its component parts (MGR_STREET
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source of information. Searching in databases and on the internet can be enhanced by the use of Boolean operators. Even if most people are capable of using the internet without knowledge of Boolean operators‚ this essay brings out their usefulness. This essay therefore attempts to support the assertion that Boolean operators are key in searching for information in databases as well as the internet. Working definitions given in this paper are Boolean operators‚ information search‚ database and the internet
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Development Company"‚"Charles"‚"Nowak"‚"616-988-0777"‚"144 E Tower Ave"‚"Grand Rapids"‚"MI"‚"49503"‚"cnowak45@rvdc3.com" "11042"‚‚"Michael"‚"Ingram"‚"269-337-9208"‚"10 Lincoln Dr"‚"Kalamazoo"‚"MI"‚"49007"‚"mingram8@milocal123.com" "11043"‚"Monroe State College"‚"Rachel"‚"Kirk"‚"616-988-1320"‚"40 Monroe St"‚"Grand Rapids"‚"MI"‚"49503"‚"rkirk9@msc25.edu" "11045"‚"Kalamazoo Neighborhood Development"‚"James"‚"Blackhawk"‚"269-343-7509"‚"3047 Millbrook Ave"‚"Kalamazoo"‚"MI"‚"49007"‚"jblackhawk7@knd89.gov" "11048"
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Oracle Table Triggers Version 11.1 General Data Dictionary Views Related To DDL Triggers trigger$ dba_triggers all_triggers user_triggers System Privileges Related To Table Triggers create trigger create any trigger administer database trigger alter any trigger drop any trigger Table Trigger Firing Options -- before constraints are applied BEFORE INSERT BEFORE UPDATE BEFORE DELETE -- after constraints are applied AFTER INSERT AFTER UPDATE AFTER DELETE Transaction
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DATABASE One of the technology terms that most people have become accustomed to hearing either at work or while surfing the Internet is the database. The database used to be an extremely technical term‚ however with the rise of computer systems and information technology throughout our culture‚ the database has become a household term. A database is a structured collection of records or data that is stored in a computer system. In order for a database to be truly functional‚ it must not only store
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Element to modify and insert records into you databases 4. Reports: It contains raw data and allows the organization of information in an easy way. 5. Databases: collection of associated information 6. Relational databases: access databases in which more than one can share information. 7. Record: each row in a table. 8. Data Value: an item such as data‚ or such as a single phone number. 9. Primary Key Field: a field that contains unique information for each record. 10. Quick Access Toolbar:
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Running Head: Database Development Case Study: Database Development Maintenance plans and activities that could be performed in order to improve data quality In order to improve the quality of datasets various activities to be performed like error detection and correlation‚ process design and process control and improvement In error detection method‚ errors are detected by comparing data to a correct baseline and by checking for missing values. By examining time stamp incorrected
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Lecture-13 Structured Query Language (SQL) Introduction Commercial database systems use more user friendly language to specify the queries. SQL is the most influential commercially marketed product language. Other commercially used languages are QBE‚ Quel‚ and Datalog. Basic Structure The basic structure of an SQL consists of three clauses: select‚ from and where. select: it corresponds to the projection operation of relational algebra. Used to list the attributes desired in the
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