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Explain different categories of failures that occur in Oracle database?
Categories of Failures - In Oracle database subsequent types of failures can occurred: Statement Failure• Bad data type• Insufficient space Insufficient Privileges (e.g., object privileges to a role) User Process Failure• User performed an abnormal disconnect• User's session was abnormally terminated• User's program raised an address exception User Error• User drops a table• User damages data by modification Instance Failure Media Failure• User drops a table• User damages data by modification Alert Logs• Records informational and error messages• All Instance startups and shutdowns are recorded in the log
Illustrate about the advanced object design Advanced object design is a complex task. The objects discovered through analysis serve as a skeleton of design. The operations reco
Create Student DB and execute Insert query? STUDENT (name, student#, class, major) COURSE (course name, course#, credit hours, department) SECTION (section identifier, course
Explain retrieval in QBE? Retrieval in QBE : A "GUI" for expressing queries. Based on the Domain Relational Calculus (DRC) Actually invented before GUIs. Very co
Ask questApollo Hospitals (AH) is a popular medical service provider in Oman. AH wants to automate its business functions into an information system. The proposed information syst
What is self-transition? If there is a transition which goes back to same state, it is known as "self- transition." With a trigger action exit action would be executed f
Define DBMS? DBMS: database management system (DBMS) is computer software designed for the reason of supervision databases based on a variety of data models.
Increases efficiency : Data is stored close to most often used site, therefore retrieval would be faster. Also, data that is not required by local applications is not stored, there
draw er diagram using entities crop,employee,department,plot,cultivation plan,machinery,seed,fertilizer
Mappings between Levels and Data Independence The 3 levels of abstraction in the database do not exist separately of each other. There must be some correspondence, or mapping
What is key ? Key - A single attribute or a combination of two or more attributes of an entity set which is used to recognize one or more instances (rows) of the set (table) is
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