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Object-based Models: Use objects as key data representation components.
Examples:-
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 the most significant feature that does not directly map into programming language structures? Why? Association, since there are complex types of association, like as qu
triggering
anyone have a textbook solutions case fair, 8 edition of vol 1 ?, please give me
What is Conceptual Schema? Conceptual Schema - Conceptual schema elaborates the structure of the overall database for a community of users. It hides the details of physical sto
Explain Instance and schemas? Instances and schemas: Databases changes over time as the information is deleted and inserted. The collection of information stored in database
(1) Insert into PERSON Violated constraint: - Key constraint Reason: - Primary key 1 already exists in PERSON. Dealing: - DBMS could ask the user to provide valid PER
Introduction In large projects, we can have many different companies working together. Generally, the project or contract is awarded to one company (Principal Contractor), which
explain three types of internet risks to the consummers whent he business system is data dependent. how can we minimise these risks
lock and types of lock
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