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What are the ways in which the variable-length records arise in database systems? Storage of many record types in a file. Record types that permit variable lengths for one o
Write short notes on relational model The relational model uses a collection of tables to show both data and the relationships between those data. The relational mo
4. Describe three ways to handle missing field values
Competition entrants can be either Individuals, or Teams. A Team is usually sponsored by a business, and, in that case, the team members would all wear T-shirts with the sponsoring
FDs in Entities : Student entity : Enrolment number → Student name, Address Course Entity :
How to design a formal and exact model How to design a formal and exact model of real-world problems by applying findings of analysis phase of OMT. The object design phase find
Explain the Aggregation implies concurrency Concurrency actually is: This in objects can be identified by the way they change state. Present objects can change state independen
What is a data dictionary? Data Dictionary is a main source of data in a data management system. Its major function is to carry the creation and management of data definition
Define Fifth Normal form is concerned with Ans : Fifth Normal form is concerned with Join dependency.
intent locking
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