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Explain Hierarchical Model ? Hierarchical Model - It was established to model several kinds of hierarchical organizations which exist in the real world. It uses tree structur
What is the full form of DDL? DDL is stand for Data Definition Language.
Describe relational model? Structure of relational data base Basic structure Database schema Keys Schema diagram Query languages
a. Construct a query around any one of the functional divisions you made in 4a such that if executed in the distributed design of 4 would require reconstruction of at least two ho
What is meant by log-based recovery? The most widely used structures for recording database changes is the log. The log is a sequence of log records, recording all the update a
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
In E-R Diagram how derived attribute are represented ? In E-R Diagram By Dashed ellipse derived attribute are represented.
recovey techniques based on deferred update and immediate update
WHAT IS DATABASE TECHNOLOGIES
Homework chapter 10 no 3
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