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Objectives
After reading this unit you should be able to:
What is known as clustering file organization? In the clustering file organization, records of several dissimilar relations are stored in the similar file.
What is the max. no. Of structures that can be included in a table or structure. Nine.
explain external view
Describe the two types of methods for retrieving rows in Python? Fetchone()- Returns the next row as a sequence Fetch all()- Returns the entire result set like a strin
what is completeness constrent?
Describe Embedded Query Language? Embedded Query Language - A query language (e.g., SQL) can be implemented in two ways. It can be used interactively or embedded within a host
Removing a Synonym: DROP SYNONYM D30;
Types of Locks There are two necessary types of locks: Binary lock : This locking mechanism has two states for to a data item: locked or unlocked Multiple-mode loc
#question benefits and limitations of data models..
Given the subsequent relations: vehicle (reg_no, make, colour) Person (eno, name, address) Owner (eno, reg_no) Write expressions
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