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Physical Records
These are the records that are stored in the secondary storage devices. For the database relation, physical records are the group of fields kept in adjacent memory locations and retrieved mutually as a unit. Considering the page memory system, data page is the quantity of data read or written in single I/O operation to and from secondary storage device to the memory and vice-versa. In this context we describe a term blocking factor that is explained as the number of physical records per page.
Find the names of all Albums that have more than 30 tracks. Result: (name: varchar(255))
please i request for your assistance in developing a case-based online phone repair
Mention the purpose of SID and SOD lines SID (Serial input data line): It is an input line by which the microprocessor accepts serial data. SOD (Serial output data line)
What is an index? An index is a structure that helps to place desired records of a relation quickly, without probing all records.
How many types of users works on database? Users are differentiated through the way they expect to interact along with the system (i) Application programmers-interact with
Define query optimization. Query optimization refers to the process of search the lowest -cost method of evaluating a given query.
Extend your CREATE TABLE statement from problem 3 with referential integrity constraints. Updates and deletes on related rows are restricted. 6. From examination of the sample data
Insulation between conceptual and physical structures It can be defined as: 1. The Database Administrator should be capable to vary the storage structures without affectin
Define a view and a trigger. Construct a view for the above relations that have the information about suppliers and the elements they supply. The view holds the S#, SNAME, P# , PNA
List some security violations (or) name any forms of malicious access. A) Unauthorized reading of data B) Unauthorized modification of data C) Unauthorized destruction of
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