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mapping, Database Management System
external and internal mapping with examples
Posted Date: 3/19/2013 11:48:43 AM | Location : USA
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What is the difference between primary key and a unique key, What's the dif...
What's the difference between a primary key and a unique key? Both primary key and unique key enforces uniqueness of the column on which they are explained. But by default prim
Explain displaying an er schema as an er diagram, Explain the conventions f...
Explain the conventions for displaying an ER schema as an ER diagram? An E-R Diagram scheme might describe certain constraints to that the contents of a database must conform.
A basic model of database access control, A basic model of Database Access ...
A basic model of Database Access Control Models of database access control have grown out of previous work on protection in operating systems. Let us talk about one simple mode
Can a filed occur in several field groups, Can a filed occur in several fie...
Can a filed occur in several field groups. Yes. But it leads to redundant data redundancy.
B2b business uk database, We have a new website where I need someone to 1: ...
We have a new website where I need someone to 1: Inhabit the back end with all the recruitment agencies in the UK. I require someone who is not manually going to do this, but who w
Aims of the design project, The aims of the project are: 1. To enable th...
The aims of the project are: 1. To enable the students to undertake the detailed design of a specific plant or process 2. The design projects includes: process selection; und
Dataware house, ) Define a job scheduling strategy that will meet business ...
) Define a job scheduling strategy that will meet business requirement of reporting availability by 6am CST for the following cubes? Show the job scheduling dependencies in a picto
How can you map null values to other values while display, How can you map ...
How can you map NULL values to other values while display? IF( ) , IFNULL( ) keywords are used to do so. They are 'LIMIT' is used for the following kinds of problems: 1) Ans
Deletion operation - update operations, By using the delete operation some ...
By using the delete operation some consisting records can be deleted from a relation. To delete some definite records from the database a condition is also specified based on which
Define hot backup, Hot Backup: Some sites cannot terminate the database wh...
Hot Backup: Some sites cannot terminate the database while creating a backup copy of the files. The cold backup is not a reliable option. So different kinds of backing up database
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