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The database files accept the actual data and are typically the biggest in size. Depending on their shape, the tables for all the user operation can go in one database file-but that's not an unique situation because it does not create the database structure very flexible for controlling access to storage for different accounts, putting the database on different storage disk drives, or backing up and restoring just phase of the database. You must have at least one database file but generally, more than one file are needed. In terms of accepting and using the data in the other objects and tables, the number of the folders is immaterial. The database files are not variable in size and never goes bigger than the size at which they were prepared
What is completeness constraint on generalization? Define the variation between total and partial design constraint. Give an example each. Ans: Completeness Constraints
Question: One of the tasks a database management system must perform is to ensure that the data is still intact in the face of software and hardware failure. This task is known
Un-Normalized Form (UNF) If a table having non-atomic values at every row, it is said to be in UNF. An atomic value is something that cannot be further decomposed. A non-atomic
INSERT INTO command : Values can be inserted for all columns or for the selected columns Values can be given by sub query. In place of values parameter substitution
The State of NewYork certifies firefighters throughout state and keep track all of them, as well as of the state’s fire departments. Each fire department has unique department numb
Column Constraints: NOT NULL, UNIQUE, CHECK, PRIMARY KEY, DEFAULT, REFERENCES, On delete Cascade : Using this key whenever a parent row is removed in a referenced
What are the two statements regarding transaction? The two statements regarding transaction of the form are:- A) Begin transaction B) End transaction
Funky Festivals Specification Funky Festivals organise music festivals which take place at various venues throughout the UK. A venue needs to be booked before a Festival can t
What is OMR? OMR (Optical Mark Recognition) is the translation of marks - or the absence of marks - but not the shape of the mark on forms that have small circles ("also called
Relational Algebra is a set of basic operations used to influence the data in relational model. These operations allow the user to specify basic retrieval request. The result of re
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