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What is DAG?
The class-subclass relationship is shown by a directed acyclic graph.eg: employees can be temporary or permanent. We might be create subclasses temporary \and permanent, of the class employee.
Types of data independence Data independence can be classified into the following two types: Physical Data Independence: This means that for any change made in the physi
In an E-R diagram how attributes are represented ? In an E-R diagram attributes are represented in a ellipse.
What is an index? An index is a structure that helps to place desired records of a relation quickly, without probing all records.
notes about update opreation
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What are the benefits of document scanning? Document scanning, in addition to being cost-efficient, also enhances productivity. This service enhances security as you set the pa
I want to fragment existing table using java code... help me..!!
Define the five basic operators of relational algebra? Five basic operators of relational algebra are: 1. Union (∪∪∪∪) - Selects tuples which are in either P or Q or in both
What are the two statements regarding transaction? The two statements regarding transaction of the form are:- A) Begin transaction B) End transaction
Have a look around the site, and at some of the sites they have featured. These are all examples of bad design, and also offer an explanation about why they fall into this category
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