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Relational and E-R Model
There are three types of constraints on relational database that have:
i need to implememnt a treee based mining algorithm. do you have an expert that can do that?
Find out the names and company names of all employees sorted in ascending order of company name and descending order of employee names of by which company. SELECT EMPLOYEE_NAME,
Have database built but having problems with some questions that go with the database
What are the advantages of Logical Databases? It offers a simple-to-use selection screens. You can change the pre-generated selection screen to your needs. It offers check f
Failure Controlling Methods: Failures can be handled using different recovery methods that are talk about later in the unit. But the first question is doing we really require recov
What are temporary tables? Temporary tables exist solely for a particular session or whose data persists for the duration of the transaction.
A super key is an attribute or set of attributes used to recognize the records uniquely in a relation. For instance, in the Relation PERSON defines earlier PERSON_ID is a super
What is system catalog or catalog relation? How is better known as? A RDBMS maintains a explanation of all the data that it contains, information about every relation and index
Some disadvantages of File Oriented System ?
what is cascading rollback
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