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Keys, Database Management System
it can be possible to create any table without primary key
Posted Date: 10/23/2012 10:51:44 AM | Location : United States
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Keys - relational database integrity, Candidate Key: In a relation R, a ca...
Candidate Key: In a relation R, a candidate key for R is a subset of the set of attributes of R, which have the differnt two properties: (1) Uniqueness: N
What are views explain how views are different from tables, What are views?...
What are views? Explain how views are different from tables? A view in SQL terminology is a one table in which is derived from other tables. These other tables could be base t
Database manegement, how to data store?
how to data store?
Microeconomic, anyone have a textbook solutions case fair, 8 edition of vo...
anyone have a textbook solutions case fair, 8 edition of vol 1 ?, please give me
Define single value and multivalued attribute, Define Single Value and Mult...
Define Single Value and Multivalued attribute Single value attribute comprise a single atomic value for an entity and multivalued attribute may have much more than one value f
What does data dictionary is a special file contains, What does data dictio...
What does data dictionary is a special file contains ? The data dictionary is a special file contain The name of all fields in all files.The width of all fields in all files an
Atomicity-transaction , Atomicity: It describes a transaction to be a one ...
Atomicity: It describes a transaction to be a one unit of processing. We can also say either a transaction will be finished completely or not at all. In the transaction example 1
Implementation of association as an object, Implementation of association a...
Implementation of association as an object Implement as a separate association object, independent of either class, as in Figure. An association object is a group of pairs
Cascading rollback, explain cascading rollback
explain cascading rollback
BI, (a) Why did SAP introduce the extended star schema?
(a) Why did SAP introduce the extended star schema?
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