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What is NULL?
Simply NULL means not in value.
anyone have a textbook solutions case fair, 8 edition of vol 1 ?, please give me
what is correlation in nested query
In an E-R diagram how attributes are represented ? In an E-R diagram attributes are represented in a ellipse.
Analyzing Association Traversal Association Traversal shall be understood properly for the association design explanation. Analyzing association traversal means analyzing tra
What is a Built-in A notation of identity is built-into the data model or programming language and no user-supplied identifier is needed. This form of identity is used in objec
What is schema
Problem 1 Why are the operational system keys not recommended for forming data warehouse primary keys? Give any two examples 2 Explain the following performance tuning techn
4. Describe three ways to handle missing field values
Mixed fragmentation: Sometimes, horizontal fragmentation or vertical fragmentation of a database schema by itself is insufficient to sufficiently distribute the data for some appli
why are older data models are being replaced by new data models
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