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what is physical data structure
Single-Valued Dependencies A database is a collection of related information and it is therefore inevitable that some items of information in the database would depend on some
what is stracture of dabms
Data Warehousing & Mining 1. What is the concept of knowledge discovery in database? 2. Describe the following types of Multidimensional Data Models. • Stars, Snowflakes and
Performance of Various Concurrency Control Mechanisms
Describe the candidate key functions ? Candidate Key and Alternate Key: In some instances, an entity will have more than one attribute which can serve as a primary key. Any key
Which operator is Cartesian product in relational algebra? Cartesian product in relational algebra is a binary operator. (It requires two operands. e.g., P X Q)
non numeric literals
What is the difference between link and reference? The fundamental difference between links and references is that links are symmetrical on the other hand references refer only
(a) Why did SAP introduce the extended star schema?
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