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What are the three classes of SQL expression? SQL expression consists of three clauses: Select From Where
4. Describe three ways to handle missing field values
cardnality ratio for humanresource mangement system
projects?
List the set operations of SQL? 1) Union 2) Intersect operation 3) The except operation
Explain the conventions for displaying an ER schema as an ER diagram? An E-R Diagram scheme might describe certain constraints to that the contents of a database must conform.
Probelm: a) In the context of OODBMS, define the following terms with appropriate examples. (i) Object class. (ii) Abstract class. (iii) Aggregation. (iv)
The Third Normal Form (3NF) Even though, transforming a relation that is not in 2NF into a number of relations that are in 2NF take out many of the anomalies, it does not neces
what is primary key
how many hourse have been spent on a certain project
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