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Which model is record based logical model?
Network Modelis basically known as record based logical model.
Consider an information system designed for an online company which provides IT products and services. These include desktops, laptops, networking products, IT books, parts, and te
While sorting field groups we cannot use more than one key field False.
normal forms
can you create a database for me in oracle/sql
Define the following constraints for the table client. (i) BAL_DUE must be at least 1000. (ii) NAME is a unique key. (i)ALTER TABLE CLIENT ADD CONSTRAINT CLIENT_BAL_DUE_C1
Eliminate Columns Not Dependent On Key The Employee Relation satisfies - First normal form - As it has no repeating groups. Second normal form - As it do not have multi-a
Explain natural join? Natural Join - Similar as equi-join except in which the join attributes (having similar names) are not involved in the resulting relation. Only one sets
Describe Parameteric end users? Parametric end users might be given update access, but are commonly not permitted to change the structure of data.
Find the names of all Albums that have more than 30 tracks. Result: (name: varchar(255))
write on the various type of relationalkey
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