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What is Data dictionary?
A data dictionary is a reserved space in a database that is employed to store information about the database itself.
A data dictionary may consist of information like:
a)Database design information
b)Stored SQL procedures
c)User permissions
d)User statistics
e)Database process information
f)Database growth statistics
g)Database performance statistics
What is called a query -execution engine? The query implementation engine takes a query evaluation plan, implements that plan, and returns the answers to the query.
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how to prepare a data dictionary for online examination system for certified courses?
Which data type can store unstructured data? Raw data type can store unstructured data.
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