Download Introduction to Database Queries.

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Database Queries:
A Tool used in databases to search for
specific information within records.
Simple
Complex
Simple Query: Only searches for one piece of
information.
Complex Query: Searches for multiple pieces of
information in one search.
And Query.
For a higher level, you need to show you can
write complex queries and explain what they are
doing. The tasks on Moodle will help you do
that.