Using the bank example, write relational-algebra queries to find the accounts held by more than two customers

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Using the bank example, write relational-algebra queries to find the accounts held by more than two customers in the following ways:

a. Using an aggregate function.

b. Without using any aggregate functions.

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Database System Concepts

ISBN: 978-0072554816

4th Edition

Authors: Henry F. Korth, S. Sudarshan

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