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Chapter 4: SQL

Chapter 4: SQL . Complex Queries Views Modification of the Database Joined Relations Security and Authorization Embedded SQL/ODBC/JDBC. Derived Relations. SQL allows a subquery expression to be used in the from clause

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Advanced SQL

Advanced SQL. Murat Kantarcioglu Adapted from Silberchatz et al. slides. NULL Values. It is possible for tuples to have a null value, denoted by null , for some of their attributes null signifies an unknown value or that a value does not exist.

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Chapter 4: SQL

Advanced SQL