Part V of this book contains the main discussion of the new features of Oracle8 that are relevant to PL/SQL.
Chapter 18, Object Types, describes the Oracle "object-relational model" and how the object features work.
Chapter 19, Nested Tables and VARRAYs, examines the two types of "collection" structures introduced in Oracle8.
Chapter 20, Object Views, describes object views, which let you use object features with conventional relational tables.
Chapter 21, External Procedures, discusses how you can call out to non-PL/SQL programs from within Oracle.
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