15
Collections
Throughout this book, you have explored different types of PL/SQL identifiers or variables that represent individual elements (for example, a variable that represents a grade for a particular student). However, often in your programs, you want to have the ability to represent a group of elements (for example, the grades for a class of students). To support this technique, PL/SQL provides collection data types that work just like arrays available in other third-generation programming languages.
A collection is a group of elements of the same data type. Each element is identified by ...
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