Data Management Solutions Using SAS Hash Table Operations

Chapter 4: Item-Level Operations: Enumeration

4.1 Introduction

4.2 Enumeration: Basics and Classification

4.2.1 Enumeration as a Process

4.2.2 Enumerating a Hash Table

4.2.3 KeyNumerate (Key Enumerate) Operation

4.2.4 Enumerate All Operation

4.3 KEYNUMERATE Operation

4.3.1 KeyNumerate Operation Mechanics

4.3.2 FIND_NEXT: Implicit vs Explicit

4.3.3 Other KeyNumerate Coding Styles

4.3.4 Version 9.4 Add-On: DO_OVER

4.3.5 Forward and Backward, In and Out

4.3.6 Staying within the Item List (Keeping It Set)

4.3.7 HAS_NEXT and HAS_PREV Peculiarities

4.3.8 Harvesting Hash Items

4.3.9 Harvesting Hash Items via Explicit Calls

4.3.10 Selective DELETE and UPDATE Operations

4.3.11 Selective DELETE: Single Item

4.3.12 Selective Delete: Multiple Items

4.3.13 ...