Chapter 4. Coding PROC SQL Logic
| 4.1 | Introduction 110 |
| 4.2 | Conditional Logic 110 |
| 4.3 | CASE Expressions 112 |
| 4.3.1 CASE Logic versus COALESCE Expression 114 | |
| 4.3.2 Assigning Labels and Grouping Data 116 | |
| 4.3.3 Logic and Nulls 118 | |
| 4.4 | Interfacing PROC SQL with the Macro Language 121 |
| 4.4.1 Exploring Macro Variables and Values 121 | |
| 4.4.2 Building Macro Tools and Applications 132 | |
| 4.5 | Summary 135 |
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