Chapter 6:  Managing Hash Objects 
Creating, Deleting, and Clearing Hash Objects During Execution of a DATA Step
Determining the Number of Items in a Hash Object
Application Example: Creating a Data Set for Each BY Group
Comparing Two Hash Objects
Specifying Memory Structure Usage of a Hash Object
Determining the Size of an Entry in a Hash Object

This chapter focuses on the hash methods and argument tags that can help you manage creation and deletion of hash objects. These methods allow you to dynamically create, clear, delete, and compare hash objects during execution of a DATA step. When your applications are complex and have the potential to consume too much memory or conflict with other processes, you can adjust how SAS allocates memory ...

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