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Programming Interfaces
Input/Output Processes : Alternate I/O Sources : Changing the input source of a procedure
 

Changing the input source of a procedure

You use the INPUT FROM statement to name a new source for input. The possible sources include an operating system file or device, the contents of an operating system directory, or the terminal (by default).
All statements (such as UPDATE or SET) that require data use the new input source.
* Input from files
* Input from devices, directories, and the terminal
* Receiving input from multiple sources
* Reading input with control characters