| Debugging and Testing DATA Steps |
| Understanding DATA Step
Processing |
| Execution Phase
At the bottom of the DATA step, the values in the program data vector are written to the data set as the second observation. |
Second, control returns to the top of the DATA step. Third,
SAS retains the values of variables that were read from a SAS data set with
the SET statement, or that were created by a sum statement. All other variable
values, such as the variable Interest, are set to missing. |
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