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Rick Aster: Professional SAS Programming Shortcuts: Contents

Chapter 23
Program
Creating integrity constraints

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PROC DATASETS LIBRARY=CORP NOLIST;
   MODIFY NEWHIRE; 
      IC CREATE BORN=CHECK(WHERE=(DOB < DATE()))
          MESSAGE='Birth date must be before today.';
      IC CREATE EST_HIRE=CHECK(WHERE=(HIREDATE >= '01JAN1989'D))
          MESSAGE='Hire date is missing or is too early.';
RUN;