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Rick Aster: Professional SAS Programming Shortcuts: Contents

Chapter 51
Program
Hierarchy linking

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*
   TAX.FAMILY: ORDER, FAMILY
*;
PROC SORT DATA=TAX.FAMILY OUT=WORK.LEVEL2;
   BY ORDER;
RUN;
*
   TAX.GENUS: FAMILY, GENUS
*;
PROC SORT DATA=TAX.GENUS OUT=WORK.LEVEL3;
   BY ORDER;
RUN;
*
   WORK.HIER3: ORDER, FAMILY, GENUS
*;
DATA WORK.HIER3;
   MERGE WORK.LEVEL2 WORK.LEVEL3;
   BY ORDER;
RUN;
PROC SORT DATA=WORK.HIER3;
   BY GENUS;
RUN;
*
   TAX.SPECIES: GENUS, SPECIES
*;
PROC SORT DATA=TAX.SPECIES OUT=WORK.LEVEL4;
   BY GENUS;
RUN;
*
   WORK.HIER3: ORDER, FAMILY, GENUS, SPECIES
*;
DATA WORK.HIER;
   MERGE WORK.HIER3 WORK.LEVEL4;
   BY GENUS;
RUN;