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Rick Aster: Professional SAS Programming Shortcuts: Contents

Chapter 51
Program
Merge after interleaving

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data ab / view=ab;
   set a b;
   by x1 x2;
run;
data cd / view=cd;
   merge c (in=in1) d (in=in2);
   by x1;
   if in1 and in2;
run;
data e;
   merge ab cd;
   by x1 x2;
run;