- data have;
- input id $ year qtr;
- cards;
- 张生 1999 4
- 张生 2001 4
- 王五 1998 1
- ;run;
- data want;
- set have;
- do temp = year * 4 + qtr to (year + 3) * 4 + qtr;
- year = int(temp / 4) - ~mod(temp , 4);
- qtr = temp - year * 4;
- output;
- end;
- drop temp;
- run;
- proc sort nodupkey;
- by _all_;
- run;


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