楼主: sweet-air
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2750
7
求助:急!合并两张表时出错 |
大专生 50%
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回帖推荐Here is an example to help you to understand how SAS is doing in this case.
data t1;
do id=1 to 3;
a='333';
output;
end;
run;
data t2;
do id=3 to 5;
a='22';
output;
end;
run;
data all;
merge t1 t2;
by id;
run;
proc print; run;
data all;
merge t2 t1;
by id;
run;
proc print; run;
data all;
length a $4;
merge t ...
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Let them be hard, but never unjust
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