a example:

data a;
x=1;y=2; output;
x=2;y=3;output;

data b;
x=1;m=1; n=1;output;
x=2;m=2;n=2;output;

proc sql;
  create table c as
   select a.* ,b.m,b.n
   from a ,b
   where a.x=b.x ;
   quit;

哦这样可以的吗，下午公司试了一下好像a.*有点问题，明天再去试试。先谢谢了

1    data a;
2    x=1;y=2; output;
3    x=2;y=3;output;
4

NOTE: The data set WORK.A has 2 observations and 2 variables.
NOTE: DATA statement used (Total process time):
      real time           1.68 seconds
      cpu time            0.12 seconds


5    data b;
6    x=1;m=1; n=1;output;
7    x=2;m=2;n=2;output;
8

NOTE: The data set WORK.B has 2 observations and 3 variables.
NOTE: DATA statement used (Total process time):
      real time           0.01 seconds
      cpu time            0.01 seconds


9    proc sql;
10     create table c as
11      select a.* ,b.m,b.n
12      from a ,b
13      where a.x=b.x ;
NOTE: Table WORK.C created, with 2 rows and 4 columns.

14      quit;
NOTE: PROCEDURE SQL used (Total process time):
      real time           1.82 seconds
      cpu time            0.09 seconds

问题解决，真心万分感谢！

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