要合并那个字段呀？

合并成这样

能看得到图吗

data STOCK;
INPUT COM_CODE $ 8.  TYPE $ 8.;
CARDS;
C000001   A
C000002   A
C000002   B
C000003   A
C000003   B
;RUN;
PROC SORT DATA=STOCK;
BY COM_CODE TYPE ;
RUN;

DATA X1;
SET STOCK;
IF FIRST.COM_CODE;
BY COM_CODE;
RUN;

PROC SQL;
CREATE TABLE X2 AS SELECT A.COM_CODE , A.TYPE , B.TYPE AS TYPE2  FROM X1 A  LEFT JOIN STOCK B
ON A.COM_CODE=B.COM_CODE AND B.TYPE NE A.TYPE;

还想问一下中间其余变量怎么保留 B股股票名称怎么提出来?