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create table t1 (AA varchar2(20), BB varchar2(10), CC number(3));
insert into t1 values ('jack','A',80);
insert into t1 values ('rose','B',60);
insert into t1 values ('lucy','C',70);
insert into t1 values ('lili','A',95);
insert into t1 values ('lei','B',85);
insert into t1 values ('doufu','C',75);
commit;
select wm_concat(decode(rn,1,aa,null)) AA,wm_concat(decode(rn,1,bb,null)) bb,wm_concat(decode(rn,1,cc,null)) cc,
wm_concat(decode(rn,2,aa,null)) AA1,wm_concat(decode(rn,2,bb,null)) bb1,wm_concat(decode(rn,2,cc,null)) cc1,
wm_concat(decode(rn,3,aa,null)) AA2,wm_concat(decode(rn,3,bb,null)) bb2,wm_concat(decode(rn,3,cc,null)) cc2
from
(select AA,BB,CC,rownum rn from t1 where rownum<=3)
AA BB CC AA1 BB1 CC1 AA2 BB2 CC2
-----------------------------------------------------------------
1 jack A 80 rose B 60 lucy C 70