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SELECT @s+=ColumnName+','  from #A;
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create table tb(id varchar(3) , pid varchar(3) , name varchar(10))
insert into tb values('001' , null  , '¹ã¶«Ê¡')
insert into tb values('002' , '001' , '¹ãÖÝÊÐ')
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declare
i number:=0;          /*ÉùÃ÷±äÁ¿¾®¸ø³õÖµ*/
t number:=1;
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begin ......
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