Oracle 把某一个字段合并到一起

column1 column2 column3

id_1　　 name_1     lable_1

id_1　　 name_1     lable_2

变为

column1 column2 column3

id_1　　 name_1     lable_1，lable_2

-- SQL

-- select code,name,wmsys.wm_concat(baname) from tab group by code,name;

select column1,column2,wmsys.wm_concat(column3)

from tab

group by column1,column2;