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id

1
2
3
±í2
id  names
1    hah
1    hah1
2    aa
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ÁÐ1  ÁÐ2
1      hah,hah1
2      aa
3      null
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select a.id,wm_concat(b.name)
from ±í1 a,±í2 b
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group by a.id

select a.id, wm_concat(name)
from table_1 a, table_2 b
where a.id = b.id(+)
group by a.id;


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