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  B1 C1 1 2
  B2 C2 1 2
  B1 C3 1 2
  B3 C1 1 2
  B2 C2 1 2
  B3 C3 1 2

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  ±¸¼þÃû ²Ö¿âC1 ²Ö¿âC2 ²Ö¿âC3  
  B1 -- -- --
  B2 -- -- --  
  B3 -- -- --

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SQL> with table1 as (
2 select 'B1' ±¸¼þÃû, 'C1' ²Ö¿âÃû , 1 ÊýÁ¿1 , 2 ÊýÁ¿2 from dual union all
3 select 'B2', 'C2' , 1 , 2 from dual union all
4 select 'B1', 'C3' , 1 , 2 from dual union all
5 select 'B3', 'C1' , 1 , 2 from dual union all
6 select 'B2', 'C2' , 1 , 2 from dual union all
7 select 'B3', 'C3' , 1 , 2 from dual
8 )
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