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id    code  pname
1    HY001    b1
2    HY001    b2
3    HY002    c1
4    HY003    a1
4    HY003    a2
4    HY003    a3
5    HY004    f1
5    HY004    f2

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id    code  pname  num
1    HY001    b1  1
2    HY001    b2  2
3    HY002    c1  1
4    HY003    a1  1
4    HY003    a2  2
4    HY003    a3  3
5    HY004    f1  1
5    HY004    f2  2

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4  HY003  a1  1
4  HY003  a2  2
4  HY003  a3  3

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