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id name num date
1 aa 2 2009-1-1
1 aa 3 2009-3-1
1 aa 2 2009-3-4
2 bb 3 2009-4-2
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id name num date
1 aa 1 2009-2-1
2 bb 2 2009-4-8
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1 aa 3 2009-3-1
1 aa 2 2009-3-4
2 bb 1 2009-4-8
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