Oracle分組後對分組內容重複 取第一個

Oracle分組後對分組內容重複 的以另一列排序後 取第一個 語句 select * from( select a.grep, row_number() over (partition by a.grep order by a.create_time desc nulls last) row_num from test a ) aa   where aa.row_num = 1 --獲取分組排序後

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