row_number() over (partition by..order by...)分组排序
例:select1a,2b,3cfromdualunionallselect2a,6b,7cfromdualunionallselect1a,3b,4cfromdualunionallselect2a,5b,6cfromdualunionallselect1a,4b,5cfromdual结果:1、使用row_number()over(partitionby..orderby...)可以对这些数据进