SQL函数学习 之 DENSE_RANK() OVER (PARTITION BY col2 ORDER BY col3 DESC) AS seq
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前言:单词介绍
DENSE 连续(愿意:密集的)
RANK 排序(原意:等级)
PARTITION 分组(原意:划分)
DENSE 连续(愿意:密集的)
********189 张三 1
********189 张三 1
********188 李四 2
这个是不连续的
********189 张三 1
********189 张三 1
********188 李四 3
DENSE_RANK() OVER (PARTITION BY col2 ORDER BY col3 DESC) AS seq
待续。。。。。。
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