不需要排序
select (row_number() over()) as id from generate_series(1,100)
1
根据指定的字段排序
select (row_number() over(order by xxx desc)) as id,xxx from generate_series(1,100) as xxx
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作者：kmblack1
来源：CSDN
原文：https://blog.csdn.net/kmblack1/article/details/79759995
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