sql中rownumber降序
时间: 2023-09-11 17:03:54 浏览: 77
要在SQL中降序排列row_number,可以使用DESC关键字。例如,如果你想要按row_number降序排列,可以在查询中添加"ORDER BY row_number DESC"。这将按降序排列row_number的结果。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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相关问题
sq row_number降序
在SQL中,可以使用row_number()函数来对结果集进行编号。在使用row_number()函数时,可以通过添加over子句来指定分区和排序方式。例如,可以使用partition by子句将结果集按照某个字段进行分组,然后使用order by子句对分组内的数据进行排序。
如果想要对row_number()函数的结果进行降序排序,可以在order by子句中使用desc关键字。这样,row_number()函数返回的编号将按照降序排列。例如,可以使用以下语句来实现对row_number()结果的降序排序:
SELECT id, name, age, createTime, row_number() OVER (ORDER BY createTime DESC) AS rn
FROM mytable
在这个例子中,row_number()函数将根据createTime字段的降序对结果集进行编号,并将结果存储在rn列中。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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sqlserver中row_number
在SQL Server中,ROW_NUMBER()函数用于为查询结果集中的每一行分配一个唯一的序号。语法如下:
SELECT column_list, ROW_NUMBER() OVER (ORDER BY column ASC|DESC) AS row_number
FROM table_name
WHERE conditions;
其中,column_list是你希望查询的列,table_name是表名,conditions是查询条件。你可以根据需要选择升序(ASC)或降序(DESC)对列进行排序,以便为每一行分配一个序号。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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