Oracle RANK() function examples We’ll use theproductstable from thesample databasefor demonstration. Oracle RANK() function simple example The following statement calculates the rank of each product by its list price: SELECTproduct_name, list_price,RANK()OVER(ORDERBYlist_priceDESC)FROMproducts;Cod...
In this example: The PARTITION BYclause divided the result set into two partitions by year, 2016 and 2017. The ORDER BY clause sorted rows in each partition by sales amount from high to low. The PERCENT_RANK() function was then applied to the value of each row in each partition. In th...
select500population,'USA'nation,'Bostom'city from dual union all select500population,'Japan'nation,'Tokyo'city from dual)select population,nation,city,listagg(city,',')withinGROUP(order by city)over(partition by nation)rank from temp 运行结果: 总结:LISTAGG()把它当作SUM()函数来使用就可以了。 ...
二、RANK, DENSE_RANK, FIRST and LAST Analytic Function 参考网址:http://www.oracle-base.com/articles/misc/rank-dense-rank-first-last-analytic-functions.php 1、RANK 当我们需要根据某个条件去获取排序号,或者排名的时候,我们可以使用RANK: 1SELECTempno,2deptno,3sal,4rank()over(PARTITIONBYdeptnoORDERBY...
排序窗口函数:如ROW_NUMBER(), RANK(), DENSE_RANK()等。 应用场景 累计总和:计算到目前为止的总和。 移动平均:计算一定范围内的平均值。 可能的问题及原因 分区问题:如果使用了PARTITION BY子句,SUM()函数会在每个分区内独立计算总和,可能会导致某些记录被跳过。 排序问题:如果使用了ORDER BY子句,SUM()...
Within each function, you can specify multiple ordering expressions. Doing so is especially useful when using functions that rank values, because the second expression can resolve ties between identical values for the first expression. 每个函数内可以指定多个排序表达式。当使用函数给值排名时,尤其显得意义...
The total Appointments associated to Leads (Activity function = Appointments) The total Call Reports associated to Leads (Activity function = Call Reports) The total Tasks associated to Leads (Activity function = Task) The total Activities for highly ranked Leads (Lead Rank = Hot) The rate of ...
listagg(city,',') within GROUP (order by city) over (partition by nation) rank from temp 运行结果 Oracle Database SQL Language Reference上有关listagg()函数的描述如下: Purpose For a specified measure, LISTAGG orders data within each group specified in the ORDER BY clause and then concatenates...
Within each function, you can specify multiple ordering expressions. Doing so is especially useful when using functions that rank values, because the second expression can resolve ties between identical values for the first expression. 每个函数内可以指定多个排序表达式。当使用函数给值排名时,尤其显得意...
The aggregate functions MIN, MAX, SUM, AVG, COUNT, VARIANCE,and STDDEV, when followed by the KEEP keyword, can be used inconjunction with the FIRST or LAST function to operate on a setof valuesfroma set of rows that rank as the FIRST or LAST withrespect to a given sorting specification...