count(...) over(partition by ... order by ...) --求分组后的总数。 sum(...) over(partition by ... order by ...) --求分组后的和。 max(...) over(partition by ... order by ...) --求分组后的最大值。 min(...) over(partition by ... order by ...) --求分组后的最小...
SELECT*,COUNT(*)OVER(PARTITIONBYGroupname)每个组的个数,COUNT(*)OVER(PARTITIONBYGroupnameORDERBYID)每个组的累积个数,COUNT(*)OVER(ORDERBYID)累积个数,COUNT(*)OVER()总个数fromEmployee 返回的结果如下图: 后面的每个开窗函数就不再一一解读了,可以对照上面SUM后的开窗函数进行一一对照。 OVER在排序函数...
<窗口函数> over (partition by <用于分组的列名> order by <用于排序的列名>) 专用窗口函数,比如rank, dense_rank, row_number等 聚合函数,如sum. avg, count, max, min等1|2窗口函数功能不减少原表的行数,所以经常用来在每组内排名 同时具有分组(partition by)和排序(order by)的功能...
SELECT *, COUNT(*) OVER(ORDER BY dt RANGE BETWEEN 1 PRECEDING AND CURRENT ROW) FROM MyTestTable1 ; 结果: 可见上述SQL对MyTestTable1的作用效果和PARTITION类似,使用MyTestTable2测试。 SELECT *, COUNT(*) OVER(ORDER BY c1 RANGE BETWEEN 1 PRECEDING AND CURRENT ROW) FROM MyTestTable2 结果: 可...
select count(*) over (PARTITION BY offer_status) as count, name, status from tablename Output will be as: 3 | name1 | entered 3 | name1 | entered 3 | name2 | cleared 1 | name3 | completed 3 | name3 | cleared 3 | name1 | entered 3 | name2 | cleared I...
SELECT FName, FCITY, FAGE, FSalary, COUNT(FName) OVER(PARTITION BY FCITY) FROM T_Person OVER(PARTITION BY FCITY)表示对结果集按照FCITY进行分区,并且计算当前行所属的组的聚合计算结果。在同一个SELECT语句中可以同时使用多个开窗函数,而且这些开窗函数并不会相互干扰。比如下面的SQL语句用于显示每一个人...
SUM(Salary)OVER (ORDER BYID) 只对ORDER BY 后的ID内容进行排序,对排完序后的Salary进行累加处理。 SUM(Salary)OVER () 对Salary进行汇总处理 COUNT后的开窗函数 SELECT *, COUNT(*) OVER(PARTITION BY Groupname ) 每个组的个数, COUNT(*) OVER(PARTITION BY Groupname ORDER BY ID) 每个组的累积个数...
()-interval'6 month')OVER(PARTITIONBYCOLA, COLB, COLC)/6.0)/(SUM(COLD)FILTER(WHEREdatumisnotnull)OVER(PARTITIONBYCOLA))*100>=10THENcount((SUM(COLD)FILTER(WHEREdatum>=now()-interval'6 month')OVER(PARTITIONBYCOLA, COLB, COLC)/6.0)/(SUM(COLD)FILTER(WHEREdatumisnotnull)OVER(PARTITIONBY...
ROW_NUMBER()函数将针对SELECT语句返回的每一行，从1开始编号，赋予其连续的编号。在查询时应用了一个...
count(1) over(partition by docnum) count()函数统计字段docnum的数量,再分组字段docnum,不排序仅统计个数。 SELECT t.docnum FROM (select m.* , count(1) over (partition by docnum) as cnt from F0411 m) T WHERE T.STATUS = 'FULL' AND CNT = 1; ...