、、、 如果我使用下面的代码,我会得到ORA-00937 "not a single-group group function"错误:--Dimensions:--Measures (KPI's): SUM(COUNT_IO), --OEE: SUM(CASE我还尝试了在不使用GROUP BY的情况下执行 浏览4提问于2018-02-05得票数 0 2回答 使用CASE when语句时出现R
-- 错误的示例代码SELECTdepartment_id,AVG(salary)FROMemployeesWHEREAVG(salary)>8000GROUPBYdepartment_id;-- WHERE AVG(salary) > 8000-- *-- ERROR at line 3:-- ORA-00934: group function is not allowed here-- WHERE 子句中不能使用组函数 过滤分组:Having 字句 使用HAVING 过滤分组: 行已经被分组。
ORA-00937: not a single-group group function (2) 求每个部门的平均薪水 SQL> select department_id,avg(salary) from employees group by department_id; (3) 显示在每个部门中付给每个工作岗位的合计薪水的报告。 SQL> select department_id,job_id,sum(salary) from employees group by department_id,job...
**另外,如果要选取出来一个不加组函数的列,如上面的TITLE,就要把这个列GROUP BY !否则要出错的!信息为 :ERROR at line 1: ORA-00937: not a single-group group function 理论很简单,如果不GROUP BY TITLE,显示哪一个呢?这个在试题中经常出现。 结论:不加分组函数修饰的列必定要出现在GROUP BY 里。 错误...
**另外,如果要选取出来一个不加组函数的列,如上面的TITLE,就要把这个列GROUP BY !否则要出错的! 信息为 :ERROR at line 1: ORA-00937: not a single-group group function 理论很简单,如果不GROUP BY TITLE,显示哪一个呢?这个在试题中经常出现。
解决方法:GROUP BY中避免非精确数据类型,如FLOAT等,建议使用精确的数据类型。 报错:CREATE TABLE is not supported for current instance 问题原因:当前实例是共享集群(实例Endpoint以hgmc开头,如hgmc-cn-xxwwwkkk,可前往Hologres管控台查看实例Endpoint)或者从实例,共享集群不支持创建内部表,只能创建外部表,从实例只能查...
ORA-00937: not a single-group group function There is one case in which you can write aggregate expressions in a SELECT list without also writing a GROUP BY clause and that is when you wish those aggregate expressions to apply to the entire result set. In such a case, your SELECT list ...
CREATE PARTITION FUNCTION myRangePF1 (int) AS RANGE LEFT FOR VALUES (3, 7, 10); 为求解该查询,查询处理器将执行第一级查找操作以查找包含符合条件 T.a < 10的行的每个分区。 这将标识要访问的分区。 然后,在标识的每个分区内,处理器将针对 b 列的聚集索引执行一个二级查找以查找符合条件 T.b = ...
A user-defined function accepts parameters, performs an action such as a complex calculation, and returns the result of that action as a value. The return value can either be a scalar (single) value or a table. Use this statement to create a reusable routine that can be used in these ...
_COLUMN_ON_SINGLE_FIELD_SCHEMA、DELTA_GEOSPATIAL_NOT_SUPPORTED、DELTA_INCORRECT_LOG_STORE_IMPLEMENTATION、DELTA_MISSING_PROVIDER_FOR_CONVERT、DELTA_MODE_NOT_SUPPORTED、DELTA_NESTED_NOT_NULL_CONSTRAINT、DELTA_NON_DETERMINISTIC_FUNCTION_NOT_SUPPORTED、DELTA_OPERATION_NOT_ALLOWED、DELTA_OPERATION_NOT_ALLOWED_...