ORA-00937: not a single-group group function --使用having子句过滤分组结果 --查询平均工资高于的部门号,及其平均工资。 select deptno,avg(sal) from emp group by deptno having avg(sal)>2000; 1 2 3 4 5 6 idle> select deptno,avg(sal) from emp group by deptno having avg(sal)>2000; DEPTNO...
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_...
ORA-00937: not a single-group group function --使用having子句过滤分组结果 --查询平均工资高于的部门号,及其平均工资。 select deptno,avg(sal) from emp group by deptno having avg(sal)>2000; --查出平均工资在以上的工种(job) select job,avg(sal) from emp group by job having avg(sal)>2000; -...
ORA-00937: not a single-group group function --使用having子句过滤分组结果 --查询平均工资高于的部门号,及其平均工资。 select deptno,avg(sal) from emp group by deptno having avg(sal)>2000; idle> select deptno,avg(sal) from emp group by deptno having avg(sal)>2000; DEPTNO AVG(SAL) --- ...
**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。
SELECT cust_nbr, sales_emp_id, COUNT(order_nbr)FROM cust_order;SELECT cust_nbr, sales_emp_id, COUNT(order_nbr) * ERROR at line 1: 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 GRO...
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。 错误实例: SQL> SELECT dept_id, AVG(salary) 2 FROM s_emp 3 WHERE AVG(salary) > 2000 ...
从表访问数据时,可以使用不同的方法对数据进行计算,例如,计算标量值,以及对查询文本中定义的数据进行聚合和排序(例如,使用 GROUP BY 或ORDER BY 子句时),以及如何筛选数据(例如在使用 WHERE 或HAVING 子句时)。从潜在的多个可能的计划中选择一个执行计划的过程称为“优化”。 查询优化器是数据库引擎最重要的组件...
Forum FAQ: Why do I get a 'conversion failed' error when using the CASE expression?Question In SQL Server, I use a CASE expression to return different values base on a...Date: 04/10/2011Forum FAQ: How do I get group total in Group Footer with PageBreak in SQL Server Reporting ...
ROW_LEVEL_SECURITY_TABLE_CLONE_TARGET_NOT_SUPPORTED、ROW_LEVEL_SECURITY_UNSUPPORTED_PROVIDER、SCALAR_SUBQUERY_IS_IN_GROUP_BY_OR_AGGREGATE_FUNCTION、STAR_GROUP_BY_POS、STREAMING_AQE_NOT_SUPPORTED_FOR_STATEFUL_OPERATORS、STREAMING_FROM_MATERIALIZED_VIEW、STREAMING_REAL_TIME_MODE、ST_NOT_ENABLED、ST_...