执行查询时出现无效的数字错误

Question

我需要您的帮助，因为我收到的错误，我使用以下查询才能查看表格中某个百分比列的平均值，但它给出了以下错误消息：

ORA-01722: invalid number
01722. 00000 -  "invalid number"
*Cause:    
*Action:

查询：

SELECT 'Skybox' as Platform,avg(PER_OF_VIOLATING_RULES) as 
ComplianceCalculation from table_name

PER_OF_VIOLATING_RULES列中的值：

PER_OF_VIOLATING_RULES
32.08%
55.77%
54.19%
54.84%
16.13%
23.22%
29.50%
5.56%
48.50%
56.04%

PER_OF_VIOLATING_RULES列是varchar2数据类型。

Answer 1

尝试替换%符号：

 SELECT 'Skybox' as Platform,avg(replace(PER_OF_VIOLATING_RULES, '%', '')) as ComplianceCalculation from table_name