文档解释
ORA-54015: Duplicate column expression was specified
Cause: Expression of the virtual column being added/created conflicts with an existing/previously specified functional index expression or virtual column expression
Action: Change the expression of the virtual column os there are no duplicate expressions
ORA-54015: Duplicate column expression was specified 指明了目标表中定义了两个具有相同名称的表达式,这是数据库产生的错误。
官方解释
ORA-54015: duplicate column expression was specified
Cause: A query specified by the user specified a duplicate expression for a column in the output table.
Action: Check the query for typos, duplicate aliases, and other syntax errors. Make sure that each column of the query is unique.
常见案例
一般处理方法及步骤
1. 确定目标表中是否存在两个重复的列或表达式,如果存在,建议删除其中一个以解决此问题。
2. 检查数据库查询语句,找出任何错别字或重复的别名及其他语法错误,以确保每列的查询都是唯一的。
3. 此外,也可以删除在语句中的目标列的空白别名,以使表达式唯一。