ORA-25446: duplicate column value for table alias: string, column: string ORACLE 报错 故障修复 远程处理
文档解释
ORA-25446: duplicate column value for table alias: string, column: string
Cause: An attempt to evaluate was made, which failed because duplicate column values were supplied for the specified table alias and column name.
Action: Check the column values specified, and try again with only one column value for each table alias, and column name.
官方解释
ORA-25446:在指定的表别名中指定的列具有重复的值,而这是在表别名的情况下是不允许的。
常见案例
一个常见的案例就是使用多表在查询语句中,但是字段名称重复了,比如:
SELECT * FROM table1 t1, table2 t2 WHERE t1.columnName = t2.columnName;
一般处理方法及步骤
1. 确认重复列,确认列字段内容和表别名。
2. 将查询语句中的多个表别名修改更正,使其一致,比如:
SELECT * FROM table1 t1, table2 t2 WHERE t1.columnName = t2.columnName;
修改为
SELECT * FROM table1 t, table2 t WHERE t.columnName = t.columnName;