java.sql.SQLException列名无效

下面是提示我的错误，我检查了数据库的数据类型是一致的。还有可能是什么问题，急求大神帮助！！！！
java.sql.SQLException: 列名无效
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:112)
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:146)
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:208)
at oracle.jdbc.driver.OracleStatement.getColumnIndex(OracleStatement.java:3296)
at oracle.jdbc.driver.OracleResultSetImpl.findColumn(OracleResultSetImpl.java:1914)
at oracle.jdbc.driver.OracleResultSet.getString(OracleResultSet.java:1515)
at dao.SalaryDao.createSalary(SalaryDao.java:42)
at dao.SalaryDao.findAll(SalaryDao.java:25)
at action.FindSalaryAction.execute(FindSalaryAction.java:24)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)

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