Oracle 之 ORA-01847: day of month must be between 1 and last day of month

當我們在從oracle中取數據的時候有時會報一下錯誤：

 nested exception is java.sql.SQLDataException: ORA-01847: day of month must be between 1 and last day of month

所使用的SQL文大概是：

 select date_field1, date_field2 from table

where to_date(date_field1,'yyyy-mm-dd') < to_date(date_field2,'yyyy-mm-dd')

問題分析：時間格式不對

解決方案：修改Where條件，結果如下：

 select date_field1, date_field2 from table

where to_date(date_field1,'DD-MON-YYYY') < to_date(date_field2,'DD-MON-YYYY')

問題完美解決！！！