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Script: oracle 判断字符是否是日期格式

如果在原数据中表中数据是以字符串形式保存,现在要转换为date日期类型时有部分数据格式会出错,这就需要查出那些异常数据

1,可以用正则,这个比较麻烦每月天数不一样,闰年2月天数又不一样等 等

2,自己写一funcation ,捕获异常判断

sql如下

CREATE OR REPLACE FUNCTION isdate (datestr VARCHAR2, format VARCHAR2)
RETURN INT
IS
p_date   DATE;
BEGIN
   SELECT TO_DATE (datestr, format)
   INTO p_date
FROM DUAL;

   RETURN 1;
EXCEPTION
  WHEN OTHERS
THEN
   RETURN 0;
END;

/

————–

调用比如

select * from 表名 where isdate(colname,’yyyy-mm-dd’)=0;

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  1. Marguerite Clack | #1
    2011-12-21 at 07:31

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