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