最近,将原来的数字符字段转换为数字时,总报错误:无效数字。
如何找出其中哪些是非数字字符的记录?比较麻烦的事。下面是用Oracle DB自带的函数translate可以找出来的
1.创建测试表
Create Table TestChar(
ITEM_NUMBER VARCHAR2(20)
);
2.手工插入测试记录
Insert Into TestChar (ITEM_NUMBER) values ('312');
Insert Into TestChar (ITEM_NUMBER) values ('312');
Insert Into TestChar (ITEM_NUMBER) values ('4412');
Insert Into TestChar (ITEM_NUMBER) values ('152');
Insert Into TestChar (ITEM_NUMBER) values ('162');
Insert Into TestChar (ITEM_NUMBER) values ('172');
Insert Into TestChar (ITEM_NUMBER) values ('142');
Insert Into TestChar (ITEM_NUMBER) values ('142');
Insert Into TestChar (ITEM_NUMBER) values ('112');
Insert Into TestChar (ITEM_NUMBER) values ('1d2');
Insert Into TestChar (ITEM_NUMBER) values ('152');
Insert Into TestChar (ITEM_NUMBER) values ('125');
Insert Into TestChar (ITEM_NUMBER) values ('162');
Insert Into TestChar (ITEM_NUMBER) values ('712');
Insert Into TestChar (ITEM_NUMBER) values ('A712');
commit;
3.妙用Oracle 内置函数Translate找出非数字字符的记录
select trim(translate(RTRIM(LTRIM(ITEM_NUMBER)), '#0123456789', '#'))
from TestChar
Where trim(translate(RTRIM(LTRIM(ITEM_NUMBER)), '#0123456789', '#')) is not null;
出处:http://blog.csdn.net/chenxianping/article/details/6338045
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再看看另外一个写的,也比较实用。
--1.正则判断,适用于10g以上版本 --非正整数 select 字段 from 表 where regexp_replace(字段,'d','') is not null; --非数值类型 select 字段 from 表 where regexp_replace(字段,'^[-+]?d+(.d+)?$','') is not null; --2.自定义函数,判断非值类型 create or replace function isnumber(col varchar2) return <a href="https://www.baidu.com/s?wd=integer&tn=44039180_cpr&fenlei=mv6quAkxTZn0IZRqIHckPjm4nH00T1YdmWndnynknWfzrjDYuHF90ZwV5Hcvrjm3rH6sPfKWUMw85HfYnjn4nH6sgvPsT6KdThsqpZwYTjCEQLGCpyw9Uz4Bmy-bIi4WUvYETgN-TLwGUv3EPjDvPjDYPHDs" target="_blank" class="baidu-highlight">integer</a> is i number; begin i := to_number(col); return 1; exception when others then return 0; end; select 字段 from 表 where isnumber(字段)=0;
出处:https://zhidao.baidu.com/question/416414510.html