最近,將原來的數字符字段轉換爲數字時,總報錯誤:無效數字。html
如何找出其中哪些是非數字字符的記錄?比較麻煩的事。下面是用Oracle DB自帶的函數translate能夠找出來的函數
1.建立測試表測試
Create Table TestChar(
ITEM_NUMBER VARCHAR2(20)
);spa
2.手工插入測試記錄.net
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;code
3.妙用Oracle 內置函數Translate找出非數字字符的記錄regexp
select trim(translate(RTRIM(LTRIM(ITEM_NUMBER)), '#0123456789', '#'))
from TestChar
Where trim(translate(RTRIM(LTRIM(ITEM_NUMBER)), '#0123456789', '#')) is not null;htm
出處:http://blog.csdn.net/chenxianping/article/details/6338045blog
=======================================================get
再看看另一個寫的,也比較實用。
--1.正則判斷,適用於10g以上版本 --非正整數 select 字段 from 表 where regexp_replace(字段,'\d','') is not null; --非數值類型 select 字段 from 表 where regexp_replace(字段,'^[-\+]?\d+(\.\d+)?$','') is not null; --2.自定義函數,判斷非值類型 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;
出處:https://zhidao.baidu.com/question/416414510.html