Oracle实现SQL的isnumeric 函数 CREATEORREPLACEFUNCTIONisnumeric(strinVARCHAR2)returnNUMBER is begin if strisnull then return0; else -- if regexp_like(str,'^([a-z]+|[0-9]+)$') --只包含数字0-9,小写字母a-z if regexp_like(str,'^[0-9\.]+$')--只包含数字0-9,,小数点. THEN retu...
oracle自定义判断是否数字函数isNumber() 右击function选择新增 如果是数字返回本身,如果不是数字返回0: create or replace function isNumber(p in varchar2) return number is Result number; begin result := to_number(p); return result; exception when VALUE_ERROR then return 0; end isNumber; 不用定义fun...
create or replace function IS_NUMBER(string VARCHAR2) return integer is begin if(LENGTH(TRIM(TRANSLATE(string, ' +-.0123456789', ' '))) is null ) then return 1; else return 0; end if; end IS_NUMBER;
1. 利用 to_number CREATE OR REPLACE FUNCTION isnumeric (str IN VARCHAR2) RETURN NUMBER IS v_str FLOAT; BEGIN IF str IS NULL THEN RETURN 0; ELSE BEGIN SELECT TO_NUMBER (str) INTO v_str FROM DUAL; EXCEPTION WHEN INVALID_NUMBER THEN RETURN 0; END; RETURN 1; END IF; END isnumeric; ...
使用过 asp 的应该对 isnumeric 函数不会陌生,这是一个常用的判断入参是否为数字的函数。在 oracle 中没有现成的判断是否为数字函数,下面就用三种方法来实现: 1. 利用 to_number CREATE OR REPLACE FUNCTION isnumeric (str IN VARCHAR2) RETURN NUMBER ...
create or replace function adder(n1 in number, n2 in number) return number is n3 number(8); begin n3 :=n1+n2; return n3; end; / 现在编写另一个程序来调用该函数。 DECLARE n3 number(2); BEGIN n3 := adder(11, 22); dbms_output.put_line(‘Addition is: ‘ || n3); ...
Oracle 中 isnumeric 的三种实现 1. 利用 to_number 代码语言:txt 复制 CREATEORREPLACEFUNCTIONisnumeric (strIN 代码语言:txt 复制 RETURN 代码语言:txt 复制 IS 代码语言:txt 复制 v_str 代码语言:txt 复制 BEGIN 代码语言:txt 复制 IFstrISNULL
简单的:一条语句搞定,SqlPlus里面select decode(length(replace(translate('字符串的值','0123456789.',' '),' ','')),0,'is number','is not a number') from dual; 麻烦点的:写function在oracle数据库中,create or replace function f_str_or_num(str varchar2) return varchar2 is 2 v_num numb...
The Oracle TO_NUMBER function is one of the most common number manipulation functions in Oracle. In this article and video, I’ll explain how to use the TO_NUMBER function. In this article, you’ll learn: What the TO_NUMBER function does ...
简单的:一条语句搞定,SqlPlus里面select decode(length(replace(translate('字符串的值','0123456789.',' '),' ','')),0,'is number','is not a number') from dual; 麻烦点的:写function在oracle数据库中,create or replace function f_str_or_num(str varchar2) return varchar2 is 2 v_num number...