oracle常用方法

一、自定义转码函数

--ASCII转换为十六进制 create or replace function AscToHex(sIn IN varchar2) RETURN varchar2 IS sTmp varchar2(4000); i integer; BEGIN i:=1; stmp:=''; for i in 1..length(sIn) loop sTmp:=sTmp||trim(to_char(ascii(substr(sIn,i,1)),'XXXX')); end loop; return sTmp; END;  

--十六进制转换为ASCII create or replace function HexToAsc(sIn IN varchar2) RETURN varchar2 IS sTmp varchar2(4000); i integer; x integer; BEGIN i:=1; stmp:=''; loop exit when i>length(sIn); x:=to_number(substr(sIn,i,2),'XXXX'); if x>128 then sTmp:=sTmp||chr(to_number(substr(sIn,i,4),'XXXX')); i:=i+4; else sTmp:=sTmp||chr(to_number(substr(sIn,i,2),'XXXX')); i:=i+2; end if; end loop; return sTmp; END;

二、