个人博客创业记录-oracle metalink账号|Oracle Metalink账号注册指南

create or replace function ischar(chr varchar2) return varchar2 is
ischr varchar2(5);
begin
select case
when ascii(chr) between 65 and 122 THEN
‘true’
else
‘false’
end
intoracle账号o ischr
from dual;
return ischr;
end;