字符串分割函数
袁光东
分割特殊字符串连接的字符
字符串为:1001;v1.0;10;
get_part_char('1001;v10;10;',';',1)
的结果为1001
Parameters: pi_string 要处理的字符 pi_separator 分隔符 pi_count 第n个分隔符 function get_part_char(pi_string in varchar2, pi_separator in varchar2, pi_count number) return varchar2 is pos number; c_pos number; begin if pi_string is null or pi_separator is null then return ''; end if; if pi_count < 1 then return ''; end if; if pi_count = 1 then pos := instr(pi_string, pi_separator); if pos = 0 then return pi_string; else return substr(pi_string,0,pos-1); end if; else pos := instr(pi_string, pi_separator,1,pi_count -1); c_pos := instr(pi_string, pi_separator, 1, pi_count) if pos = 0 then return ''; end if; if c_pos = 0 then return substr(pi_string, pos+1, length(pi_string) - pos); else return substr(pi_string, pos+1, c_pos - pos -1); end if; end if; end get_part_char;