oracle數據轉換方法，將字典表的id值以文本形式展示

• （本文原創，引用請注明出處--zhangjieatbky）
• 應用場景：例如，將某字段中存放的id值，如1,2,3轉換成文本展示，如 籃球、足球、排球
  • 　創建兩張表

  • create a1(id number(8),text varchar(15));        //創建字典表
    insert into a1 values(10,足球);
    insert into a1 values(11,籃球);
    insert into a1 values(12,羽毛球);
    insert into a1 values(13,排球);
    
    create b1(bid number(8),btext varchar2(15));        //業務主表
    insert into b1 values(1000,'10,11,13');
    insert into b1 values(2000,'11,12');

  • 創建轉換函數

  • //創建函數
    create or replace function converter(
           p_bid b1.bid%type)
    return varchar2
    as
      v_len number(2);
      v_dict_text varchar(80);
      v_index binary_integer :=1;
      v_result varchar(150):='';
      v_temp1 varchar2(3);
      v_temp2 varchar2(50);
    begin
      select b1.btext into v_dict_text from b1 where bid=p_bid;
      select length(translate(v_dict_text, 'a0123456789', ' ')) into v_len from dual;
      while v_index <= v_len+1 loop
        SELECT regexp_substr(v_dict_text, '[[:alnum:]]+', 1, v_index ) INTO v_temp1 FROM dual;
        SELECT TEXT INTO v_temp2 FROM A1 WHERE ID=v_temp1;
        v_result:=concat(concat(v_result,v_temp2),',');
        v_index := v_index+1;
      end loop;
      RETURN SUBSTR(v_result,0,length(v_result)-1);
    end converter;
    
    //測試結果，如下圖，成功將字典值轉為文本值
    SELECT BID,converter(BID) TEXT from B1      

  • 結果如下
  •