Sql 如何循环并输出原始值

我正在将值打印到输出，但我不确定如何在更新和显示原始值之前获取原始值

declare
    v_ids varchar2(4000); 

   begin

   update time_line tl
   set tl.limit_template = 'LIM0178'
    where tl.limit_template IN
       (select tl.limit_template
          from base_timeline_section bbts,
               base_timeline_org     bts,
               trmt_timeline         tl
         where bbts.base_trmt_set_id = bts.base_trmt_set_id
           and tl.limit_id = bts.limit_id
           and bbts.bse_trmt_st_tplt_id = '720')
       returning listagg(tl.limit_template, ',') within group 
                     (order by tl.limit_template) into v_ids;
     dbms_output.put_line('Updated IDs: ' || v_ids || ' to LIM0178');
     end;

现在我得到以下输出：更新的ID：

LIM0178至LIM0178

我想要的是

原值：6165改为新值：LIM0178

---

在更新之前，您可以将值放在一个变量中，并根据需要使用它。 您可以找到此链接了解更多信息

---

我不确定语法，如果发现任何错误，您可以进一步检查并更正此ans。

我认为您可以中断语句，将值返回到变量中，并传递变量以更新值，因为它是逗号分隔的。它可以是一个值列表，这样它将执行选择：-

   declare
    v_ids  clob; 
    v_ids2 clob;
   begin
    select RTRIM(XMLAGG(XMLELEMENT(E,tl.limit_template,',').EXTRACT('//text()') ORDER BY tl.limit_template).GetClobVal(),',') into v_ids
      from base_timeline_section bbts,
           base_timeline_org     bts,
           trmt_timeline         tl
     where bbts.base_trmt_set_id = bts.base_trmt_set_id
       and tl.limit_id = bts.limit_id
       and bbts.bse_trmt_st_tplt_id = '720';

  update time_line tl
     set tl.limit_template = 'LIM0178'
   where tl.limit_template IN (select REGEXP_SUBSTR (DBMS_LOB.substr(v_ids,30000), '[^,]+', 1, level) 
                               from (select rownum from dual ) 
                            connect by level <= length(regexp_replace(v_ids,'[^,]*'))+1);


 dbms_output.put_line('Updated IDs: ' || v_ids || ' to LIM0178');


  select RTRIM(XMLAGG(XMLELEMENT(E,iplu.limit_template_id,',').EXTRACT('//text()') ORDER BY iplu.limit_template_id).GetClobVal(),',') into v_ids2
  from base_timeline_section bbts,
       base_timeline_org     bts,
       trmt_timeline         tl,
       timeline_update_limit iplu
   where bbts.base_trmt_set_id = bts.base_trmt_set_id
   and tl.limit_id = bts.limit_id
   and bbts.bse_trmt_st_tplt_id = '720'
   and iplu.limit_template_id = tl.limit_template;


   update timeline_update_limit iplu
      set iplu.limit_template_id = 'LIM178'
    where iplu.limit_template_id IN (select REGEXP_SUBSTR (DBMS_LOB.substr(v_ids2,30000), '[^,]+', 1, level) 
                        from (select rownum from dual ) 
                        connect by level <= length(regexp_replace(v_ids2,'[^,]*'))+1);

  dbms_output.put_line('Update table 2 IDs: ' || v_ids2 || ' to LIM0178');


  end;

---

感谢我收到了一个符号选择，当我期待下列之一时，开始函数pragma procedure subtype–@jacques我已经更新了代码，因为之前我将v_id直接传递给update语句，但该语句无法工作。您遇到的错误可能是由于缺少或不正确的括号，请尝试新代码，并让我知道它是否有效。如果我有第二个表需要更新，它似乎无法填充列表，我不确定原因，我得到表1更新的ID:130081306913130134021346713532135971359713662137271379213857139221398714052141418221424714371444214507145721463711470214767148971496215027150921515715222152153521541715482155471612162621652216716782到LIM0178表2更新的ID:LIM0178如果您愿意共享第二个ID:表语句，将尝试查看它的错误。如果以前的解决方案工作正常，您可以使用向上箭头接受答案。感谢幸运的是，当我尝试此操作时，我得到了一个ORA-01422:fetch返回的行数超过了请求的行数，这意味着在正在更新的limit_模板列中有多个值。请单独验证此查询，以便根据需要的记录应用筛选器。或者使用distinct来获取记录。

DECLARE
   the_variable NUMBER;    --- this is varaible declare
declare
    v_ids varchar2(4000); 

   begin

   SELECT limit_template INTO the_variable FROM time_line --- here we are setting its value
   where tl.limit_template IN
       (select tl.limit_template
          from base_timeline_section bbts,
               base_timeline_org     bts,
               trmt_timeline         tl
         where bbts.base_trmt_set_id = bts.base_trmt_set_id
           and tl.limit_id = bts.limit_id
           and bbts.bse_trmt_st_tplt_id = '720')
       returning listagg(tl.limit_template, ',') within group 
                     (order by tl.limit_template) into v_ids;
     dbms_output.put_line('Updated IDs: ' || v_ids || ' to LIM0178');;

   update time_line tl
   set tl.limit_template = 'LIM0178'
    where tl.limit_template IN
       (select tl.limit_template
          from base_timeline_section bbts,
               base_timeline_org     bts,
               trmt_timeline         tl
         where bbts.base_trmt_set_id = bts.base_trmt_set_id
           and tl.limit_id = bts.limit_id
           and bbts.bse_trmt_st_tplt_id = '720')
       returning listagg(tl.limit_template, ',') within group 
                     (order by tl.limit_template) into v_ids;
     dbms_output.put_line('Updated IDs: ' || v_ids || ' to LIM0178');
     end;

   declare
    v_ids  clob; 
    v_ids2 clob;
   begin
    select RTRIM(XMLAGG(XMLELEMENT(E,tl.limit_template,',').EXTRACT('//text()') ORDER BY tl.limit_template).GetClobVal(),',') into v_ids
      from base_timeline_section bbts,
           base_timeline_org     bts,
           trmt_timeline         tl
     where bbts.base_trmt_set_id = bts.base_trmt_set_id
       and tl.limit_id = bts.limit_id
       and bbts.bse_trmt_st_tplt_id = '720';

  update time_line tl
     set tl.limit_template = 'LIM0178'
   where tl.limit_template IN (select REGEXP_SUBSTR (DBMS_LOB.substr(v_ids,30000), '[^,]+', 1, level) 
                               from (select rownum from dual ) 
                            connect by level <= length(regexp_replace(v_ids,'[^,]*'))+1);


 dbms_output.put_line('Updated IDs: ' || v_ids || ' to LIM0178');


  select RTRIM(XMLAGG(XMLELEMENT(E,iplu.limit_template_id,',').EXTRACT('//text()') ORDER BY iplu.limit_template_id).GetClobVal(),',') into v_ids2
  from base_timeline_section bbts,
       base_timeline_org     bts,
       trmt_timeline         tl,
       timeline_update_limit iplu
   where bbts.base_trmt_set_id = bts.base_trmt_set_id
   and tl.limit_id = bts.limit_id
   and bbts.bse_trmt_st_tplt_id = '720'
   and iplu.limit_template_id = tl.limit_template;


   update timeline_update_limit iplu
      set iplu.limit_template_id = 'LIM178'
    where iplu.limit_template_id IN (select REGEXP_SUBSTR (DBMS_LOB.substr(v_ids2,30000), '[^,]+', 1, level) 
                        from (select rownum from dual ) 
                        connect by level <= length(regexp_replace(v_ids2,'[^,]*'))+1);

  dbms_output.put_line('Update table 2 IDs: ' || v_ids2 || ' to LIM0178');


  end;