Oracle 测试语句

一、简单测试

declare l_card_id number;
        v_result  varchar2(1000);
begin 
   select t.card_id into l_card_id from (
          select t.rowid from sup_card t 
          where t.card_id = 41
          order by t.card_No desc,t.up_load_date asc
          ) R 
    inner Join sup_card t on R.Rowid = t.rowid 
          where rownum < 2;
    
    if (l_card_id is null) then
       v_result := 'It is null';
    elsif (l_card_id = 0) then 
       v_result := 'Zero';
    else
       v_result := l_card_id;
    end if;
    
    dbms_output.put_line(v_result); 
end;

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