Question

我遇到错误ORACLE：ORA-00904：无效的标识符：

and l.cd_pergunta = e.cd_pergunta

无效标识符为'e'，cd_pergunta的前缀......

当我执行此查询时：

select count(*)
  from TEACEITE e
 inner join TEREGETA re on re.cd_etapa = e.cd_etapa
                       and re.id_reg_neg = 1.00000000
 where e.obrigatorio = 1
   and not exists
 (select 1
          from GESESSAO s
         inner join GERESPOS r on r.sessao = s.sessao_resp
                              and r.resposta_log = 1
         inner join GEEPE l on l.cd_quest = s.cd_quest
                           and l.ord_perg = r.ord_pergunta
                           and l.cd_pergunta = e.cd_pergunta
         where s.cd_quest = e.cd_quest
           and s.item = e.cd_etapa
           and s.origem = 'GC'
           and s.os_nf_orc_cont = 1.00000000)

有什么想法吗？

Answer 1

问题是别名e在嵌套选择中不可用，因此“无效标识符”。您可以尝试重写查询，以便条件s.cd_quest = e.cd_quest and s.item = e.cd_etapa是主选择的一部分而不是嵌套选择。

编辑：我尝试了几个场景，问题是在嵌套查询的连接解析期间别名e不可用。看起来你不能在内部查询的连接条件中引用外部表别名。

我相信以下内容可行

  select count(*)
  from TEACEITE e
 inner join TEREGETA re on re.cd_etapa = e.cd_etapa
                       and re.id_reg_neg = 1.00000000
 where e.obrigatorio = 1
   and not exists
 (select 1
          from GESESSAO s
         inner join GERESPOS r on r.sessao = s.sessao_resp
                              and r.resposta_log = 1
         inner join GEEPE l on l.cd_quest = s.cd_quest
                           and l.ord_perg = r.ord_pergunta
         where l.cd_pergunta = e.cd_pergunta
           and s.cd_quest = e.cd_quest
           and s.item = e.cd_etapa
           and s.origem = 'GC'
           and s.os_nf_orc_cont = 1.00000000)

虽然这个查询可能有效，但我不确定它是否能完成您的需求，请确保您的业务逻辑也得到了解决。

Answer 2

正如Raam所说，你不能在子查询的连接中使用别名e 您也可以尝试不使用sql1999语法进行连接：

select count(*)
  from TEACEITE e
 inner join TEREGETA re on re.cd_etapa = e.cd_etapa
                       and re.id_reg_neg = 1.00000000
 where e.obrigatorio = 1
   and not exists
 (select 1
    from GESESSAO s, GERESPOS r , GEEPE l 
   where r.sessao = s.sessao_resp
     and r.resposta_log = 1
     and l.cd_quest = s.cd_quest
     and l.ord_perg = r.ord_pergunta
     and l.cd_pergunta = e.cd_pergunta
     and s.cd_quest = e.cd_quest
     and s.item = e.cd_etapa
     and s.origem = 'GC'
     and s.os_nf_orc_cont = 1.00000000)

oracle内部联接上的标识符无效

2 个答案: