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我正在尝试为需要根据某些参数更新某些记录的表编写查询。我有几个嵌套选择和几个嵌套子字符串，我想这是让我难以排除故障的原因。我解决了其中的几个ORA-01427：单行子查询已经返回多行问题，但我似乎找不到这个问题。基本上，该脚本所做的是从一条记录中获取两列，并根据多个不同标准根据包含在不同表中的另一条记录更新它们。以下是我正在使用的当前代码：

UPDATE CMC_SBEL_ELIG_ENT p
SET (p.CSPI_ID, p.SBEL_EFF_DT) =
(SELECT co.new_plan, co.ch_dt
   FROM sbsb_plan_conv co, cmc_sbel_elig_ent p
   WHERE co.ch_dt > p.sbel_eff_dt
     and co.ch_dt < current_date
     AND co.new_plan <> p.CSPI_ID
     AND co.sbsb_ck = p.sbsb_ck
     AND p.cspi_id IN co.OLD_PLAN
     and p.SBEL_ELIG_TYPE IN ('tm','ce','TM','CE')
     )
WHERE (p.cspd_cat IN (
   select unique substr(o.old_plan, 1, 1) 
      from facets_ws.sbsb_plan_conv o
      where 
        substr(o.old_plan, 1, 1) IN (
            select substr(y.new_plan, 1, 1)   
            from sbsb_plan_conv y, cmc_sbel_elig_ent u
            where y.sbsb_ck = u.sbsb_ck
              AND (p.SBEL_ELIG_TYPE IN ('tm','ce','TM','CE'))

              and ((substr(y.new_plan, 1, 1) = 'M'
                and substr(y.new_plan, 1, 1) != 'R'
                and substr(y.new_plan, 1, 1) != 'D') 

                or (substr(y.new_plan, 1, 1) = 'R'
                and substr(y.new_plan, 1, 1) != 'M'
                and substr(y.new_plan, 1, 1) != 'D')

                or (substr(y.new_plan, 1, 1) = 'D'
                and substr(y.new_plan, 1, 1) != 'R'
                and substr(y.new_plan, 1, 1) != 'M'))

            and o.sbsb_ck = p.sbsb_ck)
      )
  );

现在，当我对两个 select 语句运行单个查询时，它们都返回明确的唯一值。所以我相当肯定他们不是问题。

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1 回答 1

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尝试执行以下查询：-

SELECT count(co.new_plan)
  FROM sbsb_plan_conv co, cmc_sbel_elig_ent p
WHERE co.ch_dt > p.sbel_eff_dt
 and co.ch_dt < current_date
 AND co.new_plan <> p.CSPI_ID
 AND co.sbsb_ck = p.sbsb_ck
 AND p.cspi_id IN co.OLD_PLAN
 and p.SBEL_ELIG_TYPE IN ('tm','ce','TM','CE')
 group by co.new_plan;

如果上面返回多于一行或返回的计数多于一，那么您可能需要更改查询以执行 DISTINCT / MIN / 使用 ROWNUM 或其他一些技术。

于 2012-12-28T02:50:24.353 回答