Question

以下是用Oracle 11g编写的脚本：

 MERGE INTO tblbio t
      USING (SELECT e.id, tblduplicate.cpid, e.bdt,e.LN, e.FN               
          FROM tblduplicate, entities where
          trim(e.id) = trim(tblduplicate.id)) source
      ON (t.cpid = source.cpid and trim(t.bdt) = trim(source.bdt))
WHEN MATCHED
THEN
UPDATE SET t.id = source.id, t.stat = '4'
WHERE  t.cmp = 'HHCC'
  AND t.thn = '2013'
  AND trim(lower(source.LN)) = trim(lower(t.LN))
  AND trim(lower(source.FN)) = trim(lower(t.FN))
  AND nvl(trim(t.bdt), ' ') <> ' '
  AND t.bdt <> '00000000'
  AND nvl(trim(source.bdt), ' ') <> ' '
  and source.bdt <> '00000000'
  AND t.stat <> '4'

由于我的数据完整性问题，此脚本偶尔会生成1条以上的记录。其中此脚本将生成错误。我想在运行此脚本之前创建验证。当我的验证生成多个记录时，我会停止运行此脚本。我怎么能这样做？

我尝试编写以下内容进行验证以捕获记录计数，但Oracle只是不喜欢它。

 select* from tblbio t <-----
      USING (SELECT e.id, tblduplicate.cpid, e.bdt,e.LN, e.FN               
          FROM tblduplicate, entities where
          trim(e.id) = trim(tblduplicate.id)) source
      ON (t.cpid = source.cpid and trim(t.bdt) = trim(source.bdt))
WHEN MATCHED
THEN
select * from tblbio t <-----
WHERE  t.cmp = 'HHCC'
  AND t.thn = '2013'
  AND trim(lower(source.LN)) = trim(lower(t.LN))
  AND trim(lower(source.FN)) = trim(lower(t.FN))
  AND nvl(trim(t.bdt), ' ') <> ' '
  AND t.bdt <> '00000000'
  AND nvl(trim(source.bdt), ' ') <> ' '
  and source.bdt <> '00000000'
  AND t.stat <> '4'

Answer 1

将原始MERGE查询转换为从tbiblio中选择：

MERGE INTO ... USING - ＆gt; select from ... join
WHEN MATCHED THEN UPDATE SET ... WHERE - ＆gt; WHERE

最终查询：

select * from tblbio t 
      JOIN (SELECT e.id, tblduplicate.cpid, e.bdt,e.LN, e.FN               
          FROM tblduplicate, entities where
          trim(e.id) = trim(tblduplicate.id)) source
      ON (t.cpid = source.cpid and trim(t.bdt) = trim(source.bdt))
WHERE  t.cmp = 'HHCC'
  AND t.thn = '2013'
  AND trim(lower(source.LN)) = trim(lower(t.LN))
  AND trim(lower(source.FN)) = trim(lower(t.FN))
  AND nvl(trim(t.bdt), ' ') <> ' '
  AND t.bdt <> '00000000'
  AND nvl(trim(source.bdt), ' ') <> ' '
  and source.bdt <> '00000000'
  AND t.stat <> '4'

如何在Oracle 11g中测试以下SQL脚本

1 个答案: