Question

我的要求：如果'name'和'address'不为null，那么请考虑两者的值。如果其中一个为空，但是给出了其他的，只需“搜索”给定的。

SELECT * from myTable where (1=1) AND (@p_ID is null or [Id] = @p_ID)
AND
    case
    when [Name] IN (SELECT keyValue FROM @p_PersonalData)
        then 
                ((SELECT COUNT(*) AS lines FROM @p_PersonalData) = 0 
                OR ([Address] IN (SELECT dictKey FROM @p_PersonalData))
                AND ([Name] IN (SELECT keyValue FROM p_PersonalData)))
        else
                ((SELECT COUNT(*) AS lines FROM @p_PersonalData) = 0 
                OR ([Address] IN (SELECT dictKey FROM p_PersonalData))
ORDER BY [...]

info：没有案例，它完美无缺。选择语句和和/或完全没问题

问题是，sql server管理工作室在'= 0'处强调等号，并表示他期望AND或THEN，但是有一个'那么'......

Answer 1

你有＆＃34;然后/其他＆＃34;块。这样的事情：

else
                ((SELECT COUNT(*) AS lines FROM @p_PersonalData) = 0 
                OR ([Address] IN (SELECT dictKey FROM p_PersonalData))

是无效的语法。

试试这个。请注意，WHERE子句中的情况可能非常低效，您应该考虑以更实质的方式重构此查询。但这应该让你开始：

SELECT *
from myTable
where (1=1)
  AND (@p_ID is null or [Id] = @p_ID)
  AND case when [Name] IN (SELECT keyValue FROM @p_PersonalData)
           then case when (
                           (SELECT COUNT(*) AS lines FROM @p_PersonalData) = 0 
                           OR
                           ([Address] IN (SELECT dictKey FROM @p_PersonalData))
                           AND
                           ([Name] IN (SELECT keyValue FROM p_PersonalData))
                          )
                      then 1
                      else 0
                end
           else case when (
                           (SELECT COUNT(*) AS lines FROM @p_PersonalData) = 0  OR ([Address] IN (SELECT dictKey FROM p_PersonalData)
                          )
                     then 1
                     else 0
                end
      end = 1
ORDER BY [...]

那么在我的where子句中的情况有什么问题？

1 个答案: