Question

我有以下脚本：

DECLARE @PlanId NVARCHAR(255) = ''
DECLARE @PlanName NVARCHAR(255) = ''
DECLARE @ActionID NVARCHAR(255) = ''
DECLARE @ActionDescription01 NVARCHAR(255) = ''
DECLARE @ActionDescription02 NVARCHAR(255) = ''
DECLARE @ActionDescription03 NVARCHAR(255) = ''
DECLARE @ActionDescription04 NVARCHAR(255) = ''
DECLARE @ActionDescription05 NVARCHAR(255) = ''

select ap.plan_id ,ap.plan_name ,apa.action_id ,apa.action_description
from dbo.ACTION_PLAN ap
LEFT JOIN ACTION_PLAN_LINK AS apl ON apl.PLAN_ID = ap.PLAN_ID 
LEFT JOIN dbo.ACTION_PLAN_ACTION AS apa ON apa.ACTION_ID = apl.ACTION_ID
WHERE
    (ap.PLAN_ID = @PlanId or @PlanId = '')
and (ap.PLAN_NAME = @PlanName or @PlanName = '')
and (apa.ACTION_ID = @ActionID or @ActionID = '')
and ( 
      ( (len(@ActionDescription01)>1 and apa.ACTION_DESCRIPTION like ('%' + @ActionDescription01+ '%') ) )
   or ( (len(@ActionDescription02)>1 and apa.ACTION_DESCRIPTION like ('%' + @ActionDescription02+ '%') ) )
   or ( (len(@ActionDescription03)>1 and apa.ACTION_DESCRIPTION like ('%' + @ActionDescription03+ '%') ) )
   or ( (len(@ActionDescription04)>1 and apa.ACTION_DESCRIPTION like ('%' + @ActionDescription04+ '%') ) )
   or ( (len(@ActionDescription05)>1 and apa.ACTION_DESCRIPTION like ('%' + @ActionDescription05+ '%') ) )
    )

上述脚本在使用操作说明进行搜索时工作正常，但不允许我仅搜索plan_id，plan_name或action_id。我希望能够搜索任何一个或组合的参数。我还想在动作描述where子句中添加我使用or运算符的原因，为每个搜索的动作带来更多结果。例如，我搜索plan_id 100，然后在actiondescription01中输入'inform'，我得到一个结果，然后在actiondescription02参数中输入'order'，我得到3个结果，因为有两个与订单有关，一个与通知相关但它们都是一个plan_id的一部分（如果输入了plan_id）。

我希望这是有道理的，有人可以提供帮助。上面的脚本完全按照我的意愿工作，但由于某种原因，我无法独立搜索PlanId，PlanName或ActionId，但如果我与一个动作描述参数一起搜索，它们就可以工作。

Answer 1

我认为你必须改变这些行

or ( (len(@ActionDescription02)>1 and apa.ACTION_DESCRIPTION like ('%' + @ActionDescription02+ '%') ) )

这样的事情

or (
    len(@ActionDescription02)=0 
    or ( len(@ActionDescription02)>0 
         and apa.ACTION_DESCRIPTION like '%' + @ActionDescription02+ '%' )
   )

Answer 2

您的( )比您需要的更多 and ( (正在杀死它。如果没有或该组中的or为真，那么and为假。

select ap.plan_id ,ap.plan_name ,apa.action_id,  apa.action_description
from dbo.ACTION_PLAN ap
LEFT JOIN ACTION_PLAN_LINK AS apl       ON apl.PLAN_ID   = ap.PLAN_ID 
LEFT JOIN dbo.ACTION_PLAN_ACTION AS apa ON apa.ACTION_ID = apl.ACTION_ID
WHERE (ap.PLAN_ID    = @PlanId   or @PlanId = '')
  and (ap.PLAN_NAME  = @PlanName or @PlanName = '')
  and (apa.ACTION_ID = @ActionID or @ActionID = '')
  and (    ( len(@ActionDescription01) > 1 and apa.ACTION_DESCRIPTION like '%' + @ActionDescription01 + '%' ) 
        or ( len(@ActionDescription02) > 1 and apa.ACTION_DESCRIPTION like '%' + @ActionDescription02 + '%' ) 
        or ( len(@ActionDescription03) > 1 and apa.ACTION_DESCRIPTION like '%' + @ActionDescription03 + '%' ) 
        or ( len(@ActionDescription04) > 1 and apa.ACTION_DESCRIPTION like '%' + @ActionDescription04 + '%' ) 
        or ( len(@ActionDescription05) > 1 and apa.ACTION_DESCRIPTION like '%' + @ActionDescription05 + '%') ) 
      )

修复

and (      ( len(@ActionDescription01) = 0 and len(@ActionDescription02) = 0 ...)
        or ( len(@ActionDescription01) > 1 and apa.ACTION_DESCRIPTION like '%' + @ActionDescription01 + '%' ) 
        or ( len(@ActionDescription02) > 1 and apa.ACTION_DESCRIPTION like '%' + @ActionDescription02 + '%' ) 
        or ( len(@ActionDescription03) > 1 and apa.ACTION_DESCRIPTION like '%' + @ActionDescription03 + '%' ) 
        or ( len(@ActionDescription04) > 1 and apa.ACTION_DESCRIPTION like '%' + @ActionDescription04 + '%' ) 
        or ( len(@ActionDescription05) > 1 and apa.ACTION_DESCRIPTION like '%' + @ActionDescription05 + '%') ) 
      )

参数只能与其他人一起使用，但我希望它们能够独立工作

2 个答案: