Sql server 如何使用通配符参数和其他参数筛选数据？

但我很难让它与@IsMatch参数一起工作：

ALTER PROCEDURE MyProcName 
    @IsMatch varchar(50)
AS
    SELECT
        IMS_PolicyNumber, Rater_PolicyNumber
    FROM
        tblPolicies 
    WHERE
        (@IsMatch = 'No Match' AND Rater_PolicyNumber <> IMS_PolicyNumber OR Rater_PolicyNumber IS NULL) -- returns No Match records
        OR (@IsMatch = 'Match' AND Rater_PolicyNumber = IMS_PolicyNumber) --Returns Matching Records
        OR (@IsMatch = 'Both') --Returns both: matching and no matching records 

如果我在@Rater_PolicyNumber中传递值，下面的方法会起作用，但如果我将其留空，它将返回所有记录，而不仅仅是不匹配的记录

AND @Rater_PolicyNumber LIKE COALESCE('%'+ @Rater_PolicyNumber+'%','') 

如何返回“不匹配”、“匹配”和“两者”记录，并仅在用户输入时按@Rater_PolicyNumber值对其进行筛选

---

谢谢

使用多个and和or可能会很棘手。我已经应用了一些格式，并在部分周围添加了括号，以返回最初返回的记录，但是如果@Rater_PolicyNumber不为null，它也会应用类似的方法

你能试试这个吗

select IMS_PolicyNumber
  , Rater_PolicyNumber
from tblPolicies 
where (
       Rater_PolicyNumber like '%'+ @Rater_PolicyNumber+'%'
       or Rater_PolicyNumber is null
       or @Rater_PolicyNumber is null 
      )
  and (
        (@IsMatch = 'No Match' 
         and (Rater_PolicyNumber<>IMS_PolicyNumber 
              or Rater_PolicyNumber is null) 
          )
      -- returns No Match records
       or (@IsMatch= 'Match' and Rater_PolicyNumber=IMS_PolicyNumber) 
      -- Returns Matching Records
       or (@IsMatch = 'Both') 
      --Returns both: matching and no matching records 
      )

---

谢谢它可以工作，但如果Rater_PolicyNumber=NULL，它不会返回NULL值，我也需要这些值。你认为有可能吗？@Oleg更新为包括或Rater_PolicyNumber在第一组标准中为空非常感谢！工作完美！抱歉耽搁了@奥列格很乐意帮忙！

select IMS_PolicyNumber
  , Rater_PolicyNumber
from tblPolicies 
where (
       Rater_PolicyNumber like '%'+ @Rater_PolicyNumber+'%'
       or Rater_PolicyNumber is null
       or @Rater_PolicyNumber is null 
      )
  and (
        (@IsMatch = 'No Match' 
         and (Rater_PolicyNumber<>IMS_PolicyNumber 
              or Rater_PolicyNumber is null) 
          )
      -- returns No Match records
       or (@IsMatch= 'Match' and Rater_PolicyNumber=IMS_PolicyNumber) 
      -- Returns Matching Records
       or (@IsMatch = 'Both') 
      --Returns both: matching and no matching records 
      )

        SELECT
            IMS_PolicyNumber, Rater_PolicyNumber
        FROM
            tblPolicies 
        WHERE CHARINDEX(@IsMatch,CASE WHEN  Rater_PolicyNumber = IMS_PolicyNumber THEN 'Match,Both' ELSE 'No MATCH,Both' END)>0