在顶部获取匹配数据答案

【问题标题】：Get Match Data On top在顶部获取匹配数据
【发布时间】：2014-06-27 06:52:19
【问题描述】：

我在不同的列上有多个类似的运算符，如下所示：

SELECT d.ID ,d.DealerCode,d.AffiliationCode,d.LegalName,d.ShipperCode,d.PrimaryUserId,d.PrimaryContactId,              
       FROM Dealer AS d              
       LEFT JOIN Country c on c.Id=d.CountryId              
       LEFT JOIN [User] u on u.Id=d.PrimaryUserId              
       LEFT JOIN RegistrationSource rs on rs.Id=d.RegistrationSourceId              
       WHERE d.TenantId='4c0a42de-6ce5-4faa-8b5d-da4d7c3294b4' AND 
       (
        u.UserName LIKE '%AQ%' 
        OR d.DealerCode LIKE '%AQ%' 
        OR d.LegalName LIKE '%AQ%' 
        OR d.ShipperCode LIKE '%AQ%'
       ) 
       ORDER BY d.DealerCode ASC

是否有可能首先（在顶部）找到与这些列值中的任何一个具有完全匹配值的行集

【问题讨论】：

替换LIKE '%AQ%' 上的= 'AQ'?

标签： sql sql-server stored-procedures

【解决方案1】：

尝试一个 UNION - 它应该允许您一个接一个地列出两组数据（未经测试）：

SELECT d.ID 
       ,d.DealerCode,d.AffiliationCode,d.LegalName, ...
   FROM Dealer AS d              
   LEFT JOIN Country c on c.Id=d.CountryId              
   LEFT JOIN [User] u on u.Id=d.PrimaryUserId              
   LEFT JOIN RegistrationSource rs on rs.Id=d.RegistrationSourceId              
   WHERE d.TenantId='4c0a42de-6ce5-4faa-8b5d-da4d7c3294b4' AND 
   (
    u.UserName = 'AQ' 
    OR d.DealerCode = 'AQ' 
    OR d.LegalName = 'AQ' 
    OR d.ShipperCode = 'AQ'
   ) 
UNION
   SELECT d.ID , d.DealerCode,d.AffiliationCode, ...
   FROM Dealer AS d              
   LEFT JOIN Country c on c.Id=d.CountryId              
   LEFT JOIN [User] u on u.Id=d.PrimaryUserId              
   LEFT JOIN RegistrationSource rs on rs.Id=d.RegistrationSourceId              
   WHERE d.TenantId='4c0a42de-6ce5-4faa-8b5d-da4d7c3294b4' AND 
   (
    u.UserName LIKE '%AQ%' 
    OR d.DealerCode LIKE '%AQ%' 
    OR d.LegalName LIKE '%AQ%' 
    OR d.ShipperCode LIKE '%AQ%'
   ) 
   ORDER BY d.DealerCode ASC

如果有多个“第一个”，您可能需要限制使用 TOP 1

【讨论】：

【解决方案2】：

您可以使用ORDER BY 使完全匹配的行显示在顶部，例如：

......
......
ORDER BY
    (CASE WHEN 
        u.UserName = 'AQ' 
        OR d.DealerCode = 'AQ' 
        OR d.LegalName = 'AQ' 
        OR d.ShipperCode = 'AQ'
    THEN 0
    ELSE 1
    END), d.DealerCode

相关问题：MySQL order by "best match"

【讨论】：

【解决方案3】：

声明@OrderByFeild VarChar(25)
声明@OrderByOrder VarChar(5)

SELECT @OrderByFeild = SUBSTRING(@OrderBy, 1, CHARINDEX(' ', @OrderBy) - 1),
@OrderByOrder = SUBSTRING(@OrderBy, CHARINDEX(' ', @OrderBy) + 1, LEN(@OrderBy))

如果 @OrderByFeild = 'DealerCode' 和 @OrderByOrder = 'ASC' 开始

--Your Select Statement Here..
    ORDER BY CASE 
     WHEN d.DealerCode LIKE ''+@SearchQuery+''  THEN 5 
     WHEN d.DealerCode LIKE '%'+@SearchQuery+'%' THEN 4 
     WHEN u.UserName LIKE '%'+@SearchQuery+'%' THEN 3 
     WHEN d.LegalName LIKE '%'+@SearchQuery+'%' THEN 2
     WHEN d.ShipperCode LIKE '%'+@SearchQuery+'%' THEN 1   END
END

ELSE IF @OrderByFeild = 'DealerCode' 开始

--Your Select Statement Here..
    ORDER BY CASE 
     WHEN d.DealerCode LIKE ''+@SearchQuery+''  THEN 1 
     WHEN d.DealerCode LIKE '%'+@SearchQuery+'%' THEN 2 
     WHEN u.UserName LIKE '%'+@SearchQuery+'%' THEN 3 
     WHEN d.LegalName LIKE '%'+@SearchQuery+'%' THEN 4
     WHEN d.ShipperCode LIKE '%'+@SearchQuery+'%' THEN 5   END

END

否则开始

    --Your Select Statement Here..
    -- ANY Other sorting you need to do
END

【讨论】：