Question

如何查询表商店（ID，Title，Company）获取标题包含“term”的所有记录，显示完全匹配的记录，然后是部分匹配。换句话说，如果我正在寻找“foo”我的魔杖记录显示为

Foo和儿子
good foo
foo bar
足球
Herfooles

继承人我拥有的

Create PROCEDURE [dbo].[SearchUserInfo] 
@query nvarchar(500),
@term nvarchar(500)

(SELECT Title,Company,
1 as match
FROM Stores 
WHERE CONTAINS(Title, @query))

UNION 

(SELECT Title,Company,
0 as match
FROM Stores 
WHERE Title like '%' + @term +'%')

order by match desc

此查询的问题是它返回重复记录。如果我删除0作为匹配tehn我不知道如何排序所以CONTAINS的结果将出现在LIKE的结果之前。

感谢

Answer 1

您可以合并两个结果集，然后使用GROUP BY删除重复项，ORDER BY MAX(match) DESC将CONTAINS返回的组放在首位

;WITH CTE
     AS (SELECT Title,
                Company,
                1 AS match
         FROM   Stores
         WHERE  CONTAINS(Title, @query)
         UNION ALL
         SELECT Title,
                Company,
                0 AS match
         FROM   Stores
         WHERE  Title LIKE '%' + @term + '%')
SELECT Title,
       Company,
FROM   CTE
GROUP  BY Title,
          Company
ORDER  BY MAX(match) DESC

Answer 2

如果您不想使用全文搜索，可以使用单个查询执行此操作：

select title, company,
       (case when MatchType like 'FULL%' then 1 else 0 end) as Match
from (select title, company,
             (case when title like concat(@query, ' %') then 'FULL START'
                   when title like concat('% ', @query) then 'FULL END'
                   when title like concat('% ', @query, ' %') then 'FULL MIDDLE'
                   when title like concat(@query, '%') then 'PARTIAL START'
                   when title like concat('%', @query) then 'PARTIAL END'
                   when title like concat('%', @query, '%') then 'PARTIAL MIDDLE'
                   else 'NONE'
              end) as MatchType
      from Stores
     ) s
where MatchType <> 'NONE'
order by MatchType

对于单词的分隔符而言，这可能无法为您提供所需的灵活性。但是，它确实可以让您更好地控制匹配和最终排序的性质。

订单联盟但保持清晰

2 个答案: