sql-server - TSQL - 使用全文 CONTAINS 的连接

Question

我目前有以下选择语句，但我希望转到“关键字”列上的全文搜索。我将如何重写它以使用 CONTAINS？

SELECT MediaID, 50 AS Weighting
FROM Media m JOIN @words w ON m.Keywords LIKE '%' + w.Word + '%'

@words 是一个表变量，里面填满了我要查找的词:

DECLARE @words TABLE(Word NVARCHAR(512) NOT NULL);

Answer 1

如果您不反对使用临时表和 EXEC(我意识到这是一个很大的假设)，您可以执行以下操作:

DECLARE @KeywordList VARCHAR(MAX), @KeywordQuery VARCHAR(MAX)
SELECT @KeywordList = STUFF ((
        SELECT '"' + Keyword + '" OR '
        FROM FTS_Keywords
        FOR XML PATH('')
    ), 1, 0, '')

SELECT  @KeywordList = SUBSTRING(@KeywordList, 0, LEN(@KeywordList) - 2)
SELECT  @KeywordQuery = 'SELECT RecordID, Document FROM FTS_Demo_2 WHERE CONTAINS(Document, ''' + @KeywordList +''')'

--SELECT @KeywordList, @KeywordQuery

CREATE TABLE #Results (RecordID INT, Document NVARCHAR(MAX))

INSERT INTO #Results (RecordID, Document)
EXEC(@KeywordQuery)

SELECT * FROM #Results

DROP TABLE #Results

这将生成如下查询:

SELECT   RecordID
        ,Document 
FROM    FTS_Demo_2 
WHERE CONTAINS(Document, '"red" OR "green" OR "blue"')

结果是这样的:

RecordID    Document
1   one two blue
2   three red five