SQL 服务器 FREETEXTTABLE 未返回结果

Question

我使用 SQL 服务器 FREETEXTTABLE 功能在 table 列中搜索，基于用户输入的词，如搜索引擎和 return 最佳匹配行。

Table 列将包含许多问题，用户将在文本框中输入内容（以任何顺序），根据他输入的内容，我需要自动填充搜索页面。

我用了FREETEXTTABLE。但它在某些情况下不起作用。

如果我输入 'what' 它不会 return 任何东西。

DECLARE @query VARCHAR(50) = 'what'

SELECT TOP 10 Questions
FROM tblQuestion tq 
INNER JOIN FREETEXTTABLE(tblQuestion, Questions, @query) ft ON (tq.ID = ft.[Key])
ORDER BY ft.Rank DESC

但是如果我输入 'what is' 它 return 是 10 条记录。

DECLARE @query VARCHAR(50) = 'what is'

SELECT TOP 10 Questions
FROM tblQuestion tq 
INNER JOIN FREETEXTTABLE(tblQuestion, Questions, @query) ft ON (tq.ID = ft.[Key])
ORDER BY ft.Rank DESC

我也试过CONTAINS和FREETEXT。

SELECT * 
FROM tblQuestion 
WHERE FREETEXT (Questions, 'what')

甚至这个查询 return 零行。

但是下面的查询 returned 几行。

SELECT * 
FROM tblQuestion  
WHERE FREETEXT (Questions, 'what is')

Answer 1

您可能是stop lists的受害者。使用以下查询确保所有单词都包含在索引中：

SELECT * FROM sys.dm_fts_index_keywords(DB_ID('YourDB'), OBJECT_ID('tblQuestion'))

注意：

A stopword can be a word with meaning in a specific language, or it can be a token that does not have linguistic meaning. For example, in the English language, words such as "a," "and," "is," and "the" are left out of the full-text index since they are known to be useless to a search.

如果您想包括所有单词，即使是标记为无用的单词，请使用以下代码：

ALTER FULLTEXT INDEX ON tblQuestion SET STOPLIST = OFF

SQL 服务器 FREETEXTTABLE 未返回结果

SQL Server FREETEXTTABLE not returning result

sql

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containstable