在SQL Server中使用全文本搜索来搜索字符串的中间部分

Question

我无法使用全文搜索索引来搜索字符串的中间部分，例如：：有一个字符串“我喜欢音乐”，我无法搜索类似的字符串中间部分。

Answer 1

Try LIKE operator.

SELECT 
    * 
FROM 
    YourTABLE 
WHERE 
    ColumnName LIKE '%like%'

Answer 2

Use Like keyword in query as follows:

select * from tablename where col like '%like%'

Here is the tutorial of like in sql:

http://www.w3schools.com/sql/sql_like.asp

Here is the MSDN:

http://msdn.microsoft.com/en-us/library/ms179859.aspx

Hope its helpful.

Answer 3

Well, in order to still use the fulltext index and to avoid a table scan, try this

 select * 
   from yourTable
  where contains (ColumnName,'like')
    and (ColumnName not like 'like%' or ColumnName like '_%like%')

However, the query optimizer might decide that a full table scan is more effective.

Answer 4

Check if statistics of your table out of date, especially check the statistics relates to your fulltext index. Since you are using SQl Server 2008, so, you can query DMV to get statistics information of your index or using DBCC to see the statistics detail information

DBCC SHOW_STATISTICS ("[schema].[table]",indexname);

Check the first return result, [Updated], [rows], [rows sampled], if the statistics out of date, or [rows sampled] far less than [rows], which many cause SQL Engine decided to use table scan instead of using your index.