设置Microsoft SQL Server全文索引服务
在Microsoft SQL Server 7.0 中提供了全文索引服务(Full-Text Search Service)，在
查询性能上，对varchar,char,text类型的字段的匹配查询比用Sql 语句使用Like操作符及匹
配符的速度快10倍以上；在查询匹配上，提供了模糊匹配的高级搜索性能并能够返回查询的命
中率。 Full Text Search Service包含在Sql Server 7.0中，在Sql Server 7 Destop版中
不起作用。安装Sql server时，无法缺省安装它，需要在Custom Installation 中选择。 服
务安装完后在Sql Server EnterPrise Manager中的Support Services中显示为Full-text
Search,在控制面版中的服务中显示为Microsoft Search.可以在Sql Server EnterPrise
Manager中启动这个服务，就可以在表中加入全文索引了。 要注意：只有有唯一索引栏的表
才能建立全文索引，并且全文索引建立好之后就不能改变表了，如要改变表就必须得取出索引
对表设置全文索引应用如下步骤： 1.选择要建立全文索引的表，然后选择： Full-Text Index Table ->Define Full-Text Indexing on a table
2.系统会启动Sql Server Full-Text Index 向导。
3.选择一个唯一索引。
4.选择一个要建立索引的字段。
5.选择catalog.
6.选择更新索引计划（由于全文索引和普通索引表不同，不能自动更新，所以得加入一个
7.Finish
8.选择在数据库Full-text catalogs中里的新建立的catalog，然后运行Start
Population,Full Population 就可以了
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