在库TEST上建立全文索引

/*
在库TEST上建立全文索引
*/
use test
create table poofly(id int not null, name varchar(10))
go
/* 首先创建一个唯一索引，以便全文索引利用*/
create unique clustered  index un_ky1 on poofly(id)
/*创建全文目录*/
create FULLTEXT CATALOG FT1 AS DEFAULT
/*C创建全文索引*/
create FULLTEXT INDEX ON poofly(NAME) key index un_ky1 ON  FT1
/*修改全文目录*/
alter FULLTEXT CATALOG FT1  REBUILD
/*删除全文目录FT(含有全文索引时候不能删除)*/
drop fulltext catalog ft
/*查看数据库所有的全文目录*/
select* from sys.fulltext_catalogs
/*
fulltext_catalog_id name                                                                                                                             path                                                                                                                                                                                                                                                             is_default is_accent_sensitivity_on data_space_id file_id     principal_id is_importing
------------------- -------------------------------------------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- ---------- ------------------------ ------------- ----------- ------------ ------------
5                   test                                                                                                                             NULL                                                                                                                                                                                                                                                             0          1                        NULL          NULL        1            0
11                  FT1                                                                                                                              NULL                                                                                                                                                                                                                                                             1          1                        NULL          NULL        1            0
*/
/* 查看所有用到全文索引的表*/
exec sp_help_fulltext_tables
/*
TABLE_OWNER                                                                                                                      TABLE_NAME                                                                                                                       FULLTEXT_KEY_INDEX_NAME                                                                                                          FULLTEXT_KEY_COLID FULLTEXT_INDEX_ACTIVE FULLTEXT_CATALOG_NAME
-------------------------------------------------------------------------------------------------------------------------------- -------------------------------------------------------------------------------------------------------------------------------- -------------------------------------------------------------------------------------------------------------------------------- ------------------ --------------------- --------------------------------------------------------------------------------------------------------------------------------
dbo                                                                                                                              poofly                                                                                                                           un_ky1                                                                                                                           1                  1                     FT1
*/
/*
在库TEST上建立全文索引
*/
use test
create table poofly(id int not null, name varchar(10))
go
/* 首先创建一个唯一索引，以便全文索引利用*/
create unique clustered  index un_ky1 on poofly(id)
/*创建全文目录*/
create FULLTEXT CATALOG FT1 AS DEFAULT
/*C创建全文索引*/
create FULLTEXT INDEX ON poofly(NAME) key index un_ky1 ON  FT1
/*修改全文目录*/
alter FULLTEXT CATALOG FT1  REBUILD
/*删除全文目录FT(含有全文索引时候不能删除)*/
drop fulltext catalog ft
---------------------------------------------------
--使用contains关键字进行全文索引

--1.前缀搜索
select name from tb where contains(name,'"china*"')
/*--注意这里的* 返回结果会是 chinax chinay chinaname china 
--返回前缀是china的name
--如果不用“”隔开 那么系统会都城 contains(name,'china*') 与china* 匹配*/

--2.使用派生词搜索
select name from tb where contains(name,'formsof(inflectional,"foot")')
/* 出来结果可能是 foot feet (所有动词不同形态 名词单复数形式)*/

--3.词加权搜索
select value from tb where contains(value , 'ISABOUT(performance weight(.8))')
/*全值用0-1的一个数字表示 表示每个词的重要程度*/

--4.临近词搜素
select * from tb where contains(document,'a near b')
/* 出来的结果是“a”单词与“b”单词临近的document
可以写成 contains(document,'a ~ b')
*/
--5.布尔逻辑搜素
select * from tb where contains(name,'"a" and "b"')
/*返回既包含A 又包含 B单词的行
当然 这里的AND 关键字还有换成 OR ,AND NOT 等
*/
--------------------------------------------------
--你还可以使用RREETEXT 进行模糊搜索
--任意输入文本 全文索引自动识别重要单词 然后构造一个查询
use test
go
select * from tb where freetext(wendang,'zhubajie chi xi gua !')