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利用MySQL内置函数实现全文搜索功能

 2009-02-26 11:18:40 来源:WEB开发网   
核心提示:MATCH (col1,col2,...) AGAINST (expr [IN BOOLEAN MODE | WITH QUERY EXPANSION])MySQL支持全文索引和搜索功能,MySQL中的全文索引类型FULLTEXT的索引,利用MySQL内置函数实现全文搜索功能, FULLTEXT 索引仅可用于 MyIS

MATCH (col1,col2,...) AGAINST (expr [IN BOOLEAN MODE | WITH QUERY EXPANSION])

MySQL支持全文索引和搜索功能。MySQL中的全文索引类型FULLTEXT的索引。  FULLTEXT 索引仅可用于 MyISAM 表;他们可以从CHAR、VARCHAR或TEXT列中作为CREATE TABLE语句的一部分被创建,或是随后使用ALTER TABLE 或 CREATE INDEX被添加。对于较大的数据集,将你的资料输入一个没有FULLTEXT索引的表中,然后创建索引,其速度比把资料输入现有FULLTEXT索引的速度更为快。

全文搜索同MATCH()函数一起执行。

mysql> CREATE TABLE articles (
  ->  id INT UNSIGNED AUTO_INCREMENT NOT NULL PRIMARY KEY,
  ->  title VARCHAR(200),
  ->  body TEXT,
  ->  FULLTEXT (title,body)
  -> );
Query OK, 0 rows affected (0.00 sec)
 
mysql> INSERT INTO articles (title,body) VALUES
  -> ('MySQL Tutorial','DBMS stands for DataBase ...'),
  -> ('How To Use MySQL Well','After you went through a ...'),
  -> ('Optimizing MySQL','In this tutorial we will show ...'),
  -> ('1001 MySQL Tricks','1. Never run mysqld as root. 2. ...'),
  -> ('MySQL vs. YourSQL','In the following database comparison ...'),
  -> ('MySQL Security','When configured properly, MySQL ...');
Query OK, 6 rows affected (0.00 sec)
Records: 6 Duplicates: 0 Warnings: 0
 
mysql> SELECT * FROM articles
  -> WHERE MATCH (title,body) AGAINST ('database');
+----+-------------------+------------------------------------------+
| id | title       | body                   |
+----+-------------------+------------------------------------------+
| 5 | MySQL vs. YourSQL | In the following database comparison ... |
| 1 | MySQL Tutorial  | DBMS stands for DataBase ...       |
+----+-------------------+------------------------------------------+
2 rows in set (0.00 sec)

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Tags:利用 MySQL 内置

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