bitsCN.com
由于工作需要,需要对上传的文件内容进行查询。通过MSDN了解到Windows索引服务可以实现对文件的全文检索,并可以通过SQL Server进行查询。本文将两者结合后实现对上传文件的全文检索。
方案描述:
1.改变文件存储时的文件名
2.配置索引服务器,并将索引服务器与MS SQL Server关联。
3.修改SQL语句,将进行全文查询语句的内容加入查询条件中
文件的存储方式:
为了方便存储以及方便索引,我们将上传的文件存储到一个目录里面,为了保证上传的文件名不重复,采用GUID作为文件名,并且通过这个GUID于数据库记录相关联。同时,文件的后缀还保持原始文件的后缀,让索引服务能够识别该文档。
配置索引服务
进入计算机管理(Computer Management)程序(右键”我的电脑”->”管理”),并找到索引服务(Index Service)
配置索引服务的功能
(1)右键选择索引服务弹出一个菜单
(2)选择New->Catalog(新建一个编录)
设置新增加的编录
(1)输入编录的名字(这个名字需要与数据库进行关联,要注意命名,这里假设DCSII
(2)点Browse进入选择索引服务运行目录窗体
(3)选择前面创建的索引运行目录(任意地方)
(4)点确定完成本次操作
在编录创建号以后,需要给编录增加目录
(1)右键选择刚刚创建的编录
(2)选择New->Directory(新建目录)
新建索引目录
(1)点击Browse进入目录选择页面
(2)选择要进行全文检索文件的目录
(3)确定完成本次操作
完成创建后启动索引服务
(1)启动索引服务
(2)索引服务启动成功后索引编录的信息,可以看到编录信息就表示服务已经启动成功。
将索引服务和SQL数据库关联:
在SQL 查询分析器(SQL Query Analyer)里执行下面的存储过程
EXEC sp_addlinkedserver Dcs, -- 连接服务器的名字,到后面查询的时候要用到
'Index Server',
'MSIDXS',
'DCSII' -- 索引服务里新建的编录名字
索引服务的性能调整方法1
(1)右键选择索引服务
(2)选择 All Tasks-> Tune Perrformance
(3)选择用户自定义
(4)点击Customize进入性能调整窗体
(5)将Index和Querying的属性移动到最右边
(6)点确定完成操作
性能调整方法2
如果服务器不需要对整个系统的文件进行索引,可以停止或者删除System编录。
MS SQL对索引服务器的调用
1.通过sql语句查询连接服务器的内容
SELECT Q.*
FROM OpenQuery(dcs, --连接服务器名字
'SELECT FileName, Size, DocAuthor, path --在连接服务器里的sql语句
FROM SCOPE()
WHERE CONTAINS(''番号 and abc'') '
) AS Q
2.因为SQL语句不支持动态输入的字符串,因此查询字符串只好在C#代码里来进行拼接
其它解决方法:
在SQL Server 2000数据库里按全文搜索功能,用image字段存储文件内容,并新增一个字段存放文件类型,然后在通过企业管理器新建全文索引项的时候将这两个字段匹
bitsCN.com

To optimize MySQL slow query, slowquerylog and performance_schema need to be used: 1. Enable slowquerylog and set thresholds to record slow query; 2. Use performance_schema to analyze query execution details, find out performance bottlenecks and optimize.

MySQL and SQL are essential skills for developers. 1.MySQL is an open source relational database management system, and SQL is the standard language used to manage and operate databases. 2.MySQL supports multiple storage engines through efficient data storage and retrieval functions, and SQL completes complex data operations through simple statements. 3. Examples of usage include basic queries and advanced queries, such as filtering and sorting by condition. 4. Common errors include syntax errors and performance issues, which can be optimized by checking SQL statements and using EXPLAIN commands. 5. Performance optimization techniques include using indexes, avoiding full table scanning, optimizing JOIN operations and improving code readability.

MySQL asynchronous master-slave replication enables data synchronization through binlog, improving read performance and high availability. 1) The master server record changes to binlog; 2) The slave server reads binlog through I/O threads; 3) The server SQL thread applies binlog to synchronize data.

MySQL is an open source relational database management system. 1) Create database and tables: Use the CREATEDATABASE and CREATETABLE commands. 2) Basic operations: INSERT, UPDATE, DELETE and SELECT. 3) Advanced operations: JOIN, subquery and transaction processing. 4) Debugging skills: Check syntax, data type and permissions. 5) Optimization suggestions: Use indexes, avoid SELECT* and use transactions.

The installation and basic operations of MySQL include: 1. Download and install MySQL, set the root user password; 2. Use SQL commands to create databases and tables, such as CREATEDATABASE and CREATETABLE; 3. Execute CRUD operations, use INSERT, SELECT, UPDATE, DELETE commands; 4. Create indexes and stored procedures to optimize performance and implement complex logic. With these steps, you can build and manage MySQL databases from scratch.

InnoDBBufferPool improves the performance of MySQL databases by loading data and index pages into memory. 1) The data page is loaded into the BufferPool to reduce disk I/O. 2) Dirty pages are marked and refreshed to disk regularly. 3) LRU algorithm management data page elimination. 4) The read-out mechanism loads the possible data pages in advance.

MySQL is suitable for beginners because it is simple to install, powerful and easy to manage data. 1. Simple installation and configuration, suitable for a variety of operating systems. 2. Support basic operations such as creating databases and tables, inserting, querying, updating and deleting data. 3. Provide advanced functions such as JOIN operations and subqueries. 4. Performance can be improved through indexing, query optimization and table partitioning. 5. Support backup, recovery and security measures to ensure data security and consistency.

Full table scanning may be faster in MySQL than using indexes. Specific cases include: 1) the data volume is small; 2) when the query returns a large amount of data; 3) when the index column is not highly selective; 4) when the complex query. By analyzing query plans, optimizing indexes, avoiding over-index and regularly maintaining tables, you can make the best choices in practical applications.


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

Dreamweaver CS6
Visual web development tools

DVWA
Damn Vulnerable Web App (DVWA) is a PHP/MySQL web application that is very vulnerable. Its main goals are to be an aid for security professionals to test their skills and tools in a legal environment, to help web developers better understand the process of securing web applications, and to help teachers/students teach/learn in a classroom environment Web application security. The goal of DVWA is to practice some of the most common web vulnerabilities through a simple and straightforward interface, with varying degrees of difficulty. Please note that this software

SAP NetWeaver Server Adapter for Eclipse
Integrate Eclipse with SAP NetWeaver application server.

Zend Studio 13.0.1
Powerful PHP integrated development environment

ZendStudio 13.5.1 Mac
Powerful PHP integrated development environment