如果您数据库系统安装在系统盘(比如C盘)，由于C盘容易受病毒侵害，您也许希望您的数据存放在非系统盘(比如D盘)，要做的这点很简单，您并不需要重装数据库，只要把数据分离，然后将相关文件复制到D盘的某个目录，接着附加数据库即可。 SQL Server 2000允许分
如果您数据库系统安装在系统盘(比如C盘)，由于C盘容易受病毒侵害，您也许希望您的数据存放在非系统盘(比如D盘)，要做的这点很简单，您并不需要重装数据库，只要把数据“分离”，然后将相关文件复制到D盘的某个目录，接着“附加”数据库即可。
SQL Server 2000允许分离数据库的数据和事务日志文件，然后将其重新附加到同一台或另一台服务器上。分离数据库将从SQL Server 删除数据库，但是保持在组成该数据库的数据和事务日志文件中的数据库完好无损。然后这些数据和事务日志文件可以用来将数据库附加到任何SQL Server实例上，这使数据库的使用状态与它分离时的状态完全相同。
数据库分离和附加其实很简单，您即使是初次接触数据库，，做起来也很容易。
一、分离数据库
1、点击“程序》Microsoft SQL Server》企业管理》”，打开企业管理器
2、展开服务器组，然后展开服务器，选中要分离的数据库
3、点击鼠标右键“所有任务》分离数据库”，出现如下窗口
4、点击确定，该选定的数据库就被分离。
应注意，只有“使用本数据库的连接”数为0时，该数据库才能分离。所以分离数据库时尽量断开所有对要分离数据库操作的连接，如果还有连接数据库的程序，会出现数据库的连接状态窗口，显示正在连接此数据库的机器以及名称，点击清除按钮将从服务器强制断开现有的连接。
二、附加数据库
1、复制移动数据库文件
在附加数据库之前，您必须将与数据库关联的 .MDF(主数据文件).LDF(事务日志文件)这两个文件复制到目标服务器上，或是同一服务器的不同文件目录下。这两个文件一般位于C：Program FilesMicrosoft SQL ServerMSSQLData目录下。
2、点击“程序》Microsoft SQL Server》企业管理》”，打开企业管理器
3、展开服务器组，然后展开服务器
4、右击"数据库"，然后选择“所有任务》附加数据库”，弹出窗口
5、输入要附加的数据库的MDF名称。如果不确定文件位于何处，单击浏览("...")搜索。若要确保指定的 MDF 文件正确，请单击"验证"。在"附加为"框内，输入数据库的名称。数据库名称不能与任何现有数据库名称相同。指定数据库的所有者
6、单击"确定"按钮。新附加的数据库的数据库节点即创建在"数据库"文件夹中。
How does MySQL's licensing compare to other database systems?Apr 25, 2025 am 12:26 AMMySQL uses a GPL license. 1) The GPL license allows the free use, modification and distribution of MySQL, but the modified distribution must comply with GPL. 2) Commercial licenses can avoid public modifications and are suitable for commercial applications that require confidentiality.
When would you choose InnoDB over MyISAM, and vice versa?Apr 25, 2025 am 12:22 AMThe situations when choosing InnoDB instead of MyISAM include: 1) transaction support, 2) high concurrency environment, 3) high data consistency; conversely, the situation when choosing MyISAM includes: 1) mainly read operations, 2) no transaction support is required. InnoDB is suitable for applications that require high data consistency and transaction processing, such as e-commerce platforms, while MyISAM is suitable for read-intensive and transaction-free applications such as blog systems.
Explain the purpose of foreign keys in MySQL.Apr 25, 2025 am 12:17 AMIn MySQL, the function of foreign keys is to establish the relationship between tables and ensure the consistency and integrity of the data. Foreign keys maintain the effectiveness of data through reference integrity checks and cascading operations. Pay attention to performance optimization and avoid common errors when using them.
What are the different types of indexes in MySQL?Apr 25, 2025 am 12:12 AMThere are four main index types in MySQL: B-Tree index, hash index, full-text index and spatial index. 1.B-Tree index is suitable for range query, sorting and grouping, and is suitable for creation on the name column of the employees table. 2. Hash index is suitable for equivalent queries and is suitable for creation on the id column of the hash_table table of the MEMORY storage engine. 3. Full text index is used for text search, suitable for creation on the content column of the articles table. 4. Spatial index is used for geospatial query, suitable for creation on geom columns of locations table.
How do you create an index in MySQL?Apr 25, 2025 am 12:06 AMTocreateanindexinMySQL,usetheCREATEINDEXstatement.1)Forasinglecolumn,use"CREATEINDEXidx_lastnameONemployees(lastname);"2)Foracompositeindex,use"CREATEINDEXidx_nameONemployees(lastname,firstname);"3)Forauniqueindex,use"CREATEU
How does MySQL differ from SQLite?Apr 24, 2025 am 12:12 AMThe main difference between MySQL and SQLite is the design concept and usage scenarios: 1. MySQL is suitable for large applications and enterprise-level solutions, supporting high performance and high concurrency; 2. SQLite is suitable for mobile applications and desktop software, lightweight and easy to embed.
What are indexes in MySQL, and how do they improve performance?Apr 24, 2025 am 12:09 AMIndexes in MySQL are an ordered structure of one or more columns in a database table, used to speed up data retrieval. 1) Indexes improve query speed by reducing the amount of scanned data. 2) B-Tree index uses a balanced tree structure, which is suitable for range query and sorting. 3) Use CREATEINDEX statements to create indexes, such as CREATEINDEXidx_customer_idONorders(customer_id). 4) Composite indexes can optimize multi-column queries, such as CREATEINDEXidx_customer_orderONorders(customer_id,order_date). 5) Use EXPLAIN to analyze query plans and avoid
Explain how to use transactions in MySQL to ensure data consistency.Apr 24, 2025 am 12:09 AMUsing transactions in MySQL ensures data consistency. 1) Start the transaction through STARTTRANSACTION, and then execute SQL operations and submit it with COMMIT or ROLLBACK. 2) Use SAVEPOINT to set a save point to allow partial rollback. 3) Performance optimization suggestions include shortening transaction time, avoiding large-scale queries and using isolation levels reasonably.
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
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
SecLists
SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.
Dreamweaver CS6
Visual web development tools
SAP NetWeaver Server Adapter for Eclipse
Integrate Eclipse with SAP NetWeaver application server.
SublimeText3 Linux new version
SublimeText3 Linux latest version
SublimeText3 Mac version
God-level code editing software (SublimeText3)
