imp导入时出现imp-00017 ora-06550的解决办法
将exp逻辑备份文件导入到备库中时出现了错误,相关错误信息如下:
将exp逻辑备份文件导入到备库中时出现了错误,相关错误信息如下:
这是个很常见的导入警告,通常与数据库/客户端版本有关。比如这里,源数据库和目标数据库版本都是10.2.0.4,但导出的时候使用了10.2.0.1的客户端:
在别的项目中,还遇到过从10.2.0.2数据库中导入到10.2.0.4目标库时出现了同样的问题,不管imp/exp使用了什么版本。解决办法,就是在exp或imp时加上一个参数来禁用统计信息的导出/导入: statistics=none
那么,不导入统计信息会有什么影响呢。其实在oracle 10g以后,默认定时采集统计信息,可以在dba_scheduler_jobs视图中查询到该任务:GATHER_STATS_JOB。并且可以在dba_scheduler_job_run_details中看到相应的执行情况。
手动采集统计信息:在sys用户中执行dbms_scheduler.run_job('GATHER_STATS_JOB') 存储过程(等价于执行dbms_stats.gather_database_stats_job_proc);使用dbms_stats包中的gather_xxx_stats来采集。停用定时采集统计信息的任务:DBMS_SCHEDULER.DISABLE('GATHER_STATS_JOB')
oracle 10g中修改自动采集统计信息的时间策略:通过sys用户登录执行存储过程dbms_scheduler.set_attribute来修改,,例如
dbms_scheduler.set_attribute('GATHER_STATS_JOB','SCHEDULE_NAME','MAINTENANCE_WINDOW_GROUP')
dbms_scheduler.set_attribute('WEEKEND_WINDOW','DURATION','+000 05:00:00')
查询:

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

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics











The main role of MySQL in web applications is to store and manage data. 1.MySQL efficiently processes user information, product catalogs, transaction records and other data. 2. Through SQL query, developers can extract information from the database to generate dynamic content. 3.MySQL works based on the client-server model to ensure acceptable query speed.

InnoDB uses redologs and undologs to ensure data consistency and reliability. 1.redologs record data page modification to ensure crash recovery and transaction persistence. 2.undologs records the original data value and supports transaction rollback and MVCC.

MySQL is an open source relational database management system, mainly used to store and retrieve data quickly and reliably. Its working principle includes client requests, query resolution, execution of queries and return results. Examples of usage include creating tables, inserting and querying data, and advanced features such as JOIN operations. Common errors involve SQL syntax, data types, and permissions, and optimization suggestions include the use of indexes, optimized queries, and partitioning of tables.

MySQL's position in databases and programming is very important. It is an open source relational database management system that is widely used in various application scenarios. 1) MySQL provides efficient data storage, organization and retrieval functions, supporting Web, mobile and enterprise-level systems. 2) It uses a client-server architecture, supports multiple storage engines and index optimization. 3) Basic usages include creating tables and inserting data, and advanced usages involve multi-table JOINs and complex queries. 4) Frequently asked questions such as SQL syntax errors and performance issues can be debugged through the EXPLAIN command and slow query log. 5) Performance optimization methods include rational use of indexes, optimized query and use of caches. Best practices include using transactions and PreparedStatemen

MySQL is chosen for its performance, reliability, ease of use, and community support. 1.MySQL provides efficient data storage and retrieval functions, supporting multiple data types and advanced query operations. 2. Adopt client-server architecture and multiple storage engines to support transaction and query optimization. 3. Easy to use, supports a variety of operating systems and programming languages. 4. Have strong community support and provide rich resources and solutions.

Compared with other programming languages, MySQL is mainly used to store and manage data, while other languages such as Python, Java, and C are used for logical processing and application development. MySQL is known for its high performance, scalability and cross-platform support, suitable for data management needs, while other languages have advantages in their respective fields such as data analytics, enterprise applications, and system programming.

MySQL is suitable for small and large enterprises. 1) Small businesses can use MySQL for basic data management, such as storing customer information. 2) Large enterprises can use MySQL to process massive data and complex business logic to optimize query performance and transaction processing.

MySQL index cardinality has a significant impact on query performance: 1. High cardinality index can more effectively narrow the data range and improve query efficiency; 2. Low cardinality index may lead to full table scanning and reduce query performance; 3. In joint index, high cardinality sequences should be placed in front to optimize query.
