create a migration repository
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我们首先通过DBA_OBJECTS创建了一张有6万多条记录的表xuji_test,然后将这张表的并行度设置为20,然后做一个COUNT(*)操作,SQL执行后,从V$SQLAREA找到这条SQL的SQL_ID,然后查看执行计划: SQL> select * from table(dbms_xplan.display_cursor('8sj2h9nsq7s4h',null,'ADVANCED')); select count(*) from xuj...
Welcome to Microsoft SQL Server Books Online. This set of documentation helps you understand SQL Server, and how to implement data management and business intelligence projects. SQL Server includes several data management and analysis technologies. To learn more about these technologies, click the ...
Why Can't I Connect to the Server? If you are outside Oracle, you need an Internet connection to perform searches. There is a search form on the documentation home page, and links to search on other pages such as the list of books, list of initialization parameters, and so on. ...
"Create index WITH (ONLINE = ON)"是一种在SQL Server数据库中创建索引的语法。该语法中的"WITH (ONLINE = ON)"选项表示在创建索引的同时允许在线操作,即允许其他用户继续对表进行读写操作,而不会阻塞它们。 创建索引是提高数据库查询性能的重要手段之一。索引可以加快查询速度,减少数据库的IO操作。...
The Complete Oracle SQL Certification Course Microsoft SQL Server 2012 Certification Training Exam 70-461 Microsoft SQL Server 2012 Certification Training Exam 70-462 Conclusion The Complete SQL Bootcamp: Go from Zero to Hero “The Complete SQL Bootcamp:Go From Zero To Hero” is the best selling ...
Furthermore, SQL works with many of the popular relational database management systems like MySQL, MariaDB, PostgreSQL,MicrosoftSQL Server, Oracle Database, and more. And that's regardless as to whether you're running yourdatabase in the cloudor on-premises. ...
SQL记录-资源正忙online或nowait 1.多个tomcat 修改3个端口 2.oracle-00054:资源正忙 被锁住了 建立索引加online参数 1:创建索引时会产生的锁 2:dml 语句会产生的锁 3:索引创建时加上关键字 online时产生的锁 select for update nowait commit rollback...
"I am a beginner and the way this course starts isperfect for the person who has no introduction of SQL or Oracle." Do you have prior experience, but need a refresher or to fine-tune your skills? This is the course for you. Again, I'll let my students do the talking: ...