How To Check Index On Table In Oracle

Recently wanted to do a DataGrid function through PHP things, so that you can directly modify the contents of the database table, without the development of [new data page], [edit page], so looking for the Internet to find something similar A, open source, have paid, but basically are based on MySQL. Due to the need to connect to Oracle personally from the secondary development and page style phpMyDataGrid is still quite good. This article first introduced the use of MySQL-based methods, and then briefly introduce the Oracle connection (based on ...

As an outstanding representative of the Object relational database, Oracle is undoubtedly the most powerful. Whether it's the size of the database, the support of multimedia data types, the parallelism of SQL operations replication, or the security services, Oracle is much stronger than Sybase, Informix, Added to the latest version of the Oracle8.0.4 is to enhance the characteristics of this, but also introduced a number of new features, such as: Data partitioning (partitioning), Object-relational technology (objects relational T ...

1.1: Increase the secondary data file from SQL SERVER 2005, the database does not default to generate NDF data files, generally have a main data file (MDF) is enough, but some large databases, because of information, and query frequently, so in order to improve the speed of query, You can store some of the records in a table or some of the tables in a different data file. Because the CPU and memory speed is much larger than the hard disk read and write speed, so you can put different data files on different physical hard drive, so that the execution of the query, ...

After more than eight years of practice, from Taobao's collection business to today to support all of Alipay's core business, and in the annual "Double Eleven Singles Day" continue to create a world record for the transaction database peak processing capacity.

Method 1 delete yourtable where [id] not in (select max ([id]) from yourtable group by (name + value) b on a.id = b.id where b.id ...

Storing them is a good choice when you need to work with a lot of data. An incredible discovery or future prediction will not come from unused data. Big data is a complex monster. Writing complex MapReduce programs in the Java programming language takes a lot of time, good resources and expertise, which is what most businesses don't have. 　　This is why building a database with tools such as Hive on Hadoop can be a powerful solution. Peter J Jamack is a ...

At present, management informatization has been widely used in the world, and it has become one of the important means to maintain the core competitiveness of enterprises. 　　Foreign trade industry is our country's main economic pillar industry, but also the country's external economic window, it is directly facing the international market and the international peer competition. With the development of information technology, information management system in foreign trade enterprises as well as in other enterprises have been widely used and developed. 　At the same time, the maturity of Internet technology and the rise of E-commerce for China's foreign trade in the field of application and development opened a broad prospect. ...

A news incident last week attracted media attention, with nearly 450,000 passwords from 450,000 yahoo services called ' Yahoo Voice ' hacked. The comment on the incident said that hackers mainly through SQL injection (SQL injection) technology is the hacker from the database to obtain information and then release the information of the main technology adopted. Even if the original article is modified, you can find the error if you do a check. Technology is the same, as every more in-depth discussion can find new problems. ...