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Unfortunately, Oracle encounters undo corruption while running. Of course, the best way is to completely recover it. But what if undo is damaged without backup? The following describes how to solve this problem. If you need a friend's reference, if undo damage is unfortunate
In oracle, what is a sequence ?, Oracle sequence? Sequence: a database object provided by oacle to generate a series of unique numbers. L automatically provides unique values L shared object L mainly used to provide the primary key value L loading sequence values into memory improves access efficiency Creation sequenc
Why is Oracle expdp faster than exp? What is the principle? First read the official oracle 10g documentation: Database Utilities Data Performance Improvements for Data Pump Export and ImportThe improved performance of the Data Pump Export and Import utilities
If you want to give you a minute to become the president of Oracle, you don't need to wear Larry Ellison's expensive suit on his yacht, but let you decide the fate of MySQL, what do you do? I just spent 7.4 billion yuan to acquire Sun Microsystems, and the European Commission for anti-monopoly investigations suddenly moved out of this everyone's favorite open-source database to find you. How do you choose?
Unfortunately, Oracle encounters undo corruption while running. Of course, the best way is to completely recover it. But what if undo is damaged without backup? The following describes how to solve this problem. For more information, see If undo damage is unfortunately encou
path API. This format was very similar to the format stored in Oracle database datafiles inside of tablespaces. Therefore, no client-side conversion to inserts statement bind variables is performed.--Exported data file is block format, not exp SQL statementThe supported data access methods, direct path and external tables, i
What is the difference between Oracle 10g versions! Oracle 10g Standard Edition Enterprise Edition Oracle10g is divided into four versions:1. Oracle Database Standard Edition one, the most basic commercial version, including bas
In the actual work we often encounter some Oracle database performance is low, of course, the reasons for the low performance of Oracle database is various, we can through some correct design and diagnosis to try to avoid some Oracle database performance
official recommendations.3. Oracle's official proposed swap setting standardFor an operating system running Oracle database, Oracle has a set size recommendation, as an example of the recommended size extracted from Oracle 12C R1 official Documentation: 4.3.4 Server Memory Minimum RequirementsEnsure that
Oracle databases are very different from MSSQL data operations, but there are analogies in mirroring operations. This article is about how MSSQL database mirroring is implemented in Oracle databases, and what differences exist between them. First, the mirror database in the
Oracle software generally uses the host name to allow the client to directly enter the host name of the server rather than the IP address network to connect to the server. To achieve this goal, you need to map the Host Name and IP address into a ing entry. In Windows, the rtlIPv Oracle software generally uses the host name to allow the client to directly enter the host name of the server rather than the IP
function can not specify a compressed backup, relatively Oracle's active protection function is very common; 6, the function of the operation of DB2 I also very much love, Oracle also has similar ahm, but the operation of DB2 more direct, can see what the database is currently in doubt, DB2 give the idea of how to dis
Replay eygle's example in the speech at the Oracle conference to see what is the master's starting point and face, replay eygle In his speech at the just-concluded Oracle conference, the company demonstrated the optimization of vertices and surfaces through a simple UPDATE statement,
Article Source: http://blog.csdn.net/haiross/article/details/383796151 Oracle: Table name, field name, constraint name are limited in length2 3 naming rules for Oracle:41, to start with a letter52, contains letters and numbers, and # $63, cannot exceed 30 characters7 8 This is the limitation of Oracle! 9 Ten database t
For an Oracle database tutorial, only physical and logical backups Physical Backup: A backup process that copies the operating system files that actually make up the database from one place to another, usually from disk to tape. Logical backup: Is the process of extracting data from a database in a SQL language and coexisting it in a binary file. The first class is
As an Oracle DBA, you must know what Metalink is.Metalink is the official technical support site for Oracle, its url: http://metalink.oracle.com. Oracle uses this website to support customers around the world. According to statistics from
Turn: What is the difference between MySQL and Oracle? 1. Oracle is a large database, while Mysql is a small and medium-sized database. The market share of Oracle
(as a character read) in the list2, fixed format: Record data, data type, data length fixed.3, variable format: Each record has at least one variable Long data field, and a record can be a sequential string.The demarcation of the data segment (e.g., name, age) as "," as a field;Brackets, etc.4. Loader can use the physical records of multiple contiguous fields to compose a logical record that records file run status files: including the following:1. Running Date: Software version number2, all in
What is the maximum length supported by the Oracle database table name? This article describes the maximum length that can be used by a table name in the Oralce database. The length is also the maximum length of the Oracle identifier, which
What is the silence killer of Oracle server virtualization VMware? -- Linux Enterprise Application-Linux server application information. For details, refer to the following section. Although Wall Street and the IT industry are still pushing for VMware, the company has apparently encountered serious challenges. According to the ESG research firm, large enterprises
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