what is use of materialized view in 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. R

reading a series of database logs and writing them to the file, which is independent of the location of the log reads. (i), export/import (Export/import) Export can be used to extract data from the database, the use of import can be extracted from the data returned to the Oracle database. 1, simple Export data (export) and imported data (import)

What is the use of interface interface in PHP? What should I pay attention to What is a PHP interface? Using interfaces (interface), you can specify which methods a class must implement, but you do not need to define the specif

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

[51CTO quickly translated from toutiao.com in September 22] If you want to give you a minute to become the president of Oracle, you are not required to wear LarryEllison's expensive suit on his yacht, but let you decide the fate of MySQL. What do you do? Just spent 7.4 billion to acquire SunMicrosystems, and the EU anti-monopoly investigation committee suddenly moved out of this person 51CTO

HACMP can be said to be a server engineer, and there is no unknown-IBM's housekeeping architecture. I have recently asked readers to talk about the issue of HACMP by phone or email. Here, I will repost an article from IBM, which is very well written and accurate. It is a lot better than what I said. Everyone will benef

What is CSS expression? Ie5 and later versions support the use of expression in CSS to associate CSS attributes with JavaScript scripts. the CSS attributes here can be inherent attributes of elements or custom attributes. That is to say, the CSS attribute can be followed by a javascript expression. The value of the C

Thickness under LineRule and the original value is 0, I will change it to 0.3. What will happen? After saving the changes, refresh the map (move the mouse to refresh the map) and you will find that the lines will become thicker. The original line width is controlled. Well, this is a simple application. You can

What is the TXPlatform.exe process? TXPlatform.exeTXPLATFORM-TXPLATFORM.EXE-QQ Related process informationProcess files: Txplatform or TXPlatform.exeProcess name: Txplatform or TXPlatform.exeThe external Application Development Interface management program used jointly by QQ and TM is an important underlying core module. If you remove the program, QQ or TM will

that there is actually a valid number of rows in the index data block We can use the stored procedures provided by Oracle to compute the meaning of address 4255579: Sql> Select Dbms_utility.data_block_address_file (4255579) from dual; Dbms_utility. Data_block_address_file (4255579) --------------------------------------------- 1 Sql> Select Dbms_utility.data_b

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

If you only use Oracle to delete data in the actual application, the installation interface disappears when you click Next, you have to reinstall the system, causing a lot of unnecessary trouble. In fact, this is not the case if you delete the database. Implementation Method: 1. Choose "start"> "Settings"> "Control Panel"> "Administrative Tools"> "services" to st

[Translated from mos] What is the difference between basic table compression and advanced compression in oracle databases?Differences between basic table compression and advanced compression,Extracted from the mos Article Difference Between Basic Table Compression And Advanced Compression (Doc ID 1548187.1)Applicable:Oracle Database-Enterprise Edition-Version 10.

Use logdump to view extract trail files (Getting Started) Use the logdump tool:Displays and searches for information in the goldengate trail file.You can save part of the information in the goldengate trail file to a separate trail file. 1. Start the logdump ToolShell> logdump 2. Get helpLogdump 1> help For more information, see Windows and Unix troubleshooting a

What is the use of the serialize function? What's the difference with JSON?Official explanation:Serialize (PHP3 >= 3.0.5, PHP4) Serialize---produces a value that can be stored in the notation syntax: String serialize (mixed value) Description: Serialize () returns one containing the VA Lue represents the Byte-stream string, which can be stored anywhere. This can

the data, such a huge table, so that the logical backup of data, query, and even based on log table fallback has produced a huge efficiency problem. How can I quickly and efficiently delete log information from three months ago, how can I quickly retrieve information about the current month, how to make full use of the physical environment of multiple disk space (bare devices), and increase the degree of parallelism balance I/O to improve the usabi

A reference is an alias for a target variable, and the action applied is exactly the same as a direct action on a variable. When declaring a reference, remember to initialize it. When the reference declaration is complete, the target variable name is equal to two names, that is