what is use of materialized view in oracle

--View the use of table space files SELECT MAX (b.file_id) ID, B.tablespace_name table Space, B.file_name Physical file name, b.bytes/1024/1024 size M, (B.bytes-sum (NVL (a.bytes, 0)))/1024/1024 has used M, SUBSTR (B.bytes-sum (NVL (a.bytes, 0))/(b.bytes) * 100, 1, 5) utilization From Dba_free_space A, Dba_data_files B WHERE a.file_id = b.file_id GROUP by B.tablespace_name, B.file_name, b.bytes Order

In the past few years, when Oracle databases abandoned the relevant client OracleForms, some of the built-in functions that subsequently disappeared were about the function (alert message function) passing parameters. If you handle errors or missing input parameters. Part of the Forms migration process is to change this built-in function from 6i to 9i. Complex applications may contain thousands of warning m

:10.2.0.5, 11.1.0.7.3, 11.1.0 .7 Patch for Windows and 11.2.0.1 4. Bug 7587008-hung RAC instance not evicted from cluster Document 7587008.8 Fixed in:10.2.0.4.4, 10.2.0.5 and 11.2.0 .1, one-off patch available for various 11.1.0.7 release 5. Bug 11890804-LMHB crashes instance with ORA-29770 after long "control file sequential read" Waits Document 11890804.8 Fixed in 11.2.0.2.5, 11.2.0.3 and 11.2.0.2 patches on Windows 6. Bug:13732226-node GETS Evicted with REASON CODE 0X2 Bug:13399435-kjfcdr

[Oracle] undo corruption without backup. What should I do if undo corruption is unfortunately encountered in Oracle running? Of course, the best way is to recover completely, but if there is no backup, you can

---------------------------------------------------------------------------------------- + |Id|Operation|Name|Rows|Bytes|Cost (%CPU)|Time| A ---------------------------------------------------------------------------------------- the | 0 | SELECTSTATEMENT| | 1 | 207 | 2(0)| xx:xx: on | + | 1 | TABLEACCESS by INDEXROWID|ECHO| 1 | 207 | 2(0)| xx:xx: on | - |* 2 | INDEXRANGE SCAN|Echo_ind| 1 | | 1(0)| xx:xx: on | $ -------------------------

software, testing the effectiveness of tuningChongqing si Zhuang Oracle Database performance Optimization 10 OCM expert teamHttp://www.cqsztech.com/content/109/227.htmlChongqing si Zhuang Technology Co., Ltd. is the Oracle third-party technical service units, southwest China is the earliest professional provider of

This is a recovery that is performed by the system. No human management and operation is required. This method is generally used when the system fails due to sudden power failure. Automatic recovery occurs when the database is started again. Unlike a simple DOS system, the

After understanding the persistence capabilities and principles provided by the VCL framework, the next question is how do we use this knowledge to increase our ability to develop our own Delphi applications on a daily basis? This is a good question, because I have observed that many programmers are very satisfied after they have learned some specific technology,

Index | performance ORA FAQ Performance Tuning Series-- The Oracle (tm) Users ' co-operative FAQ Why would a reverse index to useful when the leading column of the "index is" generated from a sequence? When the first column of the index is generated by the sequence, what is

download and install the required jar files to the local library.A local library is a copy of maven that is stored on the local machine after the plugin or JAR file has been downloaded. On Linux, it's located on ~/.m2/repository, on Windows XP, on C:\Documents and Settings\username\.m2\repository, on Windows 7, in C:\Us Ers\username\.m2\repository. When Maven looks for the jar file that it needs, it looks

When I first started learning about iPhone development, I would like to share some experiences and experiences on creating simple interfaces, so as not to forget or follow a good record in the future. If there are any deficiencies, please correct them. This article mainly shares how to create a simple Temperature Converter Using xcode4. Of course, the focus here is not the Temperature Converter, but the method of creating a

1. B-tree IndexThe most common index type in an Oracle database is the B-tree index, the B-tree index, named after its scientific structure with the same name. CREATEWhen the index statement is created, the default is to create the B-tree index. No special provisions can be used in any situation.2. Bitmap indexing (bit

In the background written in php, make an edit and use ajax. When initiating a request, the system prompts that json is not defined. What is wrong? In the background written in php, make an edit and use ajax. When initiating a request, the system prompts that json

= new BufferedReader (new InputStreamReader (system.in));Same point:Inputstream,outputstream,reader,writer are abstract classes. So you can't just newThe difference between a byte stream and a character streamThe byte stream is very similar to the use of character streams, so what is the difference between the operati

1. What is a servlet? * Server-side Java programs, Servlets need to be handed to the server to run. * Java program related to Javax.servlet.Servlet interface 2, how to use servlet? "Must" * Create a WEB project * Create a class and implement a servlet interface * to the server to run/web-inf/web.xmlRegister Servlets - servlet> Servlet-name>H

Oracle client installation without using PL/SQL to connect to Oracle everyone knows that using PL/SQL to connect to Oracle requires installing the Oracle client software. Have you ever wondered whether to directly connect to Oracle without installing the

View the hidden process in the window. There is often a hidden process that occupies about 20% of the CPU. I don't know what the program is causing. It's very depressing.I don't know how to find out the process that is not seen in the process that occupies a large amount of

) Findviewbyid (R.ID.AV); Av.setlistener (this); } @Override public void Keyboardclose () { et.setbackgroundresource (r.color.yellow); } @Override public void Keyboardopen () { et.setbackgroundresource (r.color.red); }}It's so simple and easy to use, but you need to set android:windowsoftinputmode= "Adjustresize". What you need can be taken away.Author original, wel