what is use of materialized view in oracle

oracle| strategy What is Oracle's strategy for Linux? Oracle fully supports the Linux operating system. In fact, Oracle is the first commercial database available for Linux. By using Oracle's industry-leading offerings to support

What is the speed protection, 360 speed protector What is the use? This tutorial outlines its role. "Network Protection" is a unique feature of 360 security guards, can automatically optimize the 360 security browser, ie browser,

What is ddns? What is the purpose? How to Use nat123 dynamic domain name resolution ?, Ddnsnat123 What is ddns? What

/Tmp/. oracle,/var/tmp/. oracle What should I do if it is deleted? The official documents are described as follows: 3 Installing Oracle Grid Infrastructure and Oracle Real Application Clusters Caution: After installation

What is the difference between getMeasuredWidth and getWidth of View ?, Imageviewgetwidth0 GetMeasuredWidth indicates the measurement width of the view. GetWidth is the final width of the view. (The width and height are also di

What is the use of Redis database? What kind of database is suitable for Redis Rini?

, cost, ease of use, and so on, enable rapid development of system-level integration capabilities. What is SOC? With the development of design and manufacturing technology, IC design has evolved from transistor integration to logic gate integration. Now it has evolved to IP integration, that is, SOC (system on a c

following code will be problematic, the output is garbageint Main (void) { printf ("%d", sum (5 )); return 0 ;} int sum (intintint a) { return (a+b+c);}Output Result:[Email protected]:~/myprog/geeks4geeks/cpp$./A. out 1954607895[email protected]:~/myprog/geeks4geeks/cpp$./A. out 1943297623[email protected]:~/myprog/geeks4geeks/cpp$./A. out-16827881[email protected]:~/myprog/geeks4geeks/cpp$./A. out 67047927[email protected]:~/myprog/geeks4

Create view is_studentAsSelect SnO, sname, sageFrom studentWhere sdept = 'is'With check Option;With check option;, the insert operation cannot be performed:Insert into is_studentValues ('20140901', 'lila', 12)Why? Do not addWith check OptionYes! With check OptionIt can be explained as follows:The modified view must also be used to view the modified result.. For

What is the serial number of iPad air 2?IPad Air 2 [Settings]-[general]-[about the local machine], in the information about the local machine, we can view the serial number of iPad Air 2 (recommended to read: iPad Air 2, where is the serial number? What

In Linux, you often use CTRL and other key combinations, which are commonly used and what is the meaning of it? CTRL + C ends a running program Ctrl+d end input or exit shell Ctrl+s Pause Screen Output "Lock terminal" Ctrl+q restore screen output "unlock terminal" Ctrl+l clear screen, "lowercase letter

What is the function of the micro-photo frame? The shape of the micro-letter frame is a wedge-shaped from the side look at the tip of the width, from the front of a slightly trapezoidal; the overall design of the device is simple, with a 8-inch resolution of the IPS screen with a 1024 x 768 on the top, a microphone

+---------------------+---------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------+ |table |CreateTable | +---------------------+---------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------+ |personalinformation |CREATETABLE ' personalinformation ' ( ' nid ' int (one) d

1. Experiment: Use the layout editor to forcibly specify the two buttons with the same ID, and then Code Obtain the handle through findviewbyid () and modify its text. Experimental results: only the text of one button changes, and the other is not affected. 2. Experiment: Only one linearlayout is put in the main layout, and a new button

a blog he once created. He once wanted to delete it because what he wrote didn't show the professional image he wanted to show. As a result, he tried to prevent web crawlers used by search engines from accessing the content of his blog. He changed the so-called "keyword tag" and hoped that the Web Crawler would not display his blog content on the search engine. Although he thought the solution worked at the time, it does not mean that those articles

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

The trace file is a text file followed by TRC, which records the various SQL operations and the time spent, and, depending on the trace file, we can understand which SQL is causing the system's performance bottlenecks and then take the appropriate approach to tuning.When we operate the Oracle database, a session is gen

How to Use the TKPROF command in oracle to view Tracefile Trace file is a subsequent text file of trc, which records various SQL operations and the time consumed, based on the trace file, we can understand which sqls cause system performance bottlenecks and take appropriate optimization methods. When we operate the

If you want to better use Oracle External tables to view related alarm information, you must first understand the concept of Oracle External tables and the differences with other tables, to create a relatively simple Oracle External table (mainly depends on the operation pro

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