what is use of materialized view in oracle

Now explain what "high water level" is: Logical storage structure of Oracle: Tablespace--> segment--> Area--> block Block: is the smallest storage unit, now the standard block size is 8k,oracle every I/O operation

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

Tags: mysql current database1. View by Function database ()mysql> SELECT database ();650) this.width=650; "src=" Http://s5.51cto.com/wyfs02/M01/80/20/wKioL1c5OQHAujQZAAAMC4M3jFw898.png "title=" 1.png " alt= "Wkiol1c5oqhaujqzaaamc4m3jfw898.png"/>2. View by Statusmysql> status;650) this.width=650; "src=" Http://s1.51cto.com/wyfs02/M00/80/20/wKioL1c5OMLg9QBhAAB0ihW_G5U920.png "title=" 1.png " alt= "Wkiol1c5oml

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title is changed to ctime. According to the OS process number, you should be able to find out what SQL statement it is executing.-- Query the SID number of the Oracle OS process:Select SES. Sid from V $ session SES, V $ process pro where pro. spid = spid and SES. paddr = pro. ADDR;-- Query the SQL statement that the

I found that today, almost Eminence Oo and UML, there are still a lot of system analysts who have a smattering of Oo and UML, and even many system analysts who have been using UML for a long time. So I intend to write a series of articles, will be a summary of the work experience over the years. For beginners to play a role in the Enlightenment, but also hope to throw bricks, and all the way prawns together to explore and improve together. This series of articles will be based on my understand

method in the parent class must be executed before executing our defined method, so we can do something about it. Think of the "adorner" and see the Code:classHome (View):defDispatch (self,request,*args,**kwargs):Print('befor') Result= Super (home,self). Dispatch (request,*args,**Kwargs)Print(' after') returnresult#here is the use of class mapping to oper

the function must return a value and generally only return a value, while stored procedures do not have this restriction.From a general point of view, if you do not need to return a value or need multiple return values, using stored procedures, if you use only one return value, the function is used, from the general Programmer's habit, this

still use more detailed methods as long as they wish. It is important to note that the management of Bitmap segments is optional in Oracle9i and can only be implemented at the tablespace layer. The original system can continue to use traditional methods to manage freelist. Bitmap freelist challenges traditional space

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?

Label:Navicat for Oracle is a powerful set of Oracle database system management tools. It can run in more than 8i versions of Oracle database and supports most of its latest features. and help Oracle Beginners Learn how to use the

I started this question because a friend on MSN asked me today,What is DSI?.This is the first question. DSI isData Server InternalsIt is an internal teaching material used by Oracle to train Oracle aftersales engineers.Such docum

Tags: Flash back query1. View the table history moment dataSELECT * from Tab_test as of TIMESTAMP to_timestamp (' 20140917 10:00:00 ', ' yyyymmdd hh24:mi:ss ');2. Use Flashback table to restore the tables to a certain time in the pastALTER TABLE tab_test enable row movement; Flashback table Tab_test to timestamp (' 20140917 10:00:00 ', ' yyyymmdd hh24:mi:ss '); ALTER TABLE tab_test disable row movemen T3. C

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

Semmni, respectively, from left to right. Modify the method to:# echo 610 86620 142 >/proc/sys/kernel/sem# sysctl-w kernel.sem= "610 86620 100 142"# echo "kernel.sem=610 86620 142" >>/etc/sysctl.conf(1) Kernel.shmmax: This parameter defines the maximum size, in bytes, of a shared memory segment. The default value for Linux 2.4/2.6 is 32M, which is too low for Oracle