what is difference between ods and data warehouse

The difference between the two is that dpkg bypasses the apt package management database to operate the software package, so you can use apt to install the software package that dpkg has installed again. The system does not know that the software package has been installed before, the previous installation of dpkg will be overwritten. 1. dpkg is used to install t

What is the difference between equals () and hashcode ()?-------------------------------------------------Equals (): reflects the specific value of an object or variable, that is, the value contained within two objects- -either a reference to an object or a value of a value type.Hashcode (): Computes the hash code of t

the parameters to understand it? What is the PRC application I'm sorry I wrote it wrong, RPC.RPC (Remote Procedure call Protocol)?? A remote procedure call protocol, which is a protocol that requests services from a remote computer program over a network without needing to know the underlying network technology. The RPC protocol assumes that some transport prot

What is the difference between the unique key constraint of SQLServer and the unique index ?, Sqlserver Index I used to want to know what the difference was, but I forgot it because we seldom use the unique key constraint. A few days ago, my colleague gave me a script to con

What is the difference between a server and a normal computer? Common 1U Servers What is a server? First we look at the professional server is how to define, the server is a high-p

Abstract class and interface are two mechanisms supported for the definition of abstract classes in Java. It is precisely because of the existence of these two mechanisms that give Java powerful object-oriented capabilities. Abstract class and interface have great similarity in support for the definition of abstract classes, and can even be replaced with each other, therefore, when defining abstract classes, many developers may choose abstract classes

Recently the park Teamone wrote a "[C #] int and System.Int32 What difference", found that there are many wonderful comments, so could not help but want to summarize this article:>The main references in this article are:1. Understanding System.Int32 and int in C #: not chickens and eggs @Author:D ixin2. What is the

What is the difference between object-oriented programming and process-oriented programming? C language is process-oriented programming. It is the most important feature of a function. It calls subfunctions through the main function. The program running sequence

Difference between ID and name in Form (input) However, name cannot be replaced in the following purposes: 1.Form Control name. The submitted data is controlled by the Control name rather than the ID. Because many names correspond to multiple controls at the same time, such as checkbox and radio, ID must be unique in the entire document. In addition, the browse

What is the difference between M and C in MVC mode? What is the difference between M and C in MVC mode? For example, to create a student information management system, M can add, delete, modify, and query student information and o

What's the difference between core i3 and i5 and i7? First, let's focus on the difference between i3 and i5: Core Core i3 i5 i7 pin Difference What is the difference between the core i3 and i5, the core i3 and i5 which

First you need to explain what the two abbreviations for CPU (the processing unit) and the GPU (Graphics processing Unit) represent respectively. CPU is the central processing unit, the GPU is the graphics processor. Second, to explain the difference between the two, first understand the similarities: both have a bus a

What is the difference between the exec function and the shell_exec function in PHP? execshell_exec Both of these functions execute Linux Command functions. The difference is that the returned results are different. exec can only obtain the last row of

What is the difference between DATASET and DATAREADER? datasetdatareader The biggest difference between DataReader and DataSet is that DataReader always occupies SqlConnection (commonly known as non-disconnected connections) during use. When you operate a database online, an

{Code...} What is the essential difference between Recursion and loop? For example, in the above recursion, is each recursion a new scope? That is to say, $ level + 1 here is actually 0 + 1 each time, right? Public function noLimi

Often see network friends in the difference between the switch and router, in fact, if you have used both switch and router friends should know, for everyone, switch and router use the biggest difference is that the router can realize dial-up internet access, and then shared to multiple computers at the same time the Internet, But the switch does not have the dia