what is mdm in data warehousing

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What is metadata (meta data)

1. What is meta dataThe data in any file system is divided into data and meta data. Data refers to the actual data in the normal file, while

Number of fun web: What is a big data visualization search platform?

application solutions of big Data industry chain core layout.Play--A new play of www.dataqu.cn platformAugust 18 "Number of fun" on the day of the launch, the top 20 users will be registered in the number 1.2 version of a Lifetime Elite membership status and VIP exclusive features. August 18 "Number of fun" on-line conference will be synchronized live broadcast, will release five QQ group red envelope password, quick to "number of fun experience Divi

What is Bloom Filter for massive data processing?

What is Bloom Filter] Bloom Filter is a space-efficient random data structure. It uses a bit array to easily represent a set and determines whether an element belongs to the set. The efficiency of the Bloom Filter has a certain price: when determining whether an element belongs to a set, it

What is the difference between WebService and get post/get returned data? -Php Tutorial

What is the difference between WebService and data returned by obtaining postget? What is the difference between directly returning data by obtaining the post/get value and Web Service? What

Ask for php and socket experts. what kind of data format is this?

Ask for php, a socket expert, and check what type of data format I sent in hexadecimal format, however, the packet capture tool does not know what type of data format it translates into. see the shadow in the figure. ------ solution -------------------- hexadecimal php, socket expert, see

uint8_t/uint16_t/uint32_t/uint64_t is what data type-big summary, see completely understand

What data types are uint8_t/uint16_t/uint32_t/uint64_tIn Nesc's code, you'll see a lot of data types you don't know, such as uint8_t. At first glance, it seems like a new data type, but the C language (Nesc is the extension of C) doesn't seem to have this type of

What is the difference between a Web service and getting post/get return data?

What is the difference between directly returning data and Web service by getting the value of Post/get? What are the pros and cons? Suppose to make a simple API: Get commits the UserID and type, obtains both values after determining whether the UserID exists in the database, and returns the

Chapter One: What Is data operations

based on target response probability supported by data mining, focusing on product function optimization, target user segmentation, Activity (copywriting), channel optimization, cost control, etc.) theory Probability (probability): marketing, operations with probability as the core, the pursuit of refinement and accuracy rate Product (product): Focus on the function of products, emphasizing the product selling point Prospects (consum

What is the working mechanism of the data connection pool?

wait time) before it is released and 10 connections remain in the connection pool when no user is connected. In development, the connection pool fatigue error occurs when you use a connection pool without closing the connection (the Close method that invokes the connection). What are the main roles of the data connec

Cloud and data free teaching: What exactly is the UI? How to confuse with UX!

links. You can use visual style to make the interface look more beautiful ; You can study the user and find out what kind of interface to fit their needs and habits fully. But for software designers, the cloud and the data teacher suggest a deeper understanding UI In itself, the only part of the foundation that handy can benefit you a lot. To Learn more about the UI, you can scan the QR code below and lea

What is the separation of data stored in the database?

I received a lot of data from the front-end, such as A1, B1, A2, and B2... the properties of A (time) and B (content) are the same. in the database, I only want to use A text field to store it. Therefore, they need to be separated by characters, split the string when using it, but I don't know what character to use. I am afraid of this... I received a lot of data

When PHP modifies data from MySql, it is only valid for numeric operations and non-numeric operations. what should I do? _ PHP Tutorial

When PHP modifies data from MySql, it is only valid for numeric operations, and non-numeric operations are invalid. what should I do ?. Problem Description: use PHP to modify data to the MySql database to add, delete, modify (the database can be correctly connected). after testing, the code can only add, delete, and mo

System Idle process is the implementation code of what processes PHP simulates a socket connection, sending data multiple times

Copy CodeThe code is as follows: post.phpfunction Post ($host, $port){$host = "127.0.0.1";Establish a connection$conn = Fsockopen ($host, $port);if (! $conn){Die ("Con error");}Send 5 data in a loop//for ($i = 0; $i {$data = "User_name=admin". $i;WriteData ($conn, $host, $data);echo $i. "";}Fclose ($conn);}functio

What infrastructure is right for fast and big data architectures?

providing infrastructure for big data and newer fast data architectures is not a problem of cookie cutting. Both have significant adjustments or changes to the hardware and software infrastructure. Newer, faster data architectures are significantly different from big data ar

Ask for php and socket experts. what kind of data format is this?

Ask for php, a socket expert, and check what type of data format I sent in hexadecimal format, however, when we get to the packet capture tool, we don't know what kind of data format he translated into. in the shadow shown in the figure, we can find php and socket experts in hexadecimal notation, see

Data type confusion: what is an int (11 )?, Confusionint

Data type confusion: what is an int (11 )?, Confusionint Http://everythingmysql.ning.com/profiles/blogs/data-type-confusion-what-is-an Over and over I see MERs that don't understand whatint(11)Really means. Their confusion

What IP address is used in 3G data service

A large number of IP addresses are required when addressing mobile data services. The current public IPv4 address has become a scarce resource, so mobile data operators are faced with the problem of choosing the address between IPV6 and private IPv4 addresses. At present, the industry generally believe that the 3G should be used IPV6 address. In addition, the choice of IPV6

Java thousand ask _06 data Structure (020) _string is what

memoryComparison between string and stringbuffer efficiencyIn some special cases, the string object will not change at a slower rate than the StringBuffer object, especially in the following string object generation, where string efficiency is far faster than StringBuffer:String"hello ""world"new"hello ""world" );You'll be surprised to find that the speed at which the string object was generated was simply too fast, and at this time StringBuffer had

PHP What is the data type of a variable

What is the data type of a variableIn variables, because the variables occupy a different space unit (the site size is not the same), but also divided into several data types, like the supermarket packaging bags, there are several different types of goods, different products

What is ViewData, ViewBag and TempData? -MVC three ways to pass data between current and subsequent requests

type. In this way, the data is stored in the client's cookie and can be kept for a longer period of time. Row validation is also required, but there is no security guarantee. About ViewData and viewbag you need a more flexible should be shipped in the program. Because each page moves through the entire life cycle of t

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