what is fact and dimension in data warehousing

That's it. The core component of the large data development platform, the job scheduling system, then discusses one of the faces of the big Data development platform, the data visualization platform. Like a dispatch system, this is another system that many companies may want to build their own wheels ...

prefer to use mysql directly. Next, R is open-source, so new theories are updated quickly. data Processing is very convenient, especially for data frame list. What are you missing? biomedicine and research in schools like to use R to solve problems? many non-IT people need

matlab, so it's troublesome to perform mathematical operations unless you buy an iml library, but it's used by pharmaceutical companies because of its authority (the boss is fda certified) in addition, the bank's risk control will also use sas. the advantage is that the proc SQL built in big data processing is good, b

Depending on the data mining that you've heard or seen countless times, do you know what that is? Many scholars and experts give different definitions of what data mining is, and here are a few common statements:"To put it simply,

What is WF series? [build a data logic layer based on WF and WCF] What is WF? Many people who have some knowledge about NET technology can say something, but they cannot make it clear. No matter what you think WF

the naming service and directory service are for.The most effective way to learn new concepts and knowledge is by contacting and comparing them with what they have learned before. About the naming service, in fact, we often use it, but do not know it is it, more typical domain name server DNS (domains naming service),

A lot of mobile phone users, cell phone memory card generally have a lot of important things, such as photos, videos and so on, if the hand shook, accidentally formatted memory card can do? Don't worry, let's take a look at the memory card is not careful format what to do? Memory card data Recovery Tutorial now! The following

with the newly improved data listing features provided by Excel. You will find that Excel's table and data management capabilities are what you need. This chapter can help us manage our data more effectively. A database (also referred to as a table) is a collection of

What to look for when data is recovered First, do not format the partition again. The partition type changes after the first time the user formats the partition, causing data loss, such as the FAT32 partition Gecheng NTFS partition, or the original NTFS partition formatted as a FAT32 partition. After

number of Nexus switches to implement SDN because the company's business can only run on that system. There are winners and losers in the market.If the "software-defined" approach is seen as part of the struggle between hardware and software vendors, it can be said that VMware has won x86 server virtualization in storage and networking, and Amazon Web Services has won the IaaS. Most data centers are charac

add distinct when writing SQL statements to extract data: Select count (distinct passportid) from playerlogintable If the distinct statistics are not added, the total number of logins of all players will occur. What can daily activity analyze? In fact, only one day of daily activity can only perform a period-over-period or year-over-year analysis with the previo

user disconnects (the 11th to 20th connection), The connection will not be released immediately, but it will need to wait 10000 milliseconds (the maximum 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 invo

decisions are increasingly dependent on information, that is, data is increasingly dependent on data output (data is an important source of information ). The conclusion is certainly n

, we can back up the LDF file, then rebuild the entire database from scratch with these backed up transaction log records, and restore the database to any point in time, compared to the first method, through transaction logging. In fact, SQL Server uses both of these methods. Recovery mode Right-click Database Properties--options--you can see the "Recovery Model", the SQLSERVER2008 Database recovery model is