what is star schema in data warehouse

improving products from 0.5 to 0.8. because of an existing product, data is placed there. 50 access times out for 100 users. If this problem is solved, the performance is improved by 50%.However, for new products ranging from 0 to 0.1, it is difficult to obtain the

Data structure to solve what problemHow to store data and information in a computer, and what methods and techniques are used to process the data, are the problems that a data structure needs to solve.Steps to solve the problemUse

Why is the data always inserted? This post was last edited by YXQC on 2014-05-05 14:20:32 From one database to another, there are 8 million data in the table. while ($mssql _row = Mssql_fetch_array ($rs)) $MID = $mssql _row[0]; $sql = "INSERT into Flow01 (TDM,) VALUES (' $TDM ',)"; mysql_query ($sql); And the ID of the inserted table

I have been chatting with several people recently and everyone has their own views on being active. In addition, many people who are unfamiliar with terms of analysis due to some standard issues have mixed up a lot of information such as being active and retaining. later I found that this is a very real problem. In my opinion, none of the problems have become problems. Therefore, I would like to talk about active things here to help more developers wh

650) This. width = 650; "src =" http://s3.51cto.com/wyfs02/M00/41/00/wKiom1PPw5nAo3BCAADiiUsyqvw722.jpg "Title =" 133716394.jpg" alt = "wkiom1ppw5nao3bcaadiiusyqvw722.jpg"/> What is big data? Big Data is confusing for new engineers. You are using it, for example, goolge se

While reading the Web information Architecture , the Nineth chapter talks about Thesaurus, controlled thesaurus and metadata. At that time, the definition in the book was very vague, and the length of the lecture was small, and there was no care and no complete understanding. The concept of metadata is mentioned again in chapter Fourth of the "splendid Blueprint" today. So I looked for some more information seriously understand a bit.

first of all, what is an escape character? The escape character, in fact, is the specified PHP syntax with "\" to output. However, the syntax of the rules in different systems to transfer the role of the character is different, for example: in the Windows System carriage return line character with "\ r" or "\ n", an

This is a face-to-face question for today's interview. what I think is simple is to record user data through cookies, and then send it to the server when the webpage is closed. I searched Baidu Statistics online and found GA-relat

How powerful is SQL Server's ability to compress data files? A few days ago, due to problems with customers (in fact, piracy issues ), you can only use the free SQLSERVEREXPRESS version SQLSERVER2005 express version of SQL Server. The data file size of the entire database is limited to 4 GB (SQLSERVER2012express versio

What is the data pattern in the Segmentfault framework? In the http://www.infoq.com/cn/news/2012/09/... Mentioned in the. Reply content: What is the data pattern in the Segmentfault framework? In the http://www.infoq.com/cn/n

Php always fails to query data. what is wrong with function ax ($ que) { If (! $ Connect) { $ Connect = mysql_connect ('localhost', 'axmanage', 'axmanpw '); Mysql_select_db ('dex ', $ connect); // The connection is successful, but the query always fails. $ Query = mysql_query ($ que); // This sentence fails. If

Where is the 1.SESSION information stored? Copy Code code as follows: Session_Start (); $_session[' name ']= ' Marcofly '; ?> Session default is saved to the C:\Windows\Temp directory, but by modifying the Session.save_path value in php.ini You can change the save path of the session. such as: Session.save_path = "D:/wamp/tmp" After executing the code, it will be in the D:/wamp/tm

What type of data is this? Is there a system function split? {"Text": [{"id": "One", "name": "Zhang"},{"id": "+", "name": "Wang"},{"id": "" "," name ":" Li "}]," src ":" en "," Time ": 0} Share to: ------Solution-------------------- $s = ' {"text": [{"id": "One", "name": "Zhang"},{"id": "" "," name ":" Wang "}

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

Interface testing is actually difficult to define, I understand that interface testing is not a white box test, but also for the Heihe test. Later, with our development chat, he said that the interface test is actually a part of the white box. Later, with one Ali Big data chat, he said the interface test belongs to (bl

What is the data analysis method on the tall?Huang Chengming Source: Public Number _ Data management (SJHGLWX)Often received some two or three years of graduation friends letter, this is a confused period. They study in the university is