what is fact and dimension table in data warehousing

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

1, yes, we are big data also write common Java code, write ordinary SQL. For example, the Java API version of the Spark program, the same length as the Java8 stream API.JavaRDDString> lines = sc.textFile("data.txt");JavaRDDInteger> lineLengths = lines.map(s -> s.length());int totalLength = lineLengths.reduce((a, b) -> a + b);Another example is to delete a Hive table.DROP

How to judge what the file_get_contents data is encoded Title ------Solution-------------------- EUC-CN is the most commonly used representation of GB 2312. The "GB2312" on the browser encoding table is usually referred to as "E

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

Ask the data returned by json for an inexplicable explanation of what is going on in the preceding table. this post is edited and sent by z57737507 at 2015-10-1717: 00: 27 to the json file request file category. in the php database, the results of the corresponding table's j

When the data table name is changed (a regular prefix is added), must the system modify the SQL statement? The SQL format of the original system is as follows: select nbsp; * nbsp; from nbsp; 'table'; after going online today,

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

processing logic, and the policy is different message processing (I want to write a special article later)ArticleDescribes the mechanisms and policies ). What data-driven programming can do: As shown in the preceding example, it can be applied to function-level design. At the same time, it can also be applied in program-level design. For example, a

that the mechanism is the message processing logic, and the policy is different message processing (I would like to write an article later to introduce the mechanism and policy ).What data-driven programming can do:As shown in the preceding example, it can be applied to function-level design.At the same time, it can a

can easily understand the transparent table. Transparent tables refer to tables with identical structure definitions in the database in the ABAP dictionary. That is to say, for transparent tables in the ABAP, a database table with the same name must exist in the background database, in addition, the number and name of fields in the two tables are identical. Bec

A gas station management system developed by the company, written in C #, was previously developed using SQLSERVER2000, currently, the SQL Server 1.0 database is the same. The first version is 1.1, and the second version is, all are called GPOSDB, but the database of Version 1.1 has three table fields that are several

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

Tags: search engine version How to do not table Sele problem form statementFirst, the questionToday there is a magical problem-there is data in the table, but the result of select COUNT (*) is 0. The initial manifestation of the p

Ask JSON to get back the data inexplicable in front of the table what's going on This post was last edited by z57737507 on 2015-10-17 17:00:27 Send JSON file Request File category.php Corresponding tables in the database JSON results Data results in front of many inexplicable don't know where the table

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