IntroductionThe evaluation of several modeling tools was highlighted in the previous blog, and SQL Power architect was selected as the final modeling tool, and the Oracle Data Modeler support Vertica was also studied during the evaluation process, although the eventual abandonment of Oracle
Due to the need to record increasingly complex data warehouse implementations, IT staff in the U.S. Omaha Public Power Division had to purchase a new set of graphical data modeling tools, but it was almost impossible to obtain approval from the parent company for the project.
The utilities were responsible for providing electricity to most of the Nebraska State,
Tags: des c a file data usageToday, we are prepared to further refine the functionality and make it more automated, based on the gadget model_sql written @zhangkai05. Convenient for modeling personnel to develop ETL tasks.After the source code changes, it is published to Git (URL address) and is gradually perfected.Describe the status quo and problemsTeam Data Wa
Label:1. BackgroundIn the production of the overall open source toolbox products, data warehousing is an important link. Although PostGIS provides data warehousing interface operations, this tool cannot be integrated into our toolbox, and the tool interface, operation is not ideal, and can not be customized to complete
building a data warehouse, we can summarize a set of modeling methods suitable for ourselves, which can help customers better play the role of data warehouse.The main line of this article is to answer the following three questions:
What is a data model?
Why do we need a
main line of this article is to answer the following three questions:
What is a data model?
Why do we need a data model?
How to build a data model
Finally, we will introduce a specific data warehouse modeling example at the end of this article to help you understand th
Definition: divides an application into many small pieces (objects) using the object-oriented method. These objects are independent and then combine these objects to create programs.
Features: packaging, inheritance, and polymorphism.
Commonly used modeling tools: playcase, Rational Rose, Computer Association bpwin, Computer Association Erwin, oracle designer/2000, Sybase powerdesigner
UML language Overview
Definition: a unified object-oriented
lucky, everyone can win at the end of the game.
Chapter 3: ensuring high-quality DefinitionsThis chapter focuses on a tool called the definition checklist, which includes guidelines to ensure that the defined quality is at the highest level.
Chapter 4: project plans of Data modelersThis chapter focuses on four tools for determining the data
Data Warehouse is the "heart".
Chapter II: Metadata Bingo Game
In simple terms, that is, through the bingo card game, to motivate the project team members to determine the data model and determine the effectiveness of the metadata. The Meta Data Bingo game emphasizes "total win", and if you're lucky, everyone wins at the end of the game.
Chapter III: Ensuring
Tags: Distributed system statistics IMG Resume timestamp ODB bigtable DB instance based on1. Preface In order to adapt to the requirements of big data scenarios, new architectures such as Hadoop and nosql that are completely different from traditional enterprise platforms are rapidly emerging. The fundamental revolution of the underlying technology will inevitably affect the superstructure: data models and
operation, such as sending an email. It is used to analyze data and discover new values from existing data. It is mainly used to predict future situations. A data warehouse is not a general structure for solving all problems. It must be concentrated in a certain problem area, such as aviation services and customer benefits.
The
regression method, backward regression method, stepwise regression method4. The steps of linear regression analysis
(1) To do the basic analysis of the data, the analysis is the potential of the interpretation of the variables and the underlying relationship between the variables to be interpreted;(2) The candidate model can be constructed according to the results of preliminary analysis;(3) To test the validity hypothesis of candidate model;(4) to d
-index a PostgreSQL database
Vacuumdb - garbage collection and analysis of a PostgreSQL database
Iii. PostgreSQL Server Application
Initdb--Create a new PostgreSQL database cluster
pg_archivecleanup --Clean up PostgreSQL WAL archive file
pg_controldata -Displays c
Configuring system environment VariablesModify the profile file under etc by directly editing the file or by using the command line tool VI. Vi/etc/profile Add the configuration: Export ld_library_path=/opt/postgresql/9.2/lib; $LD _library_path Export path=/opt/postgresql/ 9.2/bin: $PATH Export Pgdata=/opt/postgresql/
Postgresql to mysql tool bitsCN.com
I collected some articles on postgresql to mysql on the internet. most of them said that I first exported the SQL script from postgresql, and then manually changed some of the statements in the SQL script to the mysql format, I thought that if I was a big
I. INTRODUCTION to psql is a PostgreSQL command line interactive client tool, similar to the command line tool sqlplus: 1 in Oracle allows you to interactively type SQL or commands, then they are sent to the PostgreSQL server, and then the SQL or command results are displayed; 2 input
I. INTRODUCTION to psql
Psql is a
Data modeling of Enterprise Architect 8 (Introduction)
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We can use UML Data modeling configuration in Enterprise Architect to make database modeling and database design. This configuration provides an extension of the UML standard that is easy to use and easy to un
I collected some articles on postgresql to mysql on the Internet. Most of them said that I first exported the SQL script from postgresql, and then manually changed some of the statements in the SQL script to the mysql format, I thought that if I was a big data company, I would also manually change the data to mysql?Www
Postgresql pgbench tool pgbench is a benchmarking tool for PostgreSQL. pgbench is a performance benchmark tool provided by postgresql. You can use pgbench -- help to check the parameter Usage: pgbench [OPTIONS]... [DBNAME] Initial
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