etl process in data warehouse ppt

Brief introduction Data integration is a key concept in the Data warehouse. The design and implementation of the ETL (data extraction, transformation and loading) process is an extremely important part of the

Introduction to ETL technology: Introduction to ETL, data warehouse, and etl Data WarehouseETL is the abbreviation of Extract-Transform-Load. It is used to describe the process of extra

Warehouse use ORACLE, then I think all ETL, can use the stored procedure to complete. In the larger Internet companies, due to the large amount of data, special requirements, ETL tools for their own development, Or do some two development on open source tools, and in actual work, A stored procedure, a Shell/perl scrip

ETL concepts The three ETL letters represent extract, transform, and load, namely, extraction, conversion, and loading. (1) Data Extraction: extract the data required by the target data source system from the source data source sy

sales_order--columns" Order_number, Customer_number, Product_code, Order_date, Entry_date, Order_ Amount "--where" Entry_date >= Date_add (current_date (), Interval-1 Day) and Entry_date 3) Add a piece of data to the source libraryINSERT into Source.sales_order values (Null,7,3,date_add (Current_date (), Interval-1 Day), Date_add (Current_date (), Interval-1 day), 10000); commit;4) Perform sqoop operationsSqoop Job--exec myjob_15) query in the RDS Li

coordination jobsHDFs dfs-put-f coordinator.xml/user/root/(4) Run the coordination jobOozie Job-oozie Http://cdh2:11000/oozie-config/root/job-coord.properties-runFrom the Oozie Web console, you can see the coordinated jobs ready to run, with the status of Prep as shown in.This coordination job starts on July 11, 2016 and executes 14 points per day. The end date is very late, which is set for December 31, 2020. Be aware of the time zone settings. Oozie The default time zone is UTC and does not w

In the data warehouse project, ETL is undoubtedly the most tedious, time-consuming, and unstable. If the data source and target are both oracle and meet certain conditions, you can use In the data warehouse project,

In the data warehouse project, ETL is undoubtedly the most tedious, time-consuming, and unstable. If the data source and target are both Oracle and meet certain conditions, you can use the oracle tablespace to improve ETL efficiency.To use a tablespace, the following conditi

deposits and withdrawals for this month at the fastest speed in the shortest time, if this type of query is placed on the original database, it will lose the meaning of the Data Warehouse. The ultra-large amount of data makes it impossible to query, at this time, you need to convert the meaningful data for this query

This course aims to achieveIn the SQL Server Enterprise ManagerData conversion Service (DTS) designerCreate an analysis services processing taskTo achieve automatic extraction, conversion, and filling of the data required by the Data Warehouse-------------------------------(For details, refer toCreate an analysis services processing task)This example is as follow

This paper gives the basic concept of SQL Server Data Warehouse, and uses the example construction process to analyze, for everyone's reference! Basic concepts: 1. Cubes: Cubes are the primary object of online analytical processing (OLAP) and are a technology that allows fast access to data in a

* ****** When writing data to the database in the php project, sometimes the Code does not prevent SQL injection, cause various unpredictable errors *******1. index.htm this is a very simple registration page l I submit data in ajax formCopy codeThe Code is as follows: 2, _ process. php receives files submitted by ajax and processed accordinglyCopy codeThe Code i

The previous article says Service Manger Management Server deployment process, the following will continue to introduce SCSM R2 another component Data Warehouse server deployment process 1, on the Service Manager installation media, double-click the "Setup.exe" file. 2. On the Service Manager installation media, doubl