etl wikipedia

Kettle Main content: one. ETL Introduction two. Kettle Introduction three. Java Invoke Kettle API first, the introduction of the ETL 1. What is ETL. 1). ETL is "Extract", "Transform", "load" three words of the acronym is also the data extraction, conversion, loading process, but our daily often referred to as the data

In the previous section, we crawled nearly 70 thousand pieces of second-hand house data using crawler tools. This section pre-processes the data, that is, the so-called ETL (extract-transform-load) I. Necessity of ETL tools Data cleansing is a prerequisite for data analysis. No matter how high the algorithm is, when an error data is encountered, an exception is thrown out, and it is absolutely dead. Howeve

of application programs and technologies for gathering, storing, analyzing and providing access to data to help enterprise users make better business decisions. A dw is a collection of data designed to support management demo-making. according to Bill inmon, a DW is a "subject-oriented, integrated, time-variant, nonvolatile collection of data in support of demo-- making. "DWS tend to have these distinguishing features: Use a subject-oriented dimen1_data model, Contain publishable

For a small etl scheduling, colleagues need to return the execution status of the stored procedure and control whether the subsequent dependency is executed, I only returned the output parameters of the stored procedure in the shell script that calls and executes the stored procedure, and did not write a specific control process for everyone. If you continue development in this way, that is a small etl sche

method can go to Wikipedia search.The classic question is: 1. Ask the top k problem, that is, the data entry is very large, but there are duplicate entries, requiring the most frequent occurrence of several entries. 2. Look for the same entries in both piles. (or find a duplicate entry) 3. Require that duplicate entries in a pile of entries be deleted and remain unique. 4. Give a bunch of data to determine if another data is in that pile of data. 5.

correctly set. Run dbms_metadata_util.load_stylesheets with SYSDBA [oracle@DB-Server admin]$ oerr ora 39213 39213, 00000, "Metadata processing is not available" // *Cause: The Data Pump could not use the Metadata API. Typically, // this is caused by the XSL stylesheets not being set up properly. // *Action: Connect AS SYSDBA and execute dbms_metadata_util.load_stylesheets // to reload the stylesheets. SQL> exec dbms_metadata_util.load_stylesheets Case 3: The error is as follows:

Pump cannot use the Metadata API because XSL stylesheets is not correctly set. Run dbms_metadata_util.load_stylesheets with SYSDBA [oracle@DB-Server admin]$ oerr ora 39213 39213, 00000, "Metadata processing is not available" // *Cause: The Data Pump could not use the Metadata API. Typically, // this is caused by the XSL stylesheets not being set up properly. // *Action: Connect AS SYSDBA and execute dbms_metadata_util.load_stylesheets // to reload the stylesheets. SQL> exec db

use the metadata API because the XSL stylesheets is not set properly. Need to perform dbms_metadata_util.load_stylesheets with SYSDBA --> [Oracle@db-server admin]$ oerr ora 39213 39213, 00000 , "Metadata processing is not available" //*cause:the Data Pump could not use the Metadata API. Typically, //This are caused by the XSL stylesheets not being set up properly. *action:connect as SYSDBA and execute dbms_metadata_util.load_stylesheets //to reload the stylesheets. Sql>e

: Images from www.lightroomsecrets.com In his blog there is an article Getting Kanji working in Emacs Wikipedia links The authors of Michael Widenius–mysql and MariaDBNote : Images from www.computerweekly.com In the clash of the DB egos, Widenius mentions: "... that's before I switched to Unix and found the best text editor in the WOR Ld:emacs "(that was before I used the Unix operating system to discover Emacs, the best te

Open-source Bi SYSTEM Directory Open-source Bi system Classification Bi application tools ETL tools Table tools Eclipse Birt OLAP tools Open source database Open-source Bi suite Bizgre Openi Pentaho Spagobi Open-source Bi system Classification Bi applicatio

refer to (wrong) guiding role.This list will be updated on an irregular basis (recently updated above) and is welcome to be amended and supplemented.Note: Most of the people I cite in this list are not known for using and developing Emacs, so the more precise title of this article should be: "Well-known Emacs users who are not known for Emacs."Marijn Haverbeke–eloquent, author of JavaScript and CodemirrorNote : Images from full-frontal.org In a discussion in Hacker news, Marijn mention

The data loading strategy mentioned in this paper is the OLTP system as the source system, and The general data loading strategy used by ETL data to be loaded into OLAP system. Depending on the specific nature of this approach, the ETL data load generally has the following four kinds of parties Case: 1. Time Stamp mode You need to uniformly add time fields as timestamps in the business tables in the OLTP sy