ETLwith talend

POOJA B. MISHRA

What is ETL?Extract is the process of reading data from a database

Transform is the process of converting the extracted data from its previous form into the form it needs to be in so that it can be placed into another database. Transformation occurs by using rules or lookup tables or by combining the data with other data

Load is the process of writing the data into the target database

Process flow

Terms closely related and managed by ETL processes data migrationdata management data cleansingdata synchronization data consolidation.

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Different ETL tools

•Oracle ETL•Ab Initio•Pentaho Data Integration -Kettle Project (open source ETL)•SAS ETL studio•Cognos Decisionstream•Business Objects Data Integrator (BODI)•Microsoft SQL Server Integration Services (SSIS) •Informatica PowerCenter•Talend

Prerequisites Talend Open Studio for Data Integration

◦ http://www.talend.com/download VirtualBox

◦ https://www.virtualbox.org/wiki/Downloads Hortonworks Sandbox VM

◦ http://hortonworks.com/products/hortonworks-sandbox/#install

How to set up – Step 1

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Talend InterfaceWorkspace

Repository tree

Component configuration

Palette

WorkspaceRepository tree

Palette

Repository tree

Workspace

Palette

Component configuration

What are supported data input formats?•SQL

•MySQL

•PostgreSQL

•Sybase

•Teradata

•MSSQL

•Netezza

•Greenplum

•Access

•DB2

•Hive

What kinds of datasets can be loaded?

Talend Studio offers nearly comprehensive connectivity to:

Packaged applications (ERP, CRM, etc.), databases, mainframes, files, Web Services, and so on to address the growing disparity of sources.

Data warehouses, data marts, OLAP applications - for analysis, reporting, dashboarding, scorecarding, and so on.

Built-in advanced components for ETL, including string manipulations, Slowly Changing Dimensions, automatic lookup handling, bulk loads support, and so on.

What are data export formats?

Talend - ELT DB Components – Step 1

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Challenges involvedData volumes are growing exponentiallyData velocity is moving fasterAs information systems grow in complexity, the disparity of sources is growing as wellAll these target structures have different data transformation requirements and different tolerances in terms of latencyTransformations involved in ETL processes can be highly complex

Thank You!!