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ETL

ETL. Extract Transform Load. Introduction of ETL. ETL is used to migrate data from one database to another, to form data marts and data warehouses and also to convert database from one format or type to another. Process of ETL. Extract Process of reading data from a database Transform

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ETL

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  1. ETL ExtractTransformLoad

  2. IntroductionofETL • ETL is usedtomigratedatafromonedatabasetoanother,toformdatamartsanddatawarehousesandalsotoconvertdatabasefromoneformatortypetoanother

  3. Process of ETL • Extract • Processofreadingdatafromadatabase • Transform • Processofconvertingtheextracteddatafromitspreviousformintotheformitneedtobe • Byusingrulesorlookuptablesorbycombingthedatawithotherdata • Load • Processofwritingthedataintothetargetdatabase

  4. Operations of Transform • Selectingonlycertaincolumnstoload • Translatingcodedvalues • Encodingfree-formvalues • Sorting • Joiningdatafrommultiplesources • Aggregation • Splittingacolumnintomultiplecolumns • Derivinganewcalculatedvalues • …

  5. Pentaho Data Integration • Pentahodataintegration(PDI, alsocalledKettle) isforETLprocesses. • Download:http://sourceforge.net/projects/pentaho/files/DataIntegration/ • Two partsofPDI • Transformation: transformationistheprocessofETL • Job:jobisusedtoruntransformation

  6. Transformation • Definition Hop Note Step

  7. MainComponents Input Output Transformation Allcomponents

  8. Job • Definition Hop Note JobEntry

  9. ComponentsofPDI • Spoon • GUItooltodesigntheETLprocesstransformations. • Creatingjobswhichautomatethedatabaseupdateprocess • Performingthetypicaldataflowfunctionsincluding:reading,validating,refining,transforming,writingdata • Pan • ApplicationtorundatatransformationsdesignedinSpoon • Kitchen • Applicationhelpsexecutethejobsinabatchmode,usuallyusingaschedule • Carte • AwebServerwhichallowsremotemonitoringoftherunningPDIETLprocessesthroughawebbrowser

  10. FeatureofPDI • SimpleVisualDesigner • GraphicETLtool • Dynamictransformations • Integrateddebuggerfortestingandtuningjobexecution

  11. FeatureofPDI • Drag and Drop Integration • Richlibraryofpre-buildcomponentstoaccess • IntegrationwithZero-CodingRequired • PowerfulAdministrationandManagement • DataProfilingandDataQuality • Identifydatathatfailstocomplywithbusinessrulesandstandards • Managerdataqualitywithpartnerssuchashumaninterface

  12. FeatureofPDI • Support for Any Big DataSource

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