What is the use of Custom Extractor in SAP R/3 system?

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<p>In order to extract data from tables, you need to follow steps:</p><ul class="list"><li>Create a View of the required table from where the data needs to be extracted or view over multiple joined tables</li><li>Navigate to Transaction SE11 and Select option &#39;View&#39;. It will ask for a name, name it something like &#39;View_TableName&#39;.<img src="/assets/questions/images/11407-1513763697.jpg" class="fr-fic fr-dii" width="600" height="351"></li><li>Select which all the fields of the tables needs to be extracted and click on activate</li><li>Go to Transaction RS02 and create a transaction extractor and name it something like &#39;Trans_TableName&#39;<img src="/assets/questions/images/18614-1513763712.jpg" class="fr-fic fr-dii" width="481" height="205"></li><li>Specify the position of the created extractor in the component hierarchy.</li><li>If you want to provide descriptions, add it. Specify the view name and save it.</li><li><p style="text-align: justify;">Besides using the view for DB extraction, the other ways to do the same are:</p><ul class="list"><li style="text-align: justify;">Using Function Modules</li><li style="text-align: justify;">&nbsp;Using SAP Query</li></ul></li></ul>

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