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Can anyone tell me which is the first step of the ETL process?

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The first step of the ETL process in Informatica is Extract.

Extract:

  • PowerCenter reads data, row by row, either from a table or group of related tables in a database, or file
  • This database or file is specified as the source
  • The structure of the source is specified in a source definition object.

If you want to learn Informatica, check out this Informatica Certification program by Intellipaat

Also, watch this video on Informatica ETL tool:

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