This topic will cover the process of data extraction, transformation, and loading (ETL), including best practices, tools, and techniques used to extract data from various sources, transform it into a usable format, and load it into a data warehouse.
Data Extraction, Transformation, and Loading (ETL) 1. Data Extraction: Definition: Data extraction involves retrieving data from various sources such as databases, applications, or files. Methods: Direct extraction from databases using SQL queries. Web scraping to extract data from websites. Extracting data from files like CSV, Excel, or JSON. Purpose: To gather raw data for further processing...…
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