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SQLBolt. These 19 self-paced, interactive lessons start from the basics of SQL queries and work their way up to creating tables and beyond. Each lesson ends with an exercise to solidify learning, and users can skip ahead if they already feel comfortable with the lesson topic. W3Schools. Th...
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1. W3Schools SQL Tutorial: W3Schools provides a comprehensive tutorial on SQL that covers the basics...
W3Schools. SQL Tutorial. Free and available without registration. Database documentation: MySQL documentation PostgreSQL documentation SQLite - SQL syntax IBM DB2 SQL reference Microsoft SQL Server technical documentation Oracle Database SQL reference SQL commands quick reference: DDL: CREATE, ALTER, DROP...
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Step 1: SQL Basics As a data scientist, you will be reading from databases and analyzing data to fit your use-case. You generally don’t need to create or manipulate existing databases — companies have a separate team to do this.