10 SQL Concepts Every Data Analyst Should Master π
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SELECT, WHERE, ORDER BY β Core of querying your data
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JOINs (INNER, LEFT, RIGHT, FULL) β Combine data from multiple tables
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GROUP BY & HAVING β Aggregate and filter grouped data
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Subqueries β Nest queries inside queries for complex logic
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CTEs (Common Table Expressions) β Write cleaner, reusable SQL logic
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Window Functions β Perform advanced analytics like rankings & running totals
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Indexes β Boost your query performance
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Normalization β Structure your database efficiently
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UNION vs UNION ALL β Combine result sets with or without duplicates
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Stored Procedures & Functions β Reusable logic inside your DB
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