What is SQL (Structured Query Language)?
Standard language for managing relational databases, used for querying and manipulating data. Essential for data analysis. Used by analysts and developers. Companies use SQL to analyze business data and build applications.
Essential SQL skills include writing SELECT statements, joining tables, and understanding database relationships. Focus on data filtering, aggregation functions, and query optimization for efficient data retrieval and analysis.
SQL enables data analysis through powerful querying capabilities, data manipulation, and statistical calculations. It supports complex data operations, reporting, and business intelligence through structured database queries.
SQL best practices include proper indexing, query optimization, and clean code structure. Focus on efficient joins, proper table design, and performance optimization for large datasets.
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