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SQL & Databases
Query, model, and optimize data storage systems
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💻 Technical
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+$20k-
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Medium
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SQL (Structured Query Language) is the universal language for working with relational databases. Despite being over 50 years old, SQL remains essential in 2026—80%+ of companies use SQL databases, and SQL skills add $20k-$50k to salaries across tech, data, and business roles. - Data is everywhere: Every app needs to store data