Lesser-Known SQL Functions You Should Master for Interviews

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Learn CONCAT_WS() to effortlessly combine strings with a specified separator, streamlining your data presentation.

1. CONCAT_WS()

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Explore COALESCE() to replace NULL values with meaningful alternatives, ensuring your queries remain robust and error-free.

2. COALESCE()

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Dive into ROW_NUMBER() to assign unique numerical identifiers to rows, enabling precise sorting and analysis.

3. ROW_NUMBER()

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Master STRING_AGG() to concatenate string values within a group, simplifying complex data summaries and reports.

4. STRING_AGG()

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Harness the power of LEAD() and LAG() to access future and past row values, facilitating insightful trend analysis.

5. LEAD() and LAG()

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Discover the versatility of WINDOW functions for advanced analytics, providing a dynamic view into specific data subsets.

6. WINDOW Functions

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Unleash the potential of JSON functions to parse, manipulate, and extract valuable information from JSON-formatted data.

7. JSON Functions

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Armed with these lesser-known SQL functions, you're ready to ace interviews and demonstrate your expertise in handling diverse data challenges.

8. Outro

This comprehensive guide will help you prepare for all aspects of the interview process.  Don't miss out on your next opportunity!

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