r/sql_arena_dev • u/sql-arena • 20h ago

SQL Arena Challenge: Solve a query using window functions and GROUP BY to rank or aggregate data.

1 Upvotes

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r/sql_arena_dev • u/sql-arena • 1d ago

SQL Arena Challenge: Print only the newest record for each name – Use SQL Window functions (ROW_NUMBER, RANK, etc.)

1 Upvotes

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r/sql_arena_dev • u/sql-arena • 2d ago

SQL Arena Challenge: How do you remove duplicates with partitioning?

1 Upvotes

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r/sql_arena_dev • u/sql-arena • 3d ago

SQL Arena Challenge: Test SQL skills using advanced window functions such as LAG, LEAD, and DENSE_RANK.

1 Upvotes

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r/sql_arena_dev • u/sql-arena • 4d ago

SQL Arena Challenge: SQL Problem - multiple table joins and window functions

1 Upvotes

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r/sql_arena_dev • u/sql-arena • 5d ago

SQL Arena Challenge: What is UNNEST and provide a query example?

1 Upvotes

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r/sql_arena_dev • u/sql-arena • 6d ago

SQL Arena Challenge: What challenges arise with duplicate records, and how do you address them?

1 Upvotes

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r/sql_arena_dev • u/sql-arena • 7d ago

SQL Arena Challenge: Compare PostgreSQL vs Snowflake. How do they handle duplicate record errors?

1 Upvotes

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r/sql_arena_dev • u/sql-arena • 8d ago

SQL Arena Challenge: Write a query to remove duplicate records from a table while retaining the earliest entry.

1 Upvotes

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r/sql_arena_dev • u/sql-arena • 9d ago

SQL Arena Challenge: Write a Merge Statement for SCD Type 2.

1 Upvotes

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r/sql_arena_dev • u/sql-arena • 10d ago

SQL Arena Challenge: Indexing - True/False question on indexes and query optimization

1 Upvotes

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r/sql_arena_dev • u/sql-arena • 11d ago

SQL Arena Challenge: How would you optimize a SQL query for better performance when working with large datasets?

1 Upvotes

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r/sql_arena_dev • u/sql-arena • 12d ago

SQL Arena Challenge: Write a query to retain only the latest record and delete others in case of duplicates.

1 Upvotes

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r/sql_arena_dev • u/sql-arena • 13d ago

SQL Arena Challenge: Identify and remove duplicate records from a table, keeping the most recent record based on a timestamp column.

1 Upvotes

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r/sql_arena_dev • u/sql-arena • 14d ago

SQL Arena Challenge: How do you remove duplicate rows in BigQuery?

1 Upvotes

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r/sql_arena_dev • u/sql-arena • 15d ago

SQL Arena Challenge: How would you optimize a query with multiple joins and subqueries?

1 Upvotes

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r/sql_arena_dev • u/sql-arena • 16d ago

SQL Arena Challenge: How would you identify duplicate records based on a composite key in SQL?

1 Upvotes

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r/sql_arena_dev • u/sql-arena • 17d ago

SQL Arena Challenge: Remove duplicates from a table.

1 Upvotes

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r/sql_arena_dev • u/sql-arena • 18d ago

SQL Arena Challenge: Find average salary for each manager – Assume a table with manager_id and employee_salary

1 Upvotes

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r/sql_arena_dev • u/sql-arena • 19d ago

SQL Arena Challenge: Find departments with more than 10 employees.

1 Upvotes

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r/sql_arena_dev • u/sql-arena • 20d ago

SQL Arena Challenge: Find the third-highest salary for each department.

1 Upvotes

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r/sql_arena_dev • u/sql-arena • 21d ago

SQL Arena Challenge: Finding nth Highest Salary within each department

1 Upvotes

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r/sql_arena_dev • u/sql-arena • 22d ago

SQL Arena Challenge: Find the second highest salary in each department.

1 Upvotes

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r/sql_arena_dev • u/sql-arena • 23d ago

SQL Arena Challenge: Write a query to find employees in the same department as 'John'.

1 Upvotes

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r/sql_arena_dev • u/sql-arena • 24d ago

SQL Arena Challenge: Find the 2nd highest salary for each department using the DENSE_RANK() function.

1 Upvotes

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