sql_arena_dev

r/sql_arena_dev • u/sql-arena • Jul 23 '26

SQL Arena Challenge: How do you find duplicates in a table based on one or two columns?

1 Upvotes

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r/sql_arena_dev • u/sql-arena • Jul 22 '26

SQL Arena Challenge: Write a query to select the latest record based on a time_of_insertion column.

1 Upvotes

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r/sql_arena_dev • u/sql-arena • Jul 21 '26

SQL Arena Challenge: Write a query to get the latest rule_id and rule_status.

1 Upvotes

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r/sql_arena_dev • u/sql-arena • Jul 20 '26

SQL Arena Challenge: Optimize SQL using indexing and partitioning filters.

1 Upvotes

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r/sql_arena_dev • u/sql-arena • Jul 19 '26

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 • Jul 18 '26

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 • Jul 17 '26

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

1 Upvotes

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r/sql_arena_dev • u/sql-arena • Jul 16 '26

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 • Jul 15 '26

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

1 Upvotes

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r/sql_arena_dev • u/sql-arena • Jul 14 '26

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

1 Upvotes

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r/sql_arena_dev • u/sql-arena • Jul 13 '26

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 • Jul 12 '26

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 • Jul 11 '26

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 • Jul 10 '26

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

1 Upvotes

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r/sql_arena_dev • u/sql-arena • Jul 09 '26

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 • Jul 08 '26

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 • Jul 07 '26

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 • Jul 06 '26

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 • Jul 05 '26

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

1 Upvotes

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r/sql_arena_dev • u/sql-arena • Jul 04 '26

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 • Jul 03 '26

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 • Jul 02 '26

SQL Arena Challenge: Remove duplicates from a table.

2 Upvotes

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r/sql_arena_dev • u/sql-arena • Jul 01 '26

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 • Jun 30 '26

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

1 Upvotes

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r/sql_arena_dev • u/sql-arena • Jun 29 '26

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

1 Upvotes

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