50 SQL INTERVIEW QUESTIONS

1. 1Write a SQL query to find duplicate records in a table using the GROUP BY clause
2. 2Use the HAVING clause to filter groups with more than one row
3. 3Apply the COUNT() function to count the number of rows in each group
4. 4Test the query with sample data to verify the results
5. 5Optimize the query for performance by indexing relevant columns

Data analysts, data scientists, and software engineers can benefit from this knowledge to improve their database management skills and prepare for technical interviews

💡 Use GROUP BY and HAVING clauses to identify duplicate records in a table

💡 Find duplicate records in a table using SQL! #SQL #database