SQL

1661 Average Time of Process per Machine

1661 Average Time of Process per Machine: This is a really interesting question where we write a compact code of…

1 year ago

Find the most common value (mode) in a specific column.

This question was asked in Interview at black rock. Read more Company: BlackRock CTC: 26LPA Source: LinkedIn SQL Interview Question Q. Find…

1 year ago

Identify employees who have never received a performance review.

This question was asked in Interview at black rock. Read more Company: BlackRock CTC: 26LPA Source: LinkedIn SQL Interview Question Q. Identify…

1 year ago

Write a query to retrieve the first order placed by each customer.

This question was asked in Interview at black rock. Read more Company: BlackRock CTC: 26LPA Source: LinkedIn SQL Interview Question Q. Write…

1 year ago

SQL Natural Join

What is SQL Natural Join? Natual Join is a type of join in SQL which combines row from 2 tables…

1 year ago

Display the cumulative percentage of total sales for each product.

This question was asked in Interview at black rock. Read more Company: BlackRock CTC: 26LPA Source: LinkedIn SQL Interview Question…

1 year ago

Write a query to group employees by age ranges (e.g., 20–30, 31–40) and count the number of employees in each group.

This question was asked in Interview at black rock. read more Company: BlackRock CTC: 26LPA SQL Interview Question Question Q.…

1 year ago

What is Pareto Principle

The Pareto Principle, commonly known as the 80/20 rule, argues that 80% of the results are achieved with 20% of…

1 year ago

Running Total for Different Genders: Write an SQL query to find the total score for each gender at each day

This question was asked in Facebook interview, Ask is to provide Running Total for Different Genders. Source: LeetCode Difficulty: Medium…

1 year ago

SQL LAG function explained!!

Understanding the SQL LAG Function (With Examples) SQL LAG function is a powerful tool that enables you to access data…

1 year ago