Formula Generator

How can I optimize a Python algorithm that sorts a large list of numbers using the merge sort method without escalating the time and space complexity?

Can you provide a SQL query that will identify duplicate entries in a database table without utilizing the 'GROUP BY' clause?

What is the most efficient way to manipulate a large data frame in R to convert categorical variables into dummy variables?

How can I utilize DAX in Power BI to create a cumulative total column for a measure that has been filtered by another column?

In Microsoft Excel, how can I create a macro that can copy a range of cells from one worksheet and paste them into another worksheet based on a specific criterion?

What is the best approach to implement multiprocessing in Python for a computationally intensive task, and how does it improve code efficiency?

How can I write a SQL trigger that updates a 'Last Modified' column whenever a row in the database table is updated?

In R, how can you implement a linear regression model on a large dataset, and then interpret and validate the results?

How can I use DAX to create a dynamic, rolling 12-month sales report that automatically updates with the current month in Power BI?

In Microsoft Excel, can a VBA script be created that automatically formats cells based on their content, for example, changes the cell color to red if the content is negative?