Calculating Business Days of a Month Excluding Holidays in SQL Using a Custom Function

Understanding DB Update Query Performance Optimization Strategies for Improved Database Performance

How to Get Next Row's Value from Date Column Even If It's NA Using R's Lead Function

Retrieving Minimum Date for Each Item Key in Two Tables While Excluding Duplicates

Slicing Rows from a Pandas DataFrame Based on Date Indexes: A Comprehensive Guide

Calculating the Difference Between Same Months in Different Years in R: A Step-by-Step Guide

Handling Missing Day Values in Character String Dates Using R's zoo Package

Efficiently Converting Date Columns in R's data.table Package Using Regular Expressions, anytime, and lubridate Packages