Grouping by Column and Selecting Value if it Exists in Any Columns in Pandas DataFrame

Understanding NSDateFormatter in iOS Development: Best Practices for Formatting Dates

Calculating Business Days Between Two Dates Using Pandas: A Comparison of Methods

Understanding Oracle Date Formats for Efficient Querying of Tables Less Than or Equal To Specific Dates and Times

Retrieving Data from YTD to Last Sunday: A MySQL Solution

Optimizing Date Ranges in SQL Using Calendar Tables

Updating Records with Recent Dates: Best Practices for SQL Updates

Converting Factor to Date without creating NA's in R

Understanding Date Formats in R and the Need for Customization

Effective Date Range Queries with Fuzzy Joining in R