Joining Tables with Recent Date for Each Row Then Weighted Averaging

Mastering Elasticsearch Joins: A Guide to Horizontal Scaling and Performance Optimization

Finding Matching Records in TEST_FILE Using Distinct Values from TEST_FILE1

Joining Two Tables in Pandas with Some Conditions in Columns

Converting the Index of a Pandas DataFrame into a Column

Resample Data Table with Irregular Time Intervals Using R's data.table Package

Merging Datasets in R Using Partial String Matches

PostgreSQL Join Tables on Data Range