Combine two pandas Data Frames (join on a common column)
5265
Pandas Merging 101
100133
Sum up rows from different data files
3455
unique combinations of values in selected columns in pandas data frame and count
26303
Add a new column between other dataframe columns
157682
How do I operate on a DataFrame with a Series for every column
59789
How to join two Style[]d strings
135182
Merge intersecting polygons into one which are part of the same feature
25072
Merging CSV (single line per row) files without losing the header line
106330
Merge files based on matching of first column
17407
Multiple aggregations of the same column using pandas GroupBy.agg()
66251
Find complement of a data frame (anti - join)
45771
Add (insert) a column between two columns in a data.frame
89041
Identify records in data frame A not contained in data frame B
27240
How to mix pairs of rows without JOIN (in a temporary table)?
46441
Combine column from multiple rows into single row
111433
replace column of a csv file with column from another file
52175
Adding new column to existing DataFrame in Python pandas