Sum multiple columns by group
121414
Aggregate data in R
129336
sum all values for table column based on class
14066
Pivoting of data using two columns
68123
How to get cumulative sum
139237
How to sum over duplicates?
53276
Group data and plot multiple lines
79310
Transpose a single column to multiple rows
59327
How can I use sum() function for a list in Python?
24411
Aggregate / summarize multiple variables per group (e.g. sum, mean)
67996
Calculating cumulative sum for each row
31517
Using awk to sum the values of a column, based on the values of another column
67634
Grouping by total length of elements grouped
17407
Multiple aggregations of the same column using pandas GroupBy.agg()
58928
Excel, want to read a column and sum up the values that match in another column
117173
Sum the values in a column except the header
136924
How can I get the sum of multiple datetime values?
39758
Collapse / concatenate / aggregate a column to a single comma separated string within each group