How to assign values from one DF to another, based on equality of values in other column?
15825
How to join (merge) data frames (inner, outer, left, right)
143114
Counting unique addresses from a list in column A if criteria for column B is met
16888
Automatically update field value in one column based on change to another column in same table?
44910
Update values in one table based on contents of another
65699
'IF' in 'SELECT' statement - choose output value based on column values
7274
Calculate group mean (or other summary stats) and assign to original data
135319
Convert the values in a column into row names in an existing data frame
38616
Clusering based on categorical variables?
22518
intersection of two files according to the first column
32937
Combine two data frames by rows (rbind) when they have different sets of columns
14066
Pivoting of data using two columns
84665
Sum of rows based on column value
60430
How to match all words of one column against words in another column
3455
unique combinations of values in selected columns in pandas data frame and count
59331
splitting file based on values in specific column
110212
Assign same value to multiple variables at once?
63123
Excel: identifying if all values in a row are not equal