R: Combine rows in same data.frame
5136
How to sum a variable by group
40942
Conditional merge/replacement in R
31844
How to call a function that returns multiple rows and columns in a data.table?
144100
How to merge two files in corresponding row?
27240
How to mix pairs of rows without JOIN (in a temporary table)?
6090
Transposing rows and columns
79310
Transpose a single column to multiple rows
44985
Simultaneously merge multiple data.frames in a list
154797
Oracle Combine several columns into one
156387
Merge two rows in SQL
147397
How do I combine two data-frames based on two columns?
31368
interleave rows of matrix stored in a list in R
38915
Pivot rows into multiple columns
141208
subset a data.frame with multiple conditions
53048
placing mean,total and max together in a table in r
155361
Split data.frame by value
6158
How to resample in R without repeating permutations?