The best replacement for merge is rebase.

The best alternatives to merge are rated as following:
★★★★★  rebase
★★★  persist
★★★  rebase git
★★★  acquire
★★★  update
★★  merge join
★★  saveorupdate
★  union arcgis
★  update hibernate
★  samsung mesmerize
★  htc desire
★  yield
★  flatten
★  append stata
★  not to merge
★  join
★  consolidate
★  combine
★  merge
★  in lost planet 2
★  upsert
★  update performance
★  transactional replication
  mesmerize
  join sql
  flatten photoshop
  union all ssis
  hash join
  early merge
  update oracle
  blend
  append
  cascade merge
  bulk collect
  union all
  split pdf

Your alternative for merge is not listed? Suggest!
Speaking about merge, one probably shouldn't forget about git.

Other search terms related to merge and their ratings are:
★★★★★ git
★★★ cte
★★ remote branch
★ attachment
output clause
You have in mind a companion for merge and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of merge in all years. Click on graph for more.
merge
rebase
persist