what's difference about git branch -d and git branch -D

Question

I an newer about git. after I merge my branch from another branch, I found something wrong. Now my status is I have commit these changes from merging, but not push into the

Answer 1

You can find the answer using git help branch. (Because it is regarding the git branch command.)

There you find:

-d
--delete

    Delete a branch. The branch must be fully merged in its upstream branch, or in HEAD if no upstream was set with --track or --set-upstream.
-D

    Delete a branch irrespective of its merged status.

Usually you do git branch -d. - If git complains, you should think again and if you are sure you do not need any commits from that branch anymore you can do git branch -D to delete it anyway.

Answer 2

The -D is a force-delete and the -d will provide a warning before deleting if the branch has not been merged into its upstream branch