I'm getting a value via join from 2 tables. Can I show it in merge format, not concat?

I'm getting a value via join from 2 tables. Can I show it in merge format,
not concat?

Is there a way to merge the table value, not concatenating it, in mysql? I
am getting the value via join. It is showing multiple of rows. Is there a
way to merge one table row into the second table row so that the rows
never repeat?