Suppose I have this rows in a table
hello
guys
how
are
you?
My expected result is a single row like this one:
hello, guys, how, are, you?
What can I do?
As GordonLinoff mentioned in the comment, GROUP_CONCAT works.
I don't know your table names or table structures, but you can do something like:
SELECT GROUP_CONCAT(col_name) FROM table WHERE ...
You can read about it here.
GROUP_CONCAT().