How to correctly set the rewrite rule?

Question

Nginx

There is a link like
domen.ru/?xxx=zzz&a=123
And the only thing that changes in this link is the last digits.
How can I change the rules through rewarite to something like:
domen.ru/qqq=123 ?

Answer 1

a question the answer.

# 301 --- http://домен.ру/?xxx=zzz&a=123 => http://домен.ру/qqq=123
RewriteCond %{QUERY_STRING} (^|&)xxx=zzz($|&)
RewriteCond %{QUERY_STRING} (^|&)a=123($|&)
RewriteRule ^$ /qqq=123? [L,R=301]