It's easy to redirect simple page urls from one location to another but query strings redirection can make you pull your hair.
This is how I redirected simple pages:
Redirect /page.php http://technooze.com/new-page
For mass redirecting of pages after folder path:
RedirectMatch ^/cms/(.*).php$ http://technooze.com/blog/$1
For query string 301 redirect.
RewriteEngine On
RewriteCond %{REQUEST_URI} ^/page/$
RewriteCond %{QUERY_STRING} ^id=about$
RewriteRule ^(.*)$ http://technooze.com/about-us? [R=301,L]
RewriteCond %{REQUEST_URI} ^/page/$
RewriteCond %{QUERY_STRING} ^type=product&id=1$
RewriteRule ^(.*)$ http://technooze.com/shop/caps? [R=301,L]
I created new page that would get product id and redirect to proper product page, so updated above code to:
RewriteCond %{REQUEST_URI} ^/page/$
RewriteCond %{QUERY_STRING} ^type=product&id=([0-9]*)$
RewriteRule ^(.*)$ http://technooze.com/shop/load=%1? [R=301,L]
And I redirected all other remaining pages to base url by adding below line after above conditions.
RewriteRule ^(.*)$ http://technooze.com/ [R=301,L]