Can someone please answer to the below queries:

What is the maximum number of records fetched by Database.query()  and Database.getQueryLocator?

I know that SOQL fetches only 50,000 records, but what about the above mentioned ones. I'm passing a query string in the Database.query() to fetch the records. I wanted to know the limitation of the Database.query()  and Database.getQueryLocator. I'm using this in the Apex controller as of now.