phpMyAdmin

You can create or modify tables, insert and update data, inquiries... You won't need anything else to manage your data! This is a multi-language tool released under a GPL license that is used by millions of people. So, there is a lot of information online about how to use the program. In addition to creating and editing databases, it allows you to export them in different formats (SV, SQL, XML, PDF, ISO/IEC 26300 as well as text and spreadsheet programs from OpenDocument, Word y LATEX, among others). It allows you to manage different servers, modify the permissions and privileges for each user and create relational PDF graphics of your database. Of course, you'll need to have a server that supports PHP to use phpMyAdmin.