Plotalot is easy to use, but there is no getting away from the fact that you need to use SQL (Structured Query Language). This guide includes a basic introduction to SQL and contains many examples that should help you, but learning SQL does take time. SQL can become very complex, although luckily, here, we are only concerned with "Select" queries. SQL is a huge subject and there are many references on the web. The ultimate reference guide for MySql is the MySql Documentation at http://dev.mysql.com/doc/
Please note that we do not usually provide support for SQL problems, although we are always interested to gather examples to add to this guide.