nopCommerce provides basic reports in the admin panel. Beside this, sometimes we need more reports to analyze data. So the SQL Manager plugin will do this for you. You can write a custom query and save it. After running the query you can show the report. The main feature of this plugin is you can export these reports to Excel. Another feature is you can write a query, run the query and view the result from this plugin.
This plugin only supports MSSQL