Database export
From MoodleDocs
The list template can be used to export your database as a CSV file in the following way. It is assumed that you have a database with N fields, and that in this example the fields are named field1, field2 ... until fieldN.
Header
In the header create a comma separated list of the field names
field1,field2,...,fieldN
Repeated entry
In the repeated entry create a comma separated list of the field tags
[[field1]],[[field2]],...,[[fieldN]]
Save the template!
Export
To export, simply select the View List tab and all your data will be in the CSV format. By default only 10 records are displayed, but this can be increased. Copy and paste to your required tool.