Hi, Colin

If you're looking for information on the Moodle database schema, have a look at http://docs.moodle.org/dev/Moodle_architecture#The_Moodle_database and http://docs.moodle.org/dev/Database_schema_introduction

Alternatively, if you meant Totara, there are links to the Totara database schema under the Community Forums - Resources section. For 2.2, have a look at https://dev.totaralms.com/docs/schemaspy/totara-2.2/

Cheers

Tom