Can't Backup Database - "Failed with exit code 1" (WAMP Server)
Following up on your last comment:


  So I guess my final question is: how can I either manually create the required file (which is missing) or amend the query?


You can completely override Craft's default backup command by specifying it in the backupCommand config setting.

Craft will attempt to execute whatever is in there when it goes to perform a backup.