Question : How to do incremental backups on BE 12.5

We currently do full backups on our servers. On one server, I would like to do incremental backups. How would I go about doing that on Backup Exec 12.5?

Will I keep the current Full backup and add also add an incremental backup?

Thanks

Answer : How to do incremental backups on BE 12.5

Actually, this appears to the be the correct SQL:
   ISNULL(MAX(CAST(SUBSTRING(chainlink, 6, 6) AS int)), 0)