Every once in a while, an event might happen that corrupts a database and a database backup is required. If there is at least a complete database backup then the corrupted database is recoverable. However, if this backup is corrupted then a point in time restore is required.
Note
A point in time recovery is a method to recover a database to any point in time since the last database backup.
SQL Server has the ability to recover the data point in time from the last committed transition before the system crashed.
Incremental backups require the database to run on full recovery mode. This means that every transaction will be stored on the transactional logs and it must be backed up in order to be overwritten. Depending on the load, some transactional logs can grow up to 100 GB if they are not backed up frequently.
Point in time backup and restore can be performed with Management Studio and PowerShell.