QOMO QRF300 User Manual - Manual (Page 86)

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3.5.4 Database Management:
The QClick system database management will perform some basic database management
operations including database backup and recovery. Additionally, you can also perform basic data
clean up such as deleting session test data, deleting students, teachers, classes, and subjects
records. Please use caution in backing up important data and information before using the data
clean up, once the data or records are purged, there is no way to rollback deleted information.