Elephants can also drink up to 50 gallons of water a day about as much as a standard bathtub holds. Elephants are a keystone species that influence the composition of their environment while often benefiting other species.
Log Sequence Number. Every record in SQL Server transaction log has its own log sequence number or LSN. Log sequence numbers are ordered in such a way that changes related to the record with greater LSN occurred after the changes related to records with smaller LSN. Each backup that is set in SQL Server has FirstLSN and LastLSN values.
Medical Record Number. A unique patient identifier, as required by HIPAA, which is provided by a healthcare provider or healthcare system. Patients do not have a universal MRN as they are provided separately by different healthcare systems. An MRN will not change throughout all of the care received within a health system - unlike an account (called a HAR in Epic) or visit number (called a CSN in Epic). Hospitals typically use MRN, in conjunction with SSN, as unique patient identifiers.