It can alike be used as tool to ensure that there is a possibility of cross-index of demographic and clinical study mingled with different facilities inwardly the health care system (Sharpe , 1999 ) On the other attain , Primary Key refers to a set of fields that contains a specific or earlier a unique care for for each record identifies the record and withal well indexed . A Primary Key essential(prenominal) have the following properties it must perch stable , it must be existing when creating a record , it must be unique for every record , and also its value must be such that it cannot change . In or der to lay down a relationship between one ! table and another...If you demand to get a wide of the mark essay, order it on our website: OrderCustomPaper.com
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