Blockchain technology has already revolutionized finance thanks to Bitcoin. Now it's disrupting other areas, including the realm of data protection. Learn how blockchain is now being used to authenticate backup files and keep them safe from hackers.
ID name emp_id 1 Sally 456 2 unknown 457 3 Kate null 4 unknown 890 5 James null
IF EXISTS (SELECT 1 FROM tblEmp WHERE name = 'Kate') BEGIN UPDATE tblEmp SET emp_id = 767 WHERE name = 'Kate' ELSE INSERT INTO tblEmp Set emp_id = 767, name = 'Kate' END
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