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How to find the instance up time

	Antonios Chatzipavlis		03 November 2019 20:37
	Installation / Upgrade / Updates
	instance uptime

Αρκετές φορές θέλεις να δεις πόσο χρόνο ένα SQL Server instance είναι ενεργό ή να δεις πότε έχει γίνει τελευταία φορά restart.

Ο ευκολότερος τρόπος για να κάνεις αυτό είναι να δεις την ημερομηνία δημιουργίας της tempdb, καθώς αυτή δημιουργείται κάθε φορά που ξεκινάει το instance.

Επειδή όμως δεν θέλεις να κάνεις πράξεις για εμφανιστεί ο χρόνος αυτός σε μια μορφή που εύκολα καταλαβαίνει κανεις, μπορείς με λίγα απλά μαθηματικά και την convert να πάρεις αυτό που θέλεις

SELECT    CONVERT(varchar, DATEDIFF(SECOND,create_date,GETDATE()) / 86400 ) + ':' +
        CONVERT(varchar, DATEADD(ms, ( DATEDIFF(SECOND,create_date,GETDATE()) % 86400 ) * 1000, 0), 114) as [instance up time (D:HH:MM:SS.MS)]
FROM sys.databases
WHERE name = 'tempdb'

//antonch

Antonios Chatzipavlis

Antonios is a Data Solutions Consultant and Trainer. He has been working in IT since 1988. In his career, he has worked as senior developer, IT Manager, Solutions Architect and IT Consultant. Since 1995 he has been devoted on new technologies and software development tools, mainly by Microsoft, either by training company staff and colleagues or assisting them in design, development and implementation as a consultant or chief developer. He has focused in Databases and Data Science since 1995. He specialized in Microsoft SQL Server since version 6.0 in areas like SQL Server Internals, Database Design and Development, Business Intelligence and in 2010 he has started working with Azure Data Platform, NoSQL databases, Big Data Technologies and Machine Learning. He is an active member of many IT communities in Greece, answering colleagues' questions and writing articles in his web site. He is the owner of SQLschool.gr which is a community portal with a lot of information about Microsoft SQL Server. He has been a Microsoft Certified Trainer (MCT) since 2000. Microsoft honored him as MVP on Data Platform due to his activities in SQL Server since 2010. He holds a large number of Microsoft Certifications and Microsoft SQL Server Certifications since version 6.5.