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Move a database file (data or log file) to another location

Antonios Chatzipavlis

Αρκετές φορές έχω ερωτηθεί για το πώς μπορεί κάποιος να μεταφέρει μια βάση ή ένα αρχείο της (data / log file) από ένα σημείο (disk/folder/…) σε άλλο.

Η εύκολη απάντηση που δίνω καθώς δεν είναι πάντα εύκολο να γνωρίζω τα skills του ερωτώμενου είναι detach & attach database. Αρκετά ξεκάθαρή διαδικασία και χωρίς ίχνος παρερμηνείας.

Παρόλα αυτά όμως υπάρχει και άλλος τρόπος που σε κάποιες περιπτώσεις είναι λίγο πιο γρήγορος αλλά πρέπει να κάνεις περισσότερα βήματα υλοποίησης.

Το τρόπος αυτό είναι ο παρακάτω όπως δείχνω και στο παράδειγμα μου

  • Με ALTER DATABASE λες που θέλεις να πάει το αρχείο
  • Με ALTER DATABASE κάνεις OFFLINE την βάση
  • Κάνεις copy το αρχείο από παλαιό σημείο στο νέο
  • Με ALTER DATABASE κάνεις ONLINE την βάση
USE [master]
GO

-- Sample database
CREATE DATABASE [DemoDB]
 CONTAINMENT = NONE
 ON  PRIMARY 
( NAME = N'DemoDB_data', FILENAME = N'C:\SQLData\DemoDB_data.mdf'  )
 LOG ON 
( NAME = N'DemoDB_log', FILENAME = N'C:\SQLData\DemoDB_log.ldf' )
GO

-- STEP 1
alter database DemoDB
modify file (name='DemoDB_log', filename='C:\SQLData\a\DemoDB_log.ldf');

-- STEP 2
alter database DemoDB set offline;

-- STEP 3
-- copy file 

-- STEP 4
alter database DemoDB set online;

/*antonch*/


Antonios Chatzipavlis

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.


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