SQL SERVER - Making Table Read Only via FileGroup - SQL Authority with Pinal Dav...
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SQL SERVER – Making Table Read Only via FileGroup
Earlier I wrote the blog post SQL SERVER – Making Filegroup Read Only, and my regular client of Comprehensive Database Performance Health Check asked me a follow-up question on the practical use of making the filegroup read only. Well, the primary reason, we make the table read-only is for making table read only.
When you have a table on the filegroup which is read only, the table can’t be modified anymore and it also becomes read only. Here is the complete script for your experiment.
USE [master]
GO
-- Step 1: Add FileGroup
ALTER
DATABASE
[SQLAuthority]
ADD
FILEGROUP [ReadOnlyFG]
GO
-- Step 2: Add File to FileGroup
ALTER
DATABASE
[SQLAuthority]
ADD
FILE
(
NAME
= N
'ReadOnlyFile'
, FILENAME = N
'D:\data\ReadOnlyFile.ndf'
)
TO
FILEGROUP [ReadOnlyFG]
GO
-- Step 3: Create Table and populate it
USE [SQLAuthority]
GO
CREATE
TABLE
RegularTable (ID
INT
)
ON
[ReadOnlyFG]
GO
INSERT
INTO
RegularTable (ID)
VALUES
(1), (2), (3)
GO
-- Step 4: Make FileGroup ReadOnly
USE master
GO
ALTER
DATABASE
[SQLAuthority]
MODIFY
FILEGROUP [ReadOnlyFG] READONLY
GO
-- Step 5: Test the ReadOnly Property
USE [SQLAuthority]
GO
INSERT
INTO
RegularTable (ID)
VALUES
(4), (5), (6)
GO
-- Step 6: (Optional) Make FileGroup ReadWrite
USE master
GO
ALTER
DATABASE
[SQLAuthority]
MODIFY
FILEGROUP [ReadOnlyFG] READWRITE
GO
Let me know what you think about it. If it is still not clear, I will be happy to build a video on the same topic so it is easy to understand. You can also make the table read only with the permissions, but personally, I find that method bit more complicated and also that does not prevent you from changing the table.
Well, that’s it for today. If you liked this video, please do not forget to subscribe to my YouTube Channel – SQL in Sixty Seconds.
Here are my few recent videos and I would like to know what is your feedback about them.
Reference: Pinal Dave (http://blog.SQLAuthority.com)
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