How to Materialized view in SQL Server?

1.2K Asked by anurag_4280 in Salesforce , Asked on Jul 12, 2021

Have a bit of glitches from the time I was using SQL Server back in 2006 and the many other databases I played with (and which I have not touched since then). I need to create a materialized view to quickly get access to the data without overloading the DB but also to pull them what was made static by the time the view was created. SQL Server seems to support the materialized views with the Indexed views, but to be created these require among the other thing the following:the WITH SCHEMABINDING constructa clustered INDEX Failing in that, my understanding is the view is not auto refreshing, which is probably what I need? My goal is to get a view, that I can refresh whenever I need. So far I created a Materialized view in the SQL 2005 instance I have access to with the following statement: CREATE MATERIALIZED VIEW xys AS SELECT 123 FROM X WHERE ... GROUP BY Any memory refresher? How sql server materialized view?

Answered by Angela Baker

Thinking about the requirements:
"quickly get access to the data without overloading the DB"
"pull them what was made static [at] the time the view was created"

Especially the part about the data being static captured at a moment in time, I doubt a view is what you want. I think you may want something more like CDC, but that wasn't introduced until SQL Server 2008. For SQL Server 2005, a database snapshot may meet your needs.

Dominique's answer also potentially an option. There are multiple ways to fulfil above two requirements. Another example might be to create a stored procedure as shown below and schedule via SQL Server Agent. E.g. assuming source table:

CREATE TABLE SourceTable ( C1 [datatype1] PRIMARY KEY , C2 [datatype2] , C3 [datatype3] )

and a "Snapshot table" created to match:

CREATE TABLE SnapshotOfSourceTable ( C1 [datatype1] PRIMARY KEY , C2 [datatype2] , C3 [datatype3] )

then you could do something like this:

CREATE PROCEDURE dbo.UpdateSnapshotOfSourceTable AS BEGIN BEGIN TRAN BEGIN TRY DELETE FROM SnapshotOfSourceTable WHERE C1 NOT IN ( SELECT C1 FROM SourceTable ) UPDATE Snap SET Snap.C2 = Source.C2 , Snap.C3 = Source.C3 FROM SnapshotOfSourceTable [Snap] INNER JOIN SourceTable [Source] ON Snap.C1 = Source.C1 INSERT INTO SnapshotOfSourceTable (C1, C2, C3) SELECT C1, C2, C3 FROM SourceTable WHERE C1 NOT IN ( SELECT C1 FROM SnapshotOfSourceTable ) COMMIT END TRY BEGIN CATCH DECLARE @ErrorMessage NVARCHAR(4000); DECLARE @ErrorSeverity INT; DECLARE @ErrorState INT; SELECT @ErrorMessage = 'Error when attempting to update snapshot table from source: ' + ERROR_MESSAGE(), @ErrorSeverity = ERROR_SEVERITY(), @ErrorState = ERROR_STATE(); RAISERROR (@ErrorMessage, -- Message text. @ErrorSeverity, -- Severity. @ErrorState -- State. ) WITH LOG; ROLLBACK END CATCH END

Here are the Permissions for sql server materialized view:
CREATE VIEW permission in the database.
SELECT permission on the base tables of the materialized view.
REFERENCES permission on the schema containing the base tables.
ALTER permission on schema containing the materialized view.

How to Materialized view in SQL Server?

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