MS SQL Server Views Question:
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Explain Partitioned view?
Answer:
Partitioned view joins the horizontally portioned data. This data may belong to one ore more servers. It makes the data appear as one table. A portioned view can either be local or distributed. A local portioned view resides on the same instance of the SQL server while the distributed may reside on a different server.
Syntax:
The view is then created by UNIONing all the tables and an updateable partitioned View results
Server 1 :
CREATE TABLE Customer1 (CustomerID INTEGER PRIMARY KEY CHECK (CustomerID BETWEEN 1 AND 32999), ... -- Additional column definitions)
Similar tables created for Server 2 and 3
Partitioned view for server 1
CREATE VIEW Customers AS
SELECT * FROM CompanyDatabase.TableOwner.Customer1
UNION ALL
SELECT * FROM Server2.CompanyDatabase.TableOwner.Customer2
UNION ALL
SELECT * FROM Server3.CompanyDatabase.TableOwner.Customer3
Syntax:
The view is then created by UNIONing all the tables and an updateable partitioned View results
Server 1 :
CREATE TABLE Customer1 (CustomerID INTEGER PRIMARY KEY CHECK (CustomerID BETWEEN 1 AND 32999), ... -- Additional column definitions)
Similar tables created for Server 2 and 3
Partitioned view for server 1
CREATE VIEW Customers AS
SELECT * FROM CompanyDatabase.TableOwner.Customer1
UNION ALL
SELECT * FROM Server2.CompanyDatabase.TableOwner.Customer2
UNION ALL
SELECT * FROM Server3.CompanyDatabase.TableOwner.Customer3
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