The presentation by Aaron Buma focuses on database views, highlighting their definitions, options, and data manipulation techniques. It discusses the characteristics of views, including their ability to serve as virtual tables, available options like encryption and schemabinding, and the rules for indexing views. The document also emphasizes the limitations of data manipulation on multi-table views and provides resources for further information.

1. Views
Presentation by Aaron Buma
Dev Lead and DBA

2. Session Overview
•What are they?
•Options
•Manipulating Data
•Indexing Views
•Demos

3. What is a View?
•A “virtual table” you can reference in a query.
•Can be used as an abstraction layer between user and
tables (“base” tables)
•Can have up to 1024 columns
•Modifying:
– Alter retains permissions (like other objects)
– Drop/Create removes permissions

4. View Options
•Encryption – Users can’t:
– Script out object
– Use sp_helpText ‘object’ to view source
•Schemabinding
– Creates a dependency between Base tables and View
– Can’t alter referenced Base tables

5. Manipulating Data
• Can only happen against one base table at a time
• Updating
– Only records that are returned in the view can be affected
• Inserting
– Not allowed on a multi-table view
• Use an “INSTEAD OF INSERT” trigger on view to re-route fields
• Deleting
– Not allowed on a multi-table view

6. Indexing Views
• Only on Enterprise and Developer SQL Server
• Materialized View
– Physically copies the base table(s) data
– “Standard” views are instruction sets on how to
pull data from base tables
– “Partitioned” views have base tables in
different databases

7. Indexing Views - Rules
• First index must be
UNIQUE & CLUSTERED
• SCHEMABOUND
required
• Base tables only, no
nested views
• Same schema and
database as base tables
• Two-Part names
required
• Fields must be
deterministic

8. DEMOS

9. Review
Presentation Recording, Slides and Scripts
– http://www.AaronBuma.com/2016/01/Views/
• Contact:
– Aaron.Buma@EmergencyReporting.com

10. Review
Presentation Recording, Slides and Scripts
– http://www.AaronBuma.com/2016/01/Views/
• Contact:
– Aaron.Buma@EmergencyReporting.com