1. Using Common Table Expressions
Ben Galluzzo
SQL Saturday #395 – Baltimore - BI Edition 2015

2. Introduction
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SQL Saturday #395 – Baltimore - BI Edition 2015

3. Introduction
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SQL Saturday #395 – Baltimore - BI Edition 2015

4. CTE Introduction
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SQL Saturday #395 – Baltimore - BI Edition 2015

5. Using Common Table Expressions
CTE Overview
CTE Structure
Uses
Basics (demo)
SSRS Data-Driven Subscriptions (demo)
Rolling Period (demo)
Resources
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SQL Saturday #395 – Baltimore - BI Edition 2015

6. CTE Overview Characteristics can be used in same fashion as subquery
similar to views (disposable views)
recreated every time with each use
can be used to simplify complex queries
sometimes can improve maintainability of code
can reference itself (becomes recursive)
unable to access main query
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SQL Saturday #395 – Baltimore - BI Edition 2015

7. CTE Syntax
;WITH <cte_name> AS ( [query] ) SELECT [statement] FROM <cte_name>;
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SQL Saturday #395 – Baltimore - BI Edition 2015

8. DEMO CTE – Basic Examples 8 |
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SQL Saturday #395 – Baltimore - BI Edition 2015

9. CTE – SSRS Data-Driven Subscription
DEMO
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SQL Saturday #395 – Baltimore - BI Edition 2015

10. DEMO CTE – Rolling Periods 10 |
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SQL Saturday #395 – Baltimore - BI Edition 2015

11. Resources WITH common_table_expression CTE Basics
CTE Basics
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SQL Saturday #395 – Baltimore - BI Edition 2015

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SQL Saturday #395 – Baltimore - BI Edition 2015

13. Using Common Table Expressions
Ben Galluzzo
SQL Saturday #395 – Baltimore - BI Edition 2015