It’s a religious war: should you define relationships or constraints in the database? What performance difference does it make, good or bad? In this lecture, you’ll learn why telling SQL Server about your data can lead to better execution plans, but worse deletes/updates on cascades. Demo scripts: Transact-SQL SELECT p.PostTypeId, COUNT(*) AS Posts FROM dbo.PostTypes…
3.4 Foreign Key and Check Constraints (16m)
It’s a religious war: should you define relationships or constraints in the database? What performance difference does it make, good or bad? In this lecture, you’ll learn why telling SQL Server about your data can lead to better execution plans, but worse deletes/updates on cascades. Demo scripts: Transact-SQL SELECT p.PostTypeId, COUNT(*) AS Posts FROM dbo.PostTypes...
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- 0.1 Prerequisites Before the Class (~4 hours)
- 0.2 How to Set Up Your Own Lab Server
- 1.2 The D.E.A.T.H. Method: Dedupe and Eliminate
- 1.3 D.E. Tools and Their Weaknesses
- 1.4a Lab 1: Dedupe and Eliminate – Introduction
- 1.4b Lab 1: Dedupe and Eliminate – Brent Does It
- 1.5 The D.E.A.T.H. Method: Tuning Indexes for Specific Queries
- 1.6a Lab 2: Tuning Indexes for Specific Queries – Introduction
- 1.6b Lab 2: Tuning Indexes for Specific Queries – Brent Does It
- 2.1 Adding Indexes with the DMVs
- 2.2 Tuning to Avoid Key Lookups and Residual Predicates
- 2.3a Lab 3: Adding Indexes with Clippy and the DMVs – Introduction
- 2.3b Lab 3: Adding Indexes with Clippy and the DMVs – Brent Does It
- 2.4 Tuning Indexes to Avoid Blocking
- 2.5a Lab 4: Solving Blocking with Indexes – Introduction
- 2.5b Lab 4: Solving Blocking with Indexes – Brent Does It
- 3.1 Filtered Indexes, Indexed Views, Computed Columns, and Partitioning
- 3.2a Lab 5: Leveraging Artisanal Indexes – Introduction
- 3.2b Lab 5: Leveraging Artisanal Indexes – Brent Does It
- 3.3 The D.E.A.T.H. Method – Heaps and Clustered Indexes
- 3.5 Tips from the Index Sommelier
- 3.6a Final Lessons and Lab 6 – Introduction
- 3.6b Lab 6: Doing the D.E.A.
- 3.6c Lab 6: Tuning Indexes for Specific Queries
- About the Lab Exercises