The SQLServerFast Execution Plan Video Training – Block 3, basic level
The best way to fix bad performance of SQL Server queries is to look at their execution plans. The SQLServerFast Execution Plan Video Training helps you read and understand those execution plans. For more information about this video course, click here.
This is the basic level of block 3: Combining data. When a query combines data from multiple sources, then there will be operators in the execution plan to combine the relevant data. Each operator has its own benefits, its own limitations, and its own performance characteristics. This level teaches you the basic algorithm of each, which will help you understand how they impact your query performance.
A total of six chapters, with a total viewing time of 3:45:10 (1:12:34 demos).
Sold for $24.95 per video, or $119.95 if you purchase the whole level at once.
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View time: 5:02.
A short overview of the contents of each chapter in this level, with fragments from each video.
Chapter 1: Logical join types
View time: 31:59 (6:20 demos).
Logical join types: Inner Join, Outer Join, Semi Join, Anti Semi Join, probed join.
Other ways to combine data: Concatenation, Union, Sequence, Switch.|
Unexpected join type transformations.
Chapter 2: Nested Loops
View time: 40:33 (14:39 demos).
Operators covered: Nested Loops.
Performance characteristics and risks of Nested Loops.
Detailed visualization of the Nested Loops algorithm.
Rebinds and rewinds.
Properties of the Nested Loops operator.
When is a scan better than a seek?
What is predicate pushdown?
Chapter 3: Merge Join
View time: 37:57 (17:03 demos).
Operators covered: Merge Join.
Performance characteristics of Merge Join.
The cost of sorting data, and how the optimizer gets around it.
Detailed visualization of the Merge Join algorithm.
Properties of the Merge Join operator.
Chapter 4: Hash Match
View time: 46:23 (13:01 demos).
Operators covered: Hash Match.
Performance characteristics and risks of Hash Match.
Hash functions and hash tables.
Memory Grant for a Hash Match.
Detailed visualization of the Hash Match algorithm.
Properties of the Hash Match operator.
Chapter 5: Adaptive Join
View time: 33:20 (6:18 demos).
Operators covered: Adaptive Join.
Performance comparison of Nested Loops, Hash Match, and Adaptive Join.
How and when Adaptive Join necessitates conversions between row mode and batch mode.
The algorithm for Adaptive Join.
Properties of the Adaptive Join operator.
Chapter 6: Other combining operators
View time: 34:58 (18:05 demos).
Operators covered: Concatenation, Sequence, Switch.
The algorithms for Concatenation, Sequence, and Switch.
Similarities and differences between these three operators.
Relevant properties for each of these operators.
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