Plan Comparison

Max Vernon looks at plan comparison in SQL Server Management Studio:

The table has 10,000,000 rows. I’ve create a non-clustered columnstore index on the table, which I’ll talk about in a future post. I’ve included it here because it provides a succinct difference in the two plans.

To compare the plans visually, side-by-side, you need to save the first plan by right-clicking on the plan window, clicking “Save Execution Plan As…”, and specifying a filename. Next, right-click on the plan window, and choose “Compare Showplan”:

I’ve only used this once or twice, but it is an interesting feature.

Related Posts

Management Studio’s Staying Power

Kendra Little explains why SQL Server Management Studio isn’t going away anytime soon: After all, SSMS is no longer the cool new kid on the block: Microsoft has shown consistent effort to develop their new tool, Azure Data Studio (the artist formerly known as SQL Operations Studio), since November 2017. Azure Data Studio is built on the […]

Read More

Logical Equivalence and Query Tuning

Erik Darling didn’t warn us that there would be math: Often when query tuning, I’ll try a change that I think makes sense, only to have it backfire. It’s not that the query got slower, it’s that the results that came back were wrong different. Now, this can totally happen because of a bug in previously used […]

Read More

Categories

February 2017
MTWTFSS
« Jan Mar »
 12345
6789101112
13141516171819
20212223242526
2728