How to Think Like the SQL Server Engine: Adding an ORDER BY ...
The sort's input is the 148,328 rows of Id & LastAccessDate
that came out of the Clustered Index Scan, and they're not sorted in any kind of ...
Why Ordering Isn't Guaranteed Without an ORDER BY - Brent Ozar ...
Apr 11, 2020 ... When we do this SELECT, the data comes back in the order of the clustered index: But if someone creates an index on DisplayName and ...
Why Order Isn't Guaranteed Without an ORDER BY - Brent Ozar ...
May 15, 2019 ... By default, with a clustered index on the Id field (identity, starts at 1 and goes up to a bajillion), your results will probably look like this, ordered ...
Expensive Sorts - Brent Ozar Unlimited®
These are fairly easy to diagnose and correct. Look for the Sort operator in your plan, and hover over it to see which column(s) you're ordering by.
How to Think Like the Engine: Index Column Order Matters a LOT ...
Nov 19, 2019 ... WHERE DisplayName = N'Brent Ozar';. DisplayName is in the nonclustered index, but we can't use it for seeks. If you ...
7 Things Developers Should Know About SQL Server - Brent Ozar ...
Sep 25, 2017 ... 0ms. You'll never convince me that this “don't order by or sort on db” is a good rule of thumb. The opposite is true. The rule of thumb should say: “ ...
sp_BlitzCache®: Free SQL Server Plan Cache Analysis Script ...
How to Track Performance of Queries That Use RECOMPILE Hints. March 12, 2020. Brent Ozar · Parameter Sniffing, Query Store (QDS), sp_BlitzCache · 2 ...
Can SELECT * Make a Query Go...Faster?!? - Brent Ozar Unlimited®
Jan 7, 2020 ... In order to calculate the memory grant needed by the sort, SQL Server looks at the amount of data that it thinks is coming out of the Users table.
Cool Query Hints - Brent Ozar Unlimited®
Jan 22, 2020 ... OPTION (FORCE ORDER) – if you're struggling with an execution plan that doesn't quite understand which table is the most selective or should ...
When Do I Need to Use DESC in Indexes? - Brent Ozar Unlimited®
Nov 30, 2020 ... ORDER BY Reputation DESC;. It doesn't matter whether the index is sorted ascending or descending. SQL Server goes to the end of the index ...