Should Optimistic Be The Default Isolation Level?
Two Words Alright, I’ve lied to you already. There are way more than two words involved, here. I recently had…
2019-05-15
Two Words Alright, I’ve lied to you already. There are way more than two words involved, here. I recently had…
2019-05-15
Last week in our IEPTO2 class I was asked about queries with RECOMPILE and Query Store. Specifically: Do queries that have the OPTION (RECOMIPLE) hint go into Query...
2019-05-14
The first unexpected behavior is one that may already be familiar to many. [Max server memory] is not as often a maximum for SQL Server [total] memory as it...
2019-05-14
This feature works with SQL Server 2019 and onwards. If you are using an earlier version of SQL Server this feature will not work and will give you an...
2019-05-11
How do you know whether a database code change is going to be great, okay or awful? If you want to test a new version of SQL Server how...
The...
2019-05-08
Kitchen Stink A lot has been written about “kitchen sink” queries. A couple of my favorites are by Aaron Bertrand…
2019-05-07
Paul Randal provides a detailed introduction to troubleshooting SQL Server workload performance using wait statistics.
The post Introduction to Wait Statistics appeared first on SQLPerformance.com.
2019-05-07
This weekend I was in Stockholm in Sweden, talking Query Store and plan forcing with Steinar Anderson, when he mentioned the problems he had while forcing plans that had...
The...
2019-05-06
Today I begin a week-long series where I will be discussing various SQL Server Monitoring Tools. My primary job is to help people with my consulting workshop Comprehensive Database...
2019-04-26
A Long Way From Home Most scripts (even ones I’ve worked on!) that look at the plan cache, have had…
2019-04-26
I’ve been putting together a new PostgreSQL session called “Performance Monitoring for the Absolute...
By Rayis Imayev
(2025-Feb-12) I will jump straight to the problem statement without a "boring" introduction, which, in...
By Steve Jones
I wrote about getting the Redgate Test Data Manager set up in 10 minutes...
Can this baselining and benchmarking sqlserver be done using extended events ? what are...
If this post doesn't meet protocol here, please tell me how to improve as...
I'm a retired IT guy in his 80s fighting boredom by trying to learn...
I have this table and data:
CREATE TABLE [dbo].[SalesTracking] ( [SalesDate] [datetime] NULL, [SalesPersonID] [int] NULL, [CustomerID] [int] NOT NULL, [PONumber] [varchar] (80) COLLATE SQL_Latin1_General_CP1_CI_AS NULL, [paid] [bit] NULL, [total] int ) ON [PRIMARY] GO CREATE CLUSTERED INDEX [SalesTrackingCDX] ON [dbo].[SalesTracking] ([SalesDate]) ON [PRIMARY] GO INSERT dbo.SalesTracking (SalesDate, SalesPersonID, CustomerID, PONumber, paid, total) VALUES ('2024-03-15 10:45:55.067', 1, 1,'PO965' ,1, 100), ('2023-09-24 10:45:55.067', 1, 2,'PO627' ,1, 200), ('2022-07-02 10:45:55.067', 1, 3,'PO6' ,1, 300), ('2022-11-03 10:45:55.067', 1, 4,'PO283' ,1, 400), ('2022-11-26 10:45:55.067', 1, 5,'PO735' ,1, 500), ('2023-04-28 10:45:55.067', 1, 6,'PO407' ,1, 600), ('2022-09-09 10:45:55.067', 1, 7,'PO484' ,1, 700), ('2024-03-13 10:45:55.067', 1, 8,'PO344' ,1, 700), ('2024-04-24 10:45:55.067', 1, 9,'PO254' ,1, 800), ('2022-06-19 10:45:55.067', 1, 10,'PO344',1, 800) GOWhen I run this query, how many unique values are returned for the SalesRank column?
SELECT st.SalesDate , st.SalesPersonID , st.total , RANK () OVER (PARTITION BY st.SalesPersonID ORDER BY st.total desc) AS SaleRank FROM dbo.SalesTracking AS st;See possible answers