2025-01-31
403 reads
2025-01-31
403 reads
2025-01-15
1,833 reads
This tip's objective is to present and describe several T-SQL examples for creating, using, and analyzing GUIDs and assessing their uniqueness.
2024-12-30
2024-03-13
439 reads
2023-11-08
444 reads
There is sometimes a need to figure out the maximum space that is being used by a particular column in your database. You would initially think that the LEN() function would allow you to do this, but this function does not work on Text, NText or Image data types, so how do you figure out the length of a value in a column that has one of these data types?
2022-04-20
2021-09-29
676 reads
2021-01-12
438 reads
2021-01-05
526 reads
2019-12-19
255 reads
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...
I wrote a stream-of-consciousness post a few months ago about what I do in...
I'm a retired IT guy in his 80s fighting boredom by trying to learn...
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WHERE a.ROWID IN (SELECT rid FROM ( SELECT ROWID rid, row_number() OVER (PARTITION BY...
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