DAX contains a host of time-intelligence functions with exotic names such as SAMEPERIODLASTYEAR and PARALLELPERIOD. In the last article in this series, Andy Brown explains how to write measures using the range of date functions in DAX, and also explains how time-intelligence functions work behind the scenes.
2020-03-06
This article explains indexed views and provides an example that shows when they should be used to improve performance of a complex query.
2020-02-25
22,201 reads
Problem This is one of the errors that I frequently encounter while deploying or processing SSAS OLAP cubes on the client's computers or on a remote server. Recently, one of my team members also faced the same issue and so I thought to write a resolution for the issue. The error is something like this: […]
2020-02-03
9,879 reads
Learn how you can modify an SSIS package to dynamically process SSAS cubes.
2020-01-13
11,030 reads
Introduction Developing predefined reports in addition to all the ad-hoc queries have been a part of my daily activities. Often I find my stakeholders asking me to prepare reports in which they want to know something that has never happened. It might sound strange, but yeah, that's what their point of concern is all about. […]
2021-11-26 (first published: 2019-11-04)
15,842 reads
The Problem Recently, while working with one of my clients, I came across a script in which I had to introduce a scalar User-Defined Function in the SELECT statement. The SELECT used to return around 750K records. However, after introducing the UDF, the row count significantly increased to 826K. There were no other changes made […]
2019-10-14
5,155 reads
As SQL developers, we tend to think of performance tuning in terms of crafting the best table indices, avoiding scalar and table valued functions, and analyzing query plans (among other things). But sometimes going back to the spec and applying some properties of elementary math can be the best way to begin to improve performance of SQL queries which implement mathematical formulas. This article is a case study of how I used this technique to optimize my SQL implementation of the Inverse Simpson Index.
2021-05-07 (first published: 2019-09-12)
5,444 reads
Learn some of the basics of using Dynamic SQL in a short series of videos.
2019-08-12
8,666 reads
Previous Monday to the Start of the Previous Quarter
2019-07-29 (first published: 2019-07-18)
548 reads
The the basics of SQL and T-SQL in this short course of videos that explain some of the concepts.
2019-07-16
27,639 reads
By James Serra
Microsoft Fabric makes it wonderfully easy to put many analytics workloads on one platform....
By Steve Jones
I recently started playing with the MCP Server for SQL Server, which is a...
If you spend your days tuning queries, managing pipelines, or keeping a production database...
Has anyone written a wrapper function (or similar) around STRING_AGG() to allow the retrieval...
Putting this here as we're currently on SQL Server 2019 installed on Windows Server...
Comments posted to this topic are about the item Never is Not the Policy
I have added a few indexes to one of my tables in SQL Server 2025:
ALTER TABLE dbo.CustomerContact
ADD CONSTRAINT PK_CustomerContact
PRIMARY KEY (CustomerID);
-- Create index on CustomerEmail
CREATE INDEX IX_CustomerContact_CustomerEmail
ON dbo.CustomerContact (CustomerEmail);
CREATE INDEX IX_CustomerContact_CustomerPhone
ON dbo.CustomerContact (phone);
I then do this to disable one index:
alter index IX_CustomerContact_CustomerPhone on dbo.CustomerContact disableI see this when I check the index status:
I decide to rebuild all indexes with this command:
ALTER INDEX ALL ON dbo.CustomerContact rebuildAfter I do this, what will I see for the index status? See possible answers