Column Store Index, a new feature in SQL Server 2012, improves performance of data warehouse queries several folds. Arshad Ali shows you how to create column store index, and how to use index query hint to include or exclude a column store index.
2012-10-09
3,471 reads
The challenge is to compare the data of the rows and group the input data. The data needs to be grouped based on the Product ID, Date, TotalLines, LinesOutOfService.
2012-10-08
1,846 reads
Recently while working on a project to import data from an Excel worksheet using SSIS, I realized that sometimes the SSIS Package failed even though when there were no changes in the structure/schema of the Excel worksheet. I investigated it and I noticed that the SSIS Package succeeded for some set of files, but for others it failed. I found that the structure/schema of the worksheet from both these sets of Excel files were the same, the data was the only difference. How come just changing the data can make an SSIS Package fail? What actually causes this failure? What can we do to fix it?
2012-10-08
3,887 reads
Jonathan Lewis (Oracle Ace Director, OakTable Network) and Grant Fritchey (Microsoft SQL Server MVP) will host a live discussion on Oracle and SQL Server, this time in relation to temporary tables.
2012-10-08 (first published: 2012-09-27)
5,894 reads
Changing the structure of a very large table doesn't need to require a maintenance window.
2012-10-05 (first published: 2011-04-26)
22,235 reads
This guide details high-level performance numbers expected and a set of best practices on getting optimal performance when using Data Quality Services (DQS) in SQL Server 2012 with Cumulative Update 1.
2012-10-05
1,697 reads
This article will demonstrate a method of creating an Excel-based CPU/scheduler performance dashboard for SQL Server 2005+.
2012-10-04
9,790 reads
Relational Datbases have tables as data structures, not arrays. This makes it tricky and slow to do matrix operations, but it doesn't mean it is impossible to do. Joe gives the Celko Slant on how to go about doing Matrix Math in SQL.
2012-10-04
3,741 reads
I need to create views? How many? Today? This article talks about a few issues with using views too extensively in your design.
2012-10-02
7,758 reads
I want to backup my SQL Server databases to a folder, but I want to minimize who has access to the folder. In other words, I want to make sure that members of the Windows Local Administrators group don't get to the backups without intentionally trying to bypass the security. How do I do that?
2012-10-02
3,264 reads
By ReviewMyDB
Index maintenance has always meant nightly jobs and a window you have to defend....
I’m sure you’ve all heard the tale of Goldilocks and the Three Bears, but...
By Steve Jones
One of the things I’ve been requesting for a number of years is cost...
Comments posted to this topic are about the item SQL Art, Part 4: Happy...
Comments posted to this topic are about the item SQL Server Still Wins
Comments posted to this topic are about the item DBCC CHECKDB Limits I
I have this data in the dbo.Commission table in a SQL Server 2022 database.
salesperson commission Brian 12 Brian 16 Andy 7 Andy 14 Andy 21 Steve 20 Steve NULLAll the data is a varchar, and I decide to run this query to get the totals for each salesperson.
SELECT SalesPerson
, AVG(TRY_PARSE(Commission AS int)) AS TotalCommission
FROM commission
GROUP BY SalesPerson
GO
What average commission is calculated for Steve? See possible answers