SQL's windowing functions are surprisingly versatile, and allow us to cut out all those self-joins and explicit cursors. Joe Celko explains how they are used, and shows a few tricks such as calculating deltas in a time series, and filling in gaps.
2013-11-14
7,422 reads
In-Memory table or what Microsoft refers to as In-Memory OLTP, or Hekaton is a new type of table is available with SQL Server 2014. In this article Greg Larsen discusses the different types of indexes you can place on your In-Memory tables, and how those indexes support different search criteria.
2013-11-13
2,920 reads
This tip will guide you through a simple example to illustrate how you can use the SQL Server Distributed Replay feature to replay a simple SQL Server trace file that contained two sessions executing statements concurrently.
2013-11-12
1,971 reads
Maybe the best way of helping the busy database professional to get started with practical PowerShell-based administration is to pull together all the essential community cmdlets into a toolkit for the POSH DBA, and explain how and why you'd use them.
2013-11-11
3,446 reads
Sqlcmd makes many SQL Server tasks, such as automating test runs and maintenance tasks, easier and quicker. The sqlcmd command-line utility is valuable to any database developer or DBA as the prime means of executing batches of SQL Statements to SQL servers, and saving results to file. Rob Sheldon gives you the basic facts about this great utility.
2013-11-08
6,993 reads
There is a lot of Microsoft buzz about Power BI and Excel these days, but customers need real-world, professional business intelligence solutions that meet their complex real-world requirements today. In this article, Jen Underwood shares what technologies were used to develop a dashboard solution for a Fortune Global 500 company using Microsoft Business Intelligence technologies, and why. Some of the decisions may surprise you and the lessons learned are sure to be of value.
2013-11-07
5,745 reads
Column Store Index, which improves performance of data warehouse queries several folds, was first introduced in SQL Server 2012. Though it had several limitations, now SQL Server 2014 enhances the columnstore index and overcomes several of the earlier limitations. In this article, Arshad Ali discusses how you can get started using the enhanced columnstore index feature in SQL Server 2014 and do some performance tests.
2013-11-06
4,375 reads
This article describes the SQL Server database restore principles for full backups, differential backups and transaction log backups and how to perform the restores to get to a particular point in time. This tip describes SQL Server database restore principles on a database that is using the FULL recovery model.
2013-11-05
5,308 reads
Creating and maintaining mutually beneficial relationships with external vendors is one of the pillars of good project management. Dwain Camps goes through what to expect and allow in your client-vendor relationship during the various stages of a given project to ensure its success and secure that all important win-win outcome.
2013-11-04
2,844 reads
Before the SQL Window functions were implemented, it was tricky to calculate rolling totals or moving averages efficiently in SQL Server. There are now a number of techniques, but which has the best performance? Dwain Camps gets out the metaphorical stopwatch.
2013-11-01
4,628 reads
By James Serra
I’m honored to be hosting T-SQL Tuesday — edition #192. For those who may...
By Vinay Thakur
Continuing from Day 2 , we learned introduction on Generative AI and Agentic AI,...
Quite the title, so let me set the stage first. You have an Azure...
Comments posted to this topic are about the item A Quick Restore
Comments posted to this topic are about the item Guarding Against SQL Injection at...
I have a quick question on Ola Hallengren Index Optimize Maintenance . Do we...
While doing some testing of an application, I wanted to reset my environment after doing some testing with this code:
USE DNRTest BACKUP DATABASE DNRTest TO DISK = 'dnrtest.bak' GO /* Bunch of stuff tested here */RESTORE DATABASE DNRTest FROM DISK = 'dnrtest.bak' WITH REPLACEWhat happens if this runs, assuming the "bunch of stuff" isn't anything affecting the instance. See possible answers