Occasionally I come across UPDATE and DELETE statements where the target SQL Server table is referenced with the NOLOCK hint. Does this hint help or hurt performance in this case?
2014-03-03
4,698 reads
There are a number of real-life reporting tasks in SQL that require a 'gaps and islands' analysis. There are a number of techniques around that work, but finding ones that scale well makes for a tougher, but interesting, challenge.
2014-02-28
3,824 reads
In this tip, Sadequl Hussain will try to list a few areas DBAs need to cover when they are designing new systems or reviewing proposed solutions.
2014-02-27
5,421 reads
Views are a valuable tool for the SQL Server Developer, because they hide complexity and allow for a readable style of SQL expression. They aren't there for reasons of performance, and so indexed views are designed to remedy this shortcoming. They're great in certain circumstances but they represent a trade-off, and they come with considerable 'small print'. Jes Borland explains.
2014-02-26
4,674 reads
A common method to detect if a row has changed is to compare hashes. Integration Services itself doesn’t have a hash implementation, so in this tip I’ll show how you can implement a hash detection mechanism using a script component, as an alternative to the pure T-SQL solution.
2014-02-25
3,416 reads
All DBAs need to engage in a little project management to help make sure everything runs smoothly. In this extract from the book Tribal SQL, David Tate explains his system for managing workload, colleagues, and projects, and how not to be just "the guy who says no".
2014-02-24
3,072 reads
A Hyper-V replica will provide a rapid disaster-recovery by simply replicating to a standby site a VM running at the primary site. Is it, therefore, ideal for running SQL Server in high-availability? Well, it depends on the type of HA you require, and whether you need the features that aren't supported.
2014-02-21
3,378 reads
SQL Server security related tasks can be divided into four main categories: physical security, operating system level security, SQL Server configuration and user management. Here is your SQL Server security checklist.
2014-02-20
4,963 reads
The SEQUENCE statement introduced in SQL Server 2012 brings the ANSI SQL 2003 standard method of generating IDs. This is a great relief to database professionals as it solves some problems what are awkward to solve with the IDENTITY property. Joe Celko explains the basics of using a SEQUENCE.
2014-02-19
5,839 reads
Recently we presented a procedure for uploading data to a Windows Azure SQL Database from an on-premise SQL Server instance. Today we will accomplish the same objective by employing a more traditional approach to data extraction, transformation, and loading (ETL) that relies on SQL Server Integration Services (SSIS).
2014-02-18
3,765 reads
By Steve Jones
We had an interesting discussion about deployments in databases and how you go forward...
By ChrisJenkins
You could be tolerating limited reporting because there isn’t an off the shelf solution...
A while back I wrote a quick post on setting up key mappings in...
Comments posted to this topic are about the item Remotely Engineer Fabric Lakehouse objects:...
Comments posted to this topic are about the item Creating JSON III
Comments posted to this topic are about the item Testing is Becoming More Important
In a SQL Server 2025 table, called Beer, I have this data:
BeerIDBeerName 1Becks 2Fat Tire 3Mac n Jacks 4Alaskan Amber 8KirinI run this code:
SELECT JSON_OBJECTAGG(
BeerID: BeerName )
FROM beer;
What are the results? See possible answers