It is always more efficient to maintain referential integrity by using constraints rather than triggers. Sometimes it isn't obvious how to do this. Until a recent idea by Alex Kuznetsov, the history table presented problems for checking data that were difficult to solve with constraints. Joe Celko explains.
2011-01-11
3,294 reads
This article demonstrates the relative merits of natural and surrogate keys and benchmarks their performance in different scenarios.
2011-01-10
4,502 reads
It’s important to profile your database queries to see what happens in response to Entity Framework queries and other data access activities, says Julie Lerman, who gives you the details on several profiling options to improve you coding.
2011-01-07
3,027 reads
components. These same configuration settings can be leveraged in Script Task, but you also have the option of triggering and tracking events in a considerably more customizable manner. This article explores features that provide this flexibility.
2011-01-06
3,819 reads
I need to monitor all the SQL Agents to find out if a job failed in the last 24 hours. Could this be done with policy based management? If so, can you show me how to create the policy?
2011-01-05
4,291 reads
This article examines practical methods of managing and monitoring large tables which make use of the IDENTITY property.
2011-01-04
3,913 reads
Many times developers want to put logic into their code or SSIS/DTS package to check the SQL Server authentication mode. How can this be done programmatically?
2011-01-03
5,211 reads
As a database developer or tester sometimes you need to have production like data in your environment for your development or testing, but you cannot have the production data because of security and privacy issues. So how you can generate test data or replicate similar data as in production for your development or test environment?
2010-12-31
5,955 reads
When using the BETWEEN operator on multiple columns, you are likely using a 2D range query. Such queries perform very poorly in SQL Server. This article examines rewriting these queries for improved performance.
2010-12-30
3,442 reads
I'm looking at several new visualization features in SQL Server 2008 R2 Reporting Services and the data bar looks like something that I could really use. Can you provide an example of how to use this in a report?
2010-12-29
4,396 reads
PlanTrace: Stop Reading Redshift EXPLAIN Plans. Start Seeing Them Introducing PlanTrace — a free, browser-based...
By Steve Jones
I went to sleep while reading a Kindle book on my phone. I know...
A conversation with Jan Laš, CIO at HOPI, about what deploying a data agent...
BCA KCU ASEMKA Hub.0851•8812•0691 Jl. Asemka No.27-30, Pinangsia, Kec. Taman Sari, Kota Jakarta Barat,...
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I have this data in a table called dbo.NFLTeams
TeamID TeamName City YearEstablished ------ -------- ---- --------------- 1 Cowboys Dallas 1960 2 Eagles Philadelphia 1933 3 Packers Green Bay 1919 4 Chiefs Kansas City 1960 5 49ers San Francisco 1946 6 Broncos Denver 1960 7 Seahawks Seattle 1976 8 Patriots New England 1960If I run this code, how many rows are returned?
SELECT TOP 2
json_objectagg('Team' : TeamName)
FROM dbo.NFLTeams;
See possible answers