2012-09-03
2,490 reads
SQL Server Central
2012-07-27
3,020 reads
2012-07-04
1,443 reads
SSC Clinic: Can Implementing "Optimize for Ad Hoc Queries" Boost Performance for the SQLServerCentral.com and Simple-Talk.Com SQL Servers?
With the introduction of the instance-level option “optimize for ad hoc workloads” in SQL Server 2008, DBAs have a tool to deal with a problem known as plan cache pollution, or plan cache bloat. It’s often caused when one-time use ad hoc queries are sent to SQL Server from Object-Relational Mapping (ORM) solutions, such as LINQ, NHibernate, or Entity Framework. The problem can prevent SQL Server from using its available memory optimally, potentially hurting performance.
2012-06-14
2,489 reads
2012-05-18
77 reads
New PowerPivot Forum
We have a new forum setup for your Powerpivot questions. If you are working with Powerpivot, please feel free to ask questions here.
2011-11-16
1,895 reads
Are You On the List?
The SQLServerCentral 2011 Party at the Summit is getting bigger and bigger. See if you are on the list, and if not, learn how to get your ticket.
2011-10-11 (first published: 2011-10-05)
1,002 reads
Database Size Survey
Help us collect some data on the sizes and counts of databases in your environment. Take a few minutes and answer this survey.
2011-07-18 (first published: 2011-07-01)
3,223 reads
2011-06-25
3,348 reads
2011-06-22
56 reads
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Question of the Day
The string_agg function
We create the following table and then insert some records in it:
create table t1 ( id int primary key, category char(1) not null, product varchar(50) ); insert into t1 values (1, 'A', 'Product 1'), (2, 'A', 'Product 2'), (3, 'A', 'Product 3'), (4, 'B', 'Product 4'), (5, 'B', 'Product 5');What happens if we execute the following query in both Sql Server and PostgreSQL?
select id,
category,
string_agg(product, ';')
over (partition by category order by id
rows between unbounded preceding and unbounded following) as stragg
from t1; See possible answers