Normally, the query Optimiser won't consider 'bushy' plans, where both operands to a join operator could be intermediate results from other joins. This means that it won't produce good query plans for some types of query. Hints, by themselves won't do it. More powerful magic is required.
2013-04-03
3,486 reads
n a database I currently support, the application makes use of db_datareader and db_datawriter to give permissions to the tables. In a different database, it's even worse as the application uses db_owner. We're adding new tables to both databases and we don't want the application to have access to these tables. How can I deal with the use of these three roles?
2013-04-02
3,632 reads
Pivoting SQL Server tables is always awkward, even with the PIVOT and UNPIVOT operators. If you want to get the job done without GROUP BY or PIVOT, here is a way to do it using only REPLACE.
2013-04-01
6,173 reads
In this tip we will look at one way to achieve control of stored procedures to ensure that reuse is for the intended purpose and changes do not break other applications that may be using this same code.
2013-03-29
4,280 reads
When you need to shred just part of the data within a large XML file into a SQL Server table, the most efficient way is to just select what you need via XQuery or by using XPath, before shredding it into a table. But precisely how would you do that?
2013-03-28
3,174 reads
You have the option of using PowerShell when automating management of SQL Server 2012 Integration Services. While this functionality is not as straightforward as those accustomed to traditional PowerShell cmdlets might expect, the steps required to accomplish the most common SSIS administrative tasks follow a relatively consistent pattern.
2013-03-27
2,366 reads
I have been trying to tune my SQL Server and I noticed a few database settings for statistics. I also read the previous tip on automatic statistics updates. Could you please describe the Auto Create Statistics Async option? How is this configured and when should I use it and when should I avoid using it?
2013-03-26
4,282 reads
It is sensible to check the performance of different solutions to data analysis in 'lab' conditions. Measurement by instrumentation makes it easier to develop systems that are efficient.
2013-03-25
2,676 reads
In SQL Server, the built in conditions and policies are a great place to get started with monitoring your environment, but there are no facets for some aspects of SQL Server I want to monitor. How can I check on my environment using Policy Based Management? Check out this tip to learn more.
2013-03-22
3,325 reads
SQL Server's Query optimiser judges the best query plan from the data in the relevant tables and the server's hardware. How, then, can you investigate the query plans being generated for slow-running queries on a customer's production server when you can neither access the server, nor recreate the database from a backup?
2013-03-21
2,344 reads
By Steve Jones
“Don’t aim to have others like you; aim to have them respect you.” –...
Many years ago, before I joined Oracle, I was working on a major modernisation...
If you work with data pipelines, SQL, notebooks, or machine learning models, a Mac...
Comments posted to this topic are about the item SQL Art, Part 4: Happy...
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In SQL Server 2025, I have a table (dbo.UserPermission) that contains this data:
UserID UserPermissions 15 23 37What is returned when I run this code:
select bit_count(UserPermissions) as PermissionCount from dbo.UserPermission where UserID = 3;See possible answers