SQL Window Functions Series: RANK() and DENSE_RANK()
Welcome to the fascinating world of SQL window functions! Today, we'll explore in detail: RANK() and DENSE_RANK().
2023-11-20 (first published: 2023-11-15)
1,515 reads
Advanced Querying
Prime Number Table Generator (new ver crunches to 1 Mil in <10.5 sec!)
Generates prime numbers and puts them into a table for future reference by adhoc queries and database and application code. 100% set-based. DDL embedded.
2009-07-20 (first published: 2009-07-03)
1,302 reads
Why Read-only Table Parameters is Not Enough
In this article I discuss a new feature in SQL 2008, table-valued parameters and particularly the restriction that they have to be read-only. I argue that this makes this feature considerably less useful that it could be, and that in order to build scalable applications be able to pass read-write table parameters between stored procedures is essential.
2008-04-02
2,677 reads
Solving the "Running Total" & "Ordinal Rank" Problems in SS 2k/2k5
Learn how to solve a couple of common T-SQL issues with MVP Jeff Moden.
2008-01-31
17,451 reads
The Puzzle of 'Rating Decomposition'
When reading rating information, how do you you knew how many points each separate voter gave if you only know the average rating and the number of votes? Well, you might be surprised to learn that you can figure it out using SQL
2007-10-01
1,919 reads
Avoid enclosing Indexed Columns in a Function in the WHERE clause
When a function is wrapped around an indexed column in the WHERE clause it will usually prevent the proper usage of that index. This article gives an example and discusses what other options are available.
2007-09-27
5,005 reads
SQL Server 2008 - The Power of Merge
We have a first look at one of the features in SQL Server 2008 that was cut from SQL Server 2005, but which has been highly anticipated. How many times have you written an "insert new, update match" routine? Jacob Sebastion shows us easy this becomes with the new MERGE keyword in SQL Server 2008.
2007-09-11
13,955 reads
Server Side Paging With SQL Server 2005
One of the more common requests of an application working with SQL Server is to deal with pages, or sections, or data rather than an entire result set. Often an application retreives the entire result set and then only shows the user a few records, repeating the process with the next page. Regular columnist Jacob Sebastian brings us a more efficient method of implementing paging in SQL Server 2005.
2007-08-29
13,519 reads
Getting Random Results
One common need that DBAs run into is building a report that returns data in some random order. Especially if you're doing some type of contest, like giving something away at your User Group meeting. Andy Warren brings us a short article on this with a look at the performance impact of randomly ordering results.
2007-08-23
4,327 reads
How to link different data sources together
Describes how you can link SQL Server with many different data sources like a directory as Active Directory Application Mode, a Microsoft Indexing Server catalog, a Microsoft Access database and a Microsoft Excel spreadsheet. Also explains how to query linked servers using the OPENQUERY command.
2007-08-21
2,712 reads
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