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Articles with tag CTE Rss

Search for any content tagged cte

   Items 1 to 20 of 24    Older >>
 

Windowing Functions: Tell me when that changes.

Windowing functions aren't just for analyzing numbers/dates. Using windows functions to analyze when a character field changes is a little know resource  Read more...
By Michael Morin 2016/02/17 | Source: SQLServerCentral.com | Category: windows functions
Rating: |  Discuss |   Briefcase | 5,003 reads

Cursor-Killing: Accessing Data in the Next Row

Cursors are considered by many to be the bane of good T-SQL. What are the best ways to avoid iterative T-SQL and to write queries that look and perform beautifully? This first part in an ongoing series of cursor-killing handles inter-row analysis.  Read more...
By Edward Pollack 2015/12/18 (first published: 2014/05/27) | Source: SQLServerCentral.com | Category: cte
Rating: |  Discuss |   Briefcase | 21,785 reads

Implementing John Conway's Game of Life in Microsoft SQL Server

A fun exercise, using CTEs to implement John Conway's Game of Life cellular automata simulation  Read more...
By Paul Chang 2015/09/22 | Source: SQLServerCentral.com | Category: cte
Rating: |  Discuss |   Briefcase | 4,861 reads

Exploring Recursive CTEs by Example

Recursive CTEs can be confusing and scary, so examining some non-standard examples may cast light upon these shadowy demons.  Read more...
By Dwain Camps 2014/07/25 (first published: 2012/07/17) | Source: SQLServerCentral.com | Category: t-sql
Rating: |  Discuss |   Briefcase | 22,352 reads

Cursor-Killing: Accessing Data in the Next Row

Cursors are considered by many to be the bane of good T-SQL. What are the best ways to avoid iterative T-SQL and to write queries that look and perform beautifully? This first part in an ongoing series of cursor-killing handles inter-row analysis.  Read more...
By Edward Pollack 2015/12/18 (first published: 2014/05/27) | Source: SQLServerCentral.com | Category: cte
Rating: |  Discuss |   Briefcase | 21,785 reads

Duplicate Detection and Management

Inevitably, every DBA is eventually asked to delete, merge, or otherwise report on duplicate data. There are many tools at our disposal to make this task both simple and efficient to complete. Read on for simple steps and examples to effectively deal with duplicate data.  Read more...
By Edward Pollack 2014/04/29 | Source: SQLServerCentral.com | Category: duplicate
Rating: |  Discuss |   Briefcase | 6,446 reads

Nesting Levels in SQL

The 'Structured' part of SQL denotes the fact that queries can be nested inside each other in such a way that, wherever you can use a table, you can use a table expression. Such derived tables can provide powerful magic, to which is added CTEs and Lateral Tables.   Read more...
By Additional Articles 2014/02/11 | Source: SimpleTalk | Category: structure
Rating:  Rate this |   Briefcase | 4,391 reads

How to Compare Rows within Partitioned Sets to Find Overlapping Dates

How to Compare Rows within Partitioned Sets to Find Overlapping, Contiguous, or Gap dates  Read more...
By Kevin Wu 2013/12/25 (first published: 2010/10/11) | Source: SQLServerCentral.com | Category: cte
Rating: |  Discuss |   Briefcase | 7,053 reads

Common table expressions and circular references

Finding circular references that are stopping your CTE from working.  Read more...
By Geoff Norman 2013/09/02 (first published: 2011/01/31) | Source: SQLServerCentral.com | Category: cte
Rating: |  Discuss |   Briefcase | 16,287 reads

Displaying Sorted Hierarchies (SQL Spackle)

Learn how you can query a hierarchy of data and also return the results in an ordered fashion. A handy T-SQL skill that you will use over and over again.  Read more...
By Jeff Moden 2013/08/23 (first published: 2011/03/10) | Source: SQLServerCentral.com | Category: t-sql
Rating: |  Discuss |   Briefcase | 16,863 reads

Exploring Recursive CTEs by Example

Recursive CTEs can be confusing and scary, so examining some non-standard examples may cast light upon these shadowy demons.  Read more...
By Dwain Camps 2014/07/25 (first published: 2012/07/17) | Source: SQLServerCentral.com | Category: t-sql
Rating: |  Discuss |   Briefcase | 22,352 reads

Pros and cons of six SQL table tools

This article shows how to use 6 SQL table-based tools to solve the same problem, and gives the pros and cons of each.  Read more...
By Andy Owl 2011/12/26 | Source: SQLServerCentral.com | Category: t-sql
Rating: |  Discuss |   Briefcase | 8,680 reads

Dealing with Incomplete Data - A T-SQL Puzzle 1

Client data received for processing may have invalid records based on processing requirements. Identifying and dealing with bad records in a specific scenario is the object of this article.  Read more...
By Suresh Maganti 2011/11/22 | Source: SQLServerCentral.com | Category: t-sql
Rating: |  Discuss |   Briefcase | 3,314 reads

Calculating Stock Returns Using the ROW_NUMBER function and CTEs

In finance, when pricing data isn't available on last day of week, month or year, calculating returns is tricky. This article addresses the issue.   Read more...
Rating: |  Discuss |   Briefcase | 5,479 reads

Hidden RBAR: Counting with Recursive CTE's

"Counting" is essential to many high performance code techniques. SQL Server MVP, Jeff Moden, shows us how to make sure that we're "Counting" and not "Crippling" our trick-code.  Read more...
By Jeff Moden 2011/08/08 | Source: SQLServerCentral.com | Category: t-sql
Rating: |  Discuss |   Briefcase | 13,283 reads

Displaying Sorted Hierarchies (SQL Spackle)

Learn how you can query a hierarchy of data and also return the results in an ordered fashion. A handy T-SQL skill that you will use over and over again.  Read more...
By Jeff Moden 2013/08/23 (first published: 2011/03/10) | Source: SQLServerCentral.com | Category: t-sql
Rating: |  Discuss |   Briefcase | 16,863 reads

Concatenating Rows

Often in database design we store different values in rows to take advantage of a normalized design. However many times we need to combine multiple rows of data into one row for a report of some sort. New author Carl P. Anderson brings us some interesting T-SQL code to accomplish this.  Read more...
By Carl P. Anderson 2011/03/04 (first published: 2009/10/14) | Source: SQLServerCentral.com | Category: t-sql
Rating: |  Discuss |   Briefcase | 147,586 reads

Common table expressions and circular references

Finding circular references that are stopping your CTE from working.  Read more...
By Geoff Norman 2013/09/02 (first published: 2011/01/31) | Source: SQLServerCentral.com | Category: cte
Rating: |  Discuss |   Briefcase | 16,287 reads

How to Compare Rows within Partitioned Sets to Find Overlapping Dates

How to Compare Rows within Partitioned Sets to Find Overlapping, Contiguous, or Gap dates  Read more...
By Kevin Wu 2013/12/25 (first published: 2010/10/11) | Source: SQLServerCentral.com | Category: cte
Rating: |  Discuss |   Briefcase | 7,053 reads

An Urgent Ad Hoc Report

In this new article, Yakov Shlafman shows us how he wrote a quick ad hoc report of expenses so that he could leave on time one day.  Read more...
By Yakov Shlafman 2010/03/17 | Source: SQLServerCentral.com | Category: t-sql
Rating: |  Discuss |   Briefcase | 8,058 reads
   Items 1 to 20 of 24    Older >>