CTE in SQL Server Examples
In this article we cover what a Common Table Expression CTE is and how to write a CTE for doing selects, inserts, deletes, updates and more.
2021-06-02
In this article we cover what a Common Table Expression CTE is and how to write a CTE for doing selects, inserts, deletes, updates and more.
2021-06-02
As SQL developers, we tend to think of performance tuning in terms of crafting the best table indices, avoiding scalar and table valued functions, and analyzing query plans (among other things). But sometimes going back to the spec and applying some properties of elementary math can be the best way to begin to improve performance of SQL queries which implement mathematical formulas. This article is a case study of how I used this technique to optimize my SQL implementation of the Inverse Simpson Index.
2021-05-07 (first published: 2019-09-12)
5,382 reads
This script features as we can through the CTE Top10FilesWithLargerDiskConsumption the top ten data files that are showing greater consumption of hard drive related data-reading activities.
2019-01-15 (first published: 2019-01-08)
1,049 reads
2018-07-12
1,147 reads
A fun exercise, using CTEs to implement John Conway's Game of Life cellular automata simulation
2018-02-19 (first published: 2015-09-22)
6,594 reads
2015-04-28
1,753 reads
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.
2015-12-18 (first published: 2014-05-27)
22,665 reads
2013-09-25
2,984 reads
2013-09-17 (first published: 2013-09-06)
1,446 reads
Finding circular references that are stopping your CTE from working.
2013-09-02 (first published: 2011-01-31)
19,580 reads
By John
Failing to plan is planning to fail. When organizations first begin implementing Azure networking,...
By Steve Jones
As I use containers more and more to run various things, I decided I...
By Kevin3NF
Old Reliable Still Matters If you’ve been around SQL Server for a while, you’ve...
I maintain an application written years ago, where the database is on a Windows...
I’m working on a jewelry e-commerce project and need advice on designing an efficient...
Comments posted to this topic are about the item The Duplicate Cursor
Can I run this code:
DECLARE ANewTable CURSOR FOR SELECT * FROM ANewTableSee possible answers