sql - When to use Common Table Expression (CTE) - Stack Overflow
Jan 5, 2017 · 31 One of the scenarios I found useful to use CTE is when you want to get DISTINCT rows of data based on one or more columns but return all columns in the table.
sql server - Keeping it simple and how to do multiple CTE in a query ...
Example C, "Using multiple CTE definitions in a single query," calls this out explicitly. Sadly, this example is not provided in the documentation for SQL 2008 and older (i.e., the example wasn't …
sql - What are the advantages/disadvantages of using a CTE? - Stack ...
Sep 10, 2008 · A CTE is not much more than syntactic sugar. It enhances the readability and allows to avoid repetition. Just think of it as a placeholder for the actual statement specified in the WITH() …
SQL - Use a reference of a CTE to another CTE - Stack Overflow
The CTE can be used in a from clause at any level of nesting within other subqueries. The CTEs -- as with everything in SQL -- need to be defined before they are used.
sql server - How to nest CTE properly - Stack Overflow
Dec 20, 2016 · On a side note: See if you can break the habit of starting your CTE definitions with ;WITH and instead get into the habit of ending all your SQL statements with a semi-colon.
sql - Referencing a CTE in a where clause - Stack Overflow
Mar 7, 2025 · I'm trying to use a CTE at the top of my query to be referenced in WHERE clause in a separate CTE further down. For Example: with ref as ( null email, ' ("720884","70540"...
SQL Server CTE and recursion example - Stack Overflow
Nov 9, 2015 · I never use CTE with recursion. I was just reading an article on it. This article shows employee info with the help of Sql server CTE and recursion. It is basically showing employees and …
sql - Insert into from CTE - Stack Overflow
Jun 3, 2014 · INSERT INTO T_SOME_VARIABLE WITH cte AS ( SELECT 1 AS tmp_id FROM dual ) SELECT tmp_id FROM cte; -- this throws error, I just wanted to say. It's good, I've used your solution …
sql - How to remove duplicate rows using CTE? - Stack Overflow
May 30, 2021 · How to remove duplicate rows using CTE? Asked 4 years, 7 months ago Modified 1 year, 9 months ago Viewed 16k times
sql - Difference between CTE and SubQuery? - Stack Overflow
IMO, anyone who thinks a CTE is less readable that a gigantic blob of interwoven subqueries hasn't seen the garbage pile of confusing saw-teeth-shaped queries in use across the majority of enterprise …