Blog Post

Replace NOT IN with JOIN

Example of how to replace NOT IN clause with JOIN

/*NOT IN query*/
USEAdventureWorks;GOSELECTProductIDFROMProduction.ProductWHEREProductIDNOTIN(SELECTProductIDFROMProduction.WorkOrder);

/*JOIN Query*/:-
SELECTp.ProductIDFROMProduction.ProductpLEFTJOINProduction.WorkOrderwONp.ProductID=w.ProductIDWHEREw.ProductIDISNULL;

2012-08-02

4,762 reads

Blogs

T-SQLTuesday 204: Are blogs still relevant?

By

This month’s blogging party is hosted by Jeff Ianucci – his challenge is to...

Are Blogs Still Relevant? I Think They Still Are.

By

As for me, I'll keep writing whenever time permits. I don't expect every post...

Reading Blogs: T-SQL Tuesday #204

By

This is an interesting invitation this month. Jeff Ianucci is a new host, and...

Read the latest Blogs

Forums

Pay for Performance

By Steve Jones - SSC Editor

Comments posted to this topic are about the item Pay for Performance, which is...

Switching Schemas I

By Steve Jones - SSC Editor

Comments posted to this topic are about the item Switching Schemas I

Enforcing Unique Customer Emails When Duplicates Already Exist

By Imran2629

Comments posted to this topic are about the item Enforcing Unique Customer Emails When...

Visit the forum

Question of the Day

Switching Schemas I

I run this query: 

SELECT 
 s.name AS schemaname
 , o.name AS objectname
 FROM sys.objects o
 INNER JOIN sys.schemas s ON s.schema_id = o.schema_id
 WHERE o.name = 'Beer'
I get one row back for an object named dbo.beer. There is an ETL schema and both of these are nonpartitioned tables. I run this code: 
ALTER TABLE dbo.beer switch TO etl.beer
What happens?

See possible answers