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

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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?

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