Indexing

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Index Scans and Table Scans

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There are several things that you can do to improve performance by throwing more hardware at the problem, but usually the place you get the most benefit from is when you tune your queries. One common problem that exists is the lack of indexes or incorrect indexes and therefore SQL Server has to process more data to find the records that meet the queries criteria. These issues are known as Index Scans and Table Scans.

2025-06-06

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Question of the Day

Adding Defaults

I have a table, called dbo.logger, in SQL Server 2022. I decide to add two new columns to this table with this code.

ALTER TABLE dbo.logger ADD CreateDate DATETIME CONSTRAINT dfGetDate DEFAULT GETDATE()
GO
ALTER TABLE dbo.logger ADD ModifyDate DATETIME DEFAULT dfGetDate
GO
What happens when I run these two batches?

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