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SQLServerCentral Article

Understanding CRUD Operations on Tables with B-tree Indexes, Page-splits, and Fragmentation

Introduction Every DML transaction reads the data before it makes any changes. Not only during a SELECT query, but when you run any DML statement, insert, update, or delete, SQL Server first fetches a bunch of pages into the buffer pool locating the desired rows and changes them while synchronously writing to the transaction log […]

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2021-05-10

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SQLServerCentral Article

Optimize Your SQL by Reformulating the Spec

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.

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2021-05-07 (first published: )

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Question of the Day

Mixed Backups

I have a complex database with a few filegroups and files. Can I run a backup command like this? (assume file/filegroup names are valid).

BACKUP DATABASE [complex]
    FILE = N'thirdone'
 ,  FILE = N'thirdtwo'
 ,  FILEGROUP = N'second' 
 TO  DISK = N'C:\Program Files\Microsoft SQL Server\MSSQL16.SQL2022\MSSQL\Backup\complex.bak' 
 WITH NOFORMAT, NOINIT,  NAME = N'complex-Full Database Backup', SKIP, NOREWIND, NOUNLOAD,  STATS = 10
GO

See possible answers