Mohsin Khan

Mohsin is a database expert with over 12 years of professional experience as a database administrator and architect. He has a master’s degree in Information Quality. He has accomplished many demanding targets and led and executed many multi-million-dollar projects for some big Fortune 50 companies. He has actively pursued mentoring and coaching others through various writing activities, speaking engagements, blog posts, and discussion platforms dedicated to data professionals. He likes messing around with databases and enjoys sharing his knowledge and experiences.
  • Interests: Database administration, Data Engineering, Database architecture
  • Skills: SQL Server, Azure SQL, Spark, Databricks, Snowflake

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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Question of the Day

A Quick Restore

While doing some testing of an application, I wanted to reset my environment after doing some testing with this code:

USE DNRTest

BACKUP DATABASE DNRTest TO DISK = 'dnrtest.bak'
GO
/*
Bunch of stuff tested here
*/RESTORE DATABASE DNRTest FROM DISK = 'dnrtest.bak' WITH REPLACE
What happens if this runs, assuming the "bunch of stuff" isn't anything affecting the instance.

See possible answers