If you have accidently deleted data from database tables in MS SQL Server, you can restore the deleted data (tables) using Log Sequence Number (LSN). But for this, you need the transaction backup file ...

SQL Window functions are an advanced type of function in SQL. In this post, you will learn about what SQL window functions are and how they can be used or work.

You don't need an expertise in SQL to limit the number of records in a group. With your user knowledge of queries and reports, you have all the expertise you need.