How Do I Update the Top N Records in SQL Server?

Updating Top Records in SQL Server

In SQL Server, updating a specified number of top records requires a precise syntax. Let's consider the given scenario where we want to modify the F1 field in the top 100 records of table T1 with fields F1 and F2.

To accomplish this update, we can use the following syntax:

update top (100) table1 set f1 = 1

This statement will update the F1 field to the value 1 for the 100 records with the highest values in the table. The parentheses around the "update top (100)" statement are mandatory.

It's worth noting that, by default, SQL Server performs updates in a non-transactional manner. If an error occurs during the update, the changes already made will be committed. To avoid potential data loss, it's recommended to use explicit transactions when performing critical update operations.

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