Dec 19, 2024 · Learn about the SQL Server NOLOCK hint and how it impacts queries to help you determine if it is useful or detrimental to query results.

May 7, 2025 · NOLOCK in SQL Server is a hint that allows a SELECT statement to read data from a table while avoiding locking mechanisms. This can allow for quicker data retrieval, but it …

Nov 18, 2025 · READUNCOMMITTED and NOLOCK can't be specified for tables modified by insert, update, or delete operations. The SQL Server query optimizer ignores the …

Mar 27, 2009 · " With the NOLOCK hint (or setting the isolation level of the session to READ UNCOMMITTED) you tell SQL Server that you don't expect consistency, so there are no …

Jun 20, 2025 · Master SQL Server concurrency. Our deep-dive guide explains transaction isolation levels, the dangers of NOLOCK, and how to solve blocking with RCSI.

Oct 7, 2025 · Explore the NOLOCK hint in SQL Server to uncover myths, misconceptions, and best practices. Learn how to avoid data inconsistency and enhance query performance.

Jul 23, 2025 · So the solution in SQL Server is that the NOLOCK table hint allows you to instruct the query optimizer to read a given table without obtaining an exclusive or shared lock.

Feb 18, 2025 · The WITH (NOLOCK) table hint allows SQL Server to read data without acquiring shared locks. This means queries can execute without being blocked by write operations, …

What is NOLOCK? The NOLOCK table hint is used in SQL Server to allow reading data without acquiring shared locks, thereby avoiding blocking due to other transactions.

Nov 30, 2012 · The WITH (nolock) hint is an explicit command directed at a specific table or view used to set the transaction isolation level against the table or tables within a view for a query. …