Standard SQL defines four isolation levels that can be set using the SET TRANSACTION ISOLATION LEVEL statement: Serializable, Repeatable Read, Read Committed, and Read Uncommitted. Although all of the ...

What the NOLOCK hint does is enforce SQL Server's Read Uncommitted isolation level, which allows for what ... example of poor transaction handling in code, in a real-world scenario this could ...

The SQL specification defines ... been rolled back. The read committed transaction isolation level makes dirty reads impossible, but phantom and nonrepeatable reads are still a possibility. What does ...