ntext is a data type in SQL Server. Questions should be specifically about the ntext data type, such as it's behaviour or (lack of) functionality, such as when compared to nvarchar(MAX) that superceded it in SQL Server 2005.
ntext
allows for storage of values longer than 4,000 characters/8,000 bytes in a string based data type in SQL Server.
The data type was deprecated in SQL Server 2005 and should not be used in new development work, and ideally work to replace any existing use of it should be completed. Microsoft have stated the data type will be removed in a future version of SQL Server, however, as of SQL Server 2022 the data type has not yet been removed.
ntext
(as well as text
and image
) cannot be used in a lot of functionality that the newer data types can be used in.