||SQL Server Tips by Burleson
Data types for code use
A few data types are exclusively used in TSQL statements because it
would make no sense trying to use them in a table. There are only
A cursor is not a data type to store some data; it is either
declared with the FOR clause that will bind it to a SELECT statement
or it will act as an alias for another curser, with the SET
statement. There are specific statements to handle cursors. More
information is in the cursor section.
The table data type is an alternative way to create a temporary
table. The variable declaration requires the column definition for
the table and it creates a temporary table in tempdb. More
information is in the temporary table section.
The above book excerpt is from:
Turbocharge Database Performance with C++ External Procedures
Joseph Gama, P. J. Naughter