Question { HCL, 19838 }

What is the difference between a Local temporary table and a
Global temporary table? How is each one used?

Answer

A local temporary table exists only for the duration of a
connection or, if defined inside a compound statement, for
the duration of the compound statement.

A global temporary table remains in the database
permanently, but the rows exist only within a given
connection. When connection is closed, the data in the
global temporary table disappears. However, the table
definition remains with the database for access when
database is opened next time.