Global temporary tables
Global temporary tables are distinct within SQL sessions.
The basic syntax is:
    CREATE GLOBAL TEMPORARY TABLE table_name ( ...);

For example:
    CREATE GLOBAL TEMPORARY TABLE supplier
    (     supplier_id     numeric(10)     not null,
        supplier_name     varchar2(50)     not null,
        contact_name     varchar2(50)    
    )            
This would create a global temporary table called supplier .

Local Temporary tables
Local temporary tables are distinct within modules and embedded SQL programs within SQL sessions.
The basic syntax is:
    DECLARE LOCAL TEMPORARY TABLE table_name ( ...);