Why do we use global temporary table in Oracle?
Enhancing security and privacy: In sensitive businesses, GTT is invaluable because it only saves data for the session and the same cannot be queried by other users. Quicker data retrieval: During a session, you can store your data in a tabular form in the temporary table and access it instantly when you need it.
What is a temporary table in Oracle?
In Oracle a Global Temporary Table (GTT) is a permanent metadata object that holds rows in temporary segments on a transaction-specfic or session-specific basis. It is not considered normal to create and drop GTTs on the fly.
How many types of temporary tables are there?
2 types
There are 2 types of Temporary Tables: Local Temporary Table, and Global Temporary Table.
How to create and use temporary table in Oracle stored procedure?
Just create it first (once, outside of your procedure), and then use it in your procedure. You don’t want to (try to) create it on every call of the procedure. I have edited this answer as it was wrong.
Where does Oracle store the data in the global temporary table?
Oracle allows you to create indexes on global temporary tables. However, the data in the index has the same scope as the data stored in the global temporary table, which exists during a transaction or session. By default, Oracle stores the data of the global temporary table in the default temporary tablespace of the table’s owner.
How to create a temporary table in Oracle 18c?
Note that Oracle 18c introduced the private temporary table, which is a memory-based temporary table that is automatically dropped at the end of a session or transaction. To create a global temporary table, you use the CREATE GLOBAL TEMPORARY TABLE statement as follows:
Can you create an index on a global temporary table?
Oracle global temporary tables & indexes. Oracle allows you to create indexes on global temporary tables. However, the data in the index has the same scope as the data stored in the global temporary table, which exists during a transaction or session. Global temporary table tables & tablespaces