Persistent Sorted Modules are extensions defined in SQL-99 that include the capability to create and drop modules of code stored in the database schema across user sessions.

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Persistent Sorted Modules are not a feature defined in SQL-99. SQL-99, also known as SQL:1999, introduced features like recursive queries and user-defined types, but not persistent sorted modules.

Persistent Sorted Modules Are Extensions Defined in SQL-99 That Include