Introduction to Database System
In SQL, the CREATE TABLESPACE is used

None of these
to add/rename data files, to change storage
to create a database trigger
to create a place in the database for storage of scheme objects, rollback segments, and naming the data files to comprise the tablespace
All of these

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Introduction to Database System
In a large DBMS

all of the listed here
each user can "see" only a small part of the entire database
each subschema contains every field in the logical schema
each user can access every sub¬schema

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