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Oracle divides a database into one or more logical storage units called tablespaces. Each tablespace consists of one or more files called datafiles. A datafile physically stores the data objects of the database such as tables and indexes on disk.
A tablespace in an Oracle database consists of one or more physical datafiles. A datafile can be associated with only one tablespace and only one database. Oracle creates a datafile for a tablespace by allocating the specified amount of disk space plus the overhead required for the file header.
A tablespace is a database storage unit that groups related logical structures together. The database data files are stored in tablespaces.
1 lip 2013 · An Oracle database consists of one or more logical storage units called tablespaces, which collectively store all of the database's data. Databases, tablespaces, and datafiles are closely related, but they have important differences:
A tablespace in an Oracle database consists of one or more physical datafiles. A datafile can be associated with only one tablespace and only one database. Oracle creates a datafile for a tablespace by allocating the specified amount of disk space plus the overhead required for the file header.
Tablespace is the primary logic structure of the oracle database. It consists of one or more physical datafiles. Datafiles physical stores database data in storage. (DISKS) . So when we create a datafile of 30G in database, it will eat 30G of space from defined storage. All the table or index segment is created in tablespace only.
Tables and indexes are created within a particular tablespace. Oracle has a limit of 64,000 data files per database. When a new database is created, it will have the following tablespaces (as created by the Database Configuration Assistant): The only mandatory parameter to create tablespace in CREATE TABLESPACE statement is its name.
