Updating identity column
The temporary table definition persists in the same way as the definitions of regular tables, but the table segment and any data the table contains are either keyword is valid only if you are creating this table as part of a hash cluster and only for columns that are also cluster columns.
This clause instructs the database to sort the rows of the cluster on this column after applying the hash function when performing a DML operation. Rather, the database derives the values in a virtual column on demand by computing a set of expressions or functions.
The IM column store does not replace the buffer cache, but acts as a supplement so that both memory areas can store the same data in different formats.
The IM column store is available starting with Oracle Database 12 clause is applicable only if you are using Oracle Real Application Clusters (Oracle RAC).
It controls how table data in the IM column store is distributed across Oracle RAC instances.
You can specify the following options: clause is applicable only if you are using Oracle Real Application Clusters (Oracle RAC) on an engineered system.
These privileges must be granted explicitly and not acquired through a role.
They can be indexed, and you can collect statistics on them. Exceptions and restrictions are listed below in "Notes on Virtual Columns" and "Restrictions on Virtual Columns".When you first create a temporary table, its table metadata is stored in the data dictionary, but no space is allocated for table data.Space is allocated for the table segment at the time of the first DML operation on the table.If a query is compiled in an edition outside the usable range of editions for the virtual column, then the optimizer will not consider using the index.based on whether they are considered valid as of a specified time, before a specified time, or during a specified time period.
You need these privileges because Oracle Database creates an index on the columns of the unique or primary key in the schema containing the table.