External tables are created as described in the previous section and
the definition of their content is taken from the format file specified.
To create a user table one can also use the CREATE/TABLE command
by giving NULL as input. This will create a table of the specified
size where all elements are NULL.
Columns in a table can be created or deleted by using the commands
CREATE/COLUMN and DELETE/COLUMN.
The available commands are collected in
Table 5.2.
Command | Description |
---|---|
CREATE/TABLE | Create a table with specified size. |
CREATE/COLUMN | Create a column. |
DELETE/COLUMN | Delete column(s). |