Definition of Tables

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.

 

Table 5.2: Commands to Define Tables

Command	Description
CREATE/TABLE	Create a table with specified size.
CREATE/COLUMN	Create a column.
DELETE/COLUMN	Delete column(s).

 

Some commands use internal tables to store results. In such cases the tables will be created and defined by the system according to defaults. Labels, display formats and units in an existing column are modified by the NAME/COLUMN command.