Specifying column definitions – PB Docs 2018

Column Name

(Required) The name by which the column will be
identified.

Data Type

(Required) Select a datatype from the drop-down
list. All datatypes supported by the current DBMS are
displayed in the list.

Width

For datatypes with variable widths, the number of
characters in the field.

Dec

For numeric datatypes, the number of decimal
places to display.

Null

Select Yes or No from the Null drop-down list to
specify whether NULLs are allowed in the column. Specifying No
means the column cannot have null values; users must supply a
value. No is the default in a new table.

Default

The value that will be placed in a column in a
row that you insert into a DataWindow object. The drop-down
list has built-in choices, but you can type any other value.
For an explanation of the built-in choices, see your DBMS
documentation.