The NUMERIC directive allows you to treat a data item as an unsigned integer when it is declared as alphanumeric. You might use this when the data stored in the item is always numeric.
The PATIENT-ID field (now appearing in the database table as the PATIENT column) is defined in the source code as being a text field. Since this field will always contain a number, you may want to define it in the database table as numeric. (Note the use of two directives for the same data item here.)
FILE SECTION. FD jr-file. $XFD COMMENT This sample file demonstrates directives. 01 jr-record. 03 animal-info. $XFD NAME=PATIENT, NUMERIC 05 patient-id pic x(5). 05 atype pic x. 05 ctype redefines atype pic x. 05 dtype redefines atype pic x. 05 otype redefines atype pic x. 03 owner-info. 05 phone pic x(8). 05 owner pic x(30). 03 financial. 05 acct_no. 10 year pic x(2). 10 seq_no pic x(4). $XFD DATE=YYYYMMDD, USE GROUP 05 last_visit. 10 yyyy pic 9(4). 10 mm pic 9(2). 10 dd pic 9(2). $XFD HIDDEN 05 fee pic s9(5)v99.
The following table is the result, and, in the database, PATIENT is now of type NUMBER.