Description:
defines which discount applies to which category to limit the options in the UI

PRIMARY KEY
a_ar_category_code_c varchar (100) NOT NULL	refers to a certain category (catering, hospitality, store, fees)	a_ar_category
a_ar_discount_code_c varchar (100) NOT NULL	code that identifies the discount	a_ar_discount

a_ar_date_valid_from_d date NOT NULL	date is only required for foreign key; this applies to all of that discount code; therefore the primary key of this table does not include the date	a_ar_discount
s_date_created_d date default: CURRENT_DATE	The date the record was created.
s_created_by_c varchar (20)	User ID of who created this record.	s_user
s_date_modified_d date	The date the record was modified.
s_modified_by_c varchar (20)	User ID of who last modified this record.	s_user
s_modification_id_t timestamp default: CURRENT_TIMESTAMP	This identifies the current version of the record.
FOREIGN KEY a_ar_discount_per_category_fkcr: s_created_by_c => s_user a_ar_discount_per_category_fkmd: s_modified_by_c => s_user ar_discount_per_category_fk1: a_ar_category_code_c => a_ar_category ar_discount_per_category_fk2: a_ar_discount_code_c;a_ar_date_valid_from_d => a_ar_discount