Description:
assign a price to an article, which can be updated by time

PRIMARY KEY
a_ar_article_code_c varchar (100) NOT NULL	code that identifies the item to be sold or service to be charged	a_ar_article
a_ar_date_valid_from_d date NOT NULL	date from which this price is valid

a_ar_amount_n numeric (24, 10) NOT NULL	the value of the item in base currency
a_currency_code_c varchar (16) NOT NULL	the currency in which the price is given	a_currency
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_article_price_fkcr: s_created_by_c => s_user a_ar_article_price_fkmd: s_modified_by_c => s_user ar_article_price_fk1: a_ar_article_code_c => a_ar_article ar_article_price_fk2: a_currency_code_c => a_currency
REFERENCED BY a_ar_invoice_detail