CRM/CoreDiscountcivicrm_discountStores discounts for events on the basis of date2.1true id int unsigned true primary key Number 2.1 id true entity_table varchar 64 CRM_Core_BAO_Discount::entityTables true physical tablename for entity being joined to discount, e.g. civicrm_event 2.1 entity_id int unsigned true FK to entity table specified in entity_table column. 2.1 entity_id entity_table 2.1 index_entity entity_table entity_id 2.1 price_set_id participant_discount_name int unsigned true civicrm_price_set id title true FK to civicrm_price_set Price Set Select entity_id 4.3 price_set_id civicrm_price_set id 4.3 CASCADE index_entity_option_id entity_table entity_id price_set_id 2.1 start_date date Date when discount starts. 2.1 end_date date Date when discount ends. 2.1