項目的購買記錄表,查詢最新的購買記錄,但由於商品還有子商品所以還要實現組查詢,實際上是查詢各個商品的最新購買時間:
select id,usr_id,item_id, max(deadline) as deadline from buy_record where user_id = 1 group by
item_id
項目的購買記錄表,查詢最新的購買記錄,但由於商品還有子商品所以還要實現組查詢,實際上是查詢各個商品的最新購買時間:
select id,usr_id,item_id, max(deadline) as deadline from buy_record where user_id = 1 group by
item_id
https://github.com/zhangbo2008/Trie_with_informationExtraction_and_fuzzy_matchingv2