在使用Spring-Data MongoDB嘗試將Object保存到mongo數據庫時,我得到了這個異常。 Ambiguous field mapping detected! Both <child class field> and <parent class field> map to the same field name <field name>! Disambiguate using @D
我有以下mysql語句,但我想用它與java的spring mongodb驅動程序。如何轉換它?看過聚合但不知道如何。 SELECT SUM(CASE WHEN CreatedTime BETWEEN ('7:00:00' AND '7:14:59') THEN 1 ELSE 0) as firstCount,
SUM(CASE WHEN CreatedTime BETWEEN ('7