oracle使用between and邊界問題

如果是只查詢某兩個月之間的數據，會默認從每個月的1號開始查，包前包后

eg:select * from test_hsj where regdate between to_date('2015-05','yyyy-MM') and to_date('2015-06','yyyy-MM')

 

如果是只查詢某兩年之間的數據，會默認從1月1日開始查，包前包后

eg:select * from test_hsj where regdate between to_date('2015','yyyy') and to_date('2016','yyyy')

 

如果是只查詢數字類型或者字符類型的數據，包前包后

eg:select * from test_hsj where id between 1 and 5;