MySQL：什么是上限时间限制'2017-05-31 23:59:59'或'2017-05-31 24:00:00'？

Question

设置持续时间上限时应该使用什么

a）date_start between '2017-05-01 00:00:00' and '2017-05-31 23:59:59'

b）date_start between '2017-05-01 00:00:00' and '2017-05-31 24:00:00'

是a还是b？

由于

Answer 1

它将是a

date_start between '2017-05-01' and '2017-05-31 23:59:59'

，因为

2017-05-31 24:00:00
means
2017-06-01 00:00:00