https://www.nowcoder.com/practice/5b4018c47dfd401d87a5afb5ebf35dfd?tpId=375&tags=&title=&difficulty=0&judgeStatus=0&rp=0&sourceUrl=%2Fexam%2Foj%3FquestionJobId%3D10%26subTabName%3Donline_coding_page
查询连续入住多晚客户的信息
首先要读懂题目意思,‘多晚’意味着住一天的不能算,还有就是日期差可用DATEDIFF,用法是DATEDIFF(end_date, start_date)
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