# 第八章 日期运算

- [8.1 加减日、月、年](/sql/di-ba-zhang-ri-qi-yun-suan/8.1-jia-jian-ri-yue-nian.md)
- [8.2 计算两个日期之间的天数](/sql/di-ba-zhang-ri-qi-yun-suan/8.2-ji-suan-liang-ge-ri-qi-zhi-jian-de-tian-shu.md)
- [8.3 确定两个日期之间的工作日数目](/sql/di-ba-zhang-ri-qi-yun-suan/8.3-que-ding-liang-ge-ri-qi-zhi-jian-de-gong-zuo-ri-shu-mu.md)
- [8.4 确定两个日期之间的月份数或年数](/sql/di-ba-zhang-ri-qi-yun-suan/8.4-que-ding-liang-ge-ri-qi-zhi-jian-de-yue-fen-shu-huo-nian-shu.md)
- [8.5 确定两个日期之间的秒、分、小时数](/sql/di-ba-zhang-ri-qi-yun-suan/8.5-que-ding-liang-ge-ri-qi-zhi-jian-de-miao-fen-xiao-shi-shu.md)
- [8.6 计算一年中周内各日期的次数](/sql/di-ba-zhang-ri-qi-yun-suan/8.6-ji-suan-yi-nian-zhong-zhou-nei-ge-ri-qi-de-ci-shu.md)
- [8.7 确定当前记录和下一条记录之间相差的天数](/sql/di-ba-zhang-ri-qi-yun-suan/8.7-que-ding-dang-qian-ji-lu-he-xia-yi-tiao-ji-lu-zhi-jian-xiang-cha-de-tian-shu.md)