https://blog.youkuaiyun.com/lanlanlannanzh-cnhttps://blog.youkuaiyun.com/https://blog.youkuaiyun.com/lanlanlannan/article/details/130215204https://blog.youkuaiyun.com/lanlanlannan/article/details/130215204lanlanlannanTue, 18 Apr 2023 10:10:58 +0800https://blog.youkuaiyun.com/lanlanlannan/article/details/130213614https://blog.youkuaiyun.com/lanlanlannan/article/details/130213614lanlanlannanTue, 18 Apr 2023 09:34:19 +0800 Structured Query Language —> 结构化查询语言。列（column）—> 字段（field） —> attribute。表（table）—> entity / relation。行（row）—> 记录（record） —> tuple。窗口函数 —> 给数据打上额外的标签 —> 开窗打标。连接查询 —> 如果要查询的字段来自于多张表。行数 —> 势（cardinality）数据的取值范围 —> 域（domain）列数 —> 度（degree）]]>https://blog.youkuaiyun.com/lanlanlannan/article/details/130213597https://blog.youkuaiyun.com/lanlanlannan/article/details/130213597lanlanlannanTue, 18 Apr 2023 09:09:11 +0800https://blog.youkuaiyun.com/lanlanlannan/article/details/130138430https://blog.youkuaiyun.com/lanlanlannan/article/details/130138430lanlanlannanThu, 13 Apr 2023 19:43:51 +0800https://blog.youkuaiyun.com/lanlanlannan/article/details/130116142https://blog.youkuaiyun.com/lanlanlannan/article/details/130116142lanlanlannanWed, 12 Apr 2023 20:44:25 +0800https://blog.youkuaiyun.com/lanlanlannan/article/details/130091284https://blog.youkuaiyun.com/lanlanlannan/article/details/130091284lanlanlannanTue, 11 Apr 2023 19:14:35 +0800https://blog.youkuaiyun.com/lanlanlannan/article/details/130089571https://blog.youkuaiyun.com/lanlanlannan/article/details/130089571lanlanlannanTue, 11 Apr 2023 17:44:19 +0800https://blog.youkuaiyun.com/lanlanlannan/article/details/130004273https://blog.youkuaiyun.com/lanlanlannan/article/details/130004273lanlanlannanFri, 07 Apr 2023 09:20:00 +0800https://blog.youkuaiyun.com/lanlanlannan/article/details/129846761https://blog.youkuaiyun.com/lanlanlannan/article/details/129846761lanlanlannanWed, 29 Mar 2023 22:09:00 +0800https://blog.youkuaiyun.com/lanlanlannan/article/details/129825293https://blog.youkuaiyun.com/lanlanlannan/article/details/129825293lanlanlannanTue, 28 Mar 2023 21:14:27 +0800https://blog.youkuaiyun.com/lanlanlannan/article/details/129823854https://blog.youkuaiyun.com/lanlanlannan/article/details/129823854lanlanlannanTue, 28 Mar 2023 20:11:59 +0800https://blog.youkuaiyun.com/lanlanlannan/article/details/129823681https://blog.youkuaiyun.com/lanlanlannan/article/details/129823681lanlanlannanTue, 28 Mar 2023 20:02:22 +0800https://blog.youkuaiyun.com/lanlanlannan/article/details/129799645https://blog.youkuaiyun.com/lanlanlannan/article/details/129799645lanlanlannanMon, 27 Mar 2023 17:20:26 +0800https://blog.youkuaiyun.com/lanlanlannan/article/details/129757700https://blog.youkuaiyun.com/lanlanlannan/article/details/129757700lanlanlannanFri, 24 Mar 2023 20:09:54 +0800https://blog.youkuaiyun.com/lanlanlannan/article/details/129757064https://blog.youkuaiyun.com/lanlanlannan/article/details/129757064lanlanlannanFri, 24 Mar 2023 19:28:11 +0800https://blog.youkuaiyun.com/lanlanlannan/article/details/129746269https://blog.youkuaiyun.com/lanlanlannan/article/details/129746269lanlanlannanFri, 24 Mar 2023 10:47:17 +0800https://blog.youkuaiyun.com/lanlanlannan/article/details/129736174https://blog.youkuaiyun.com/lanlanlannan/article/details/129736174lanlanlannanThu, 23 Mar 2023 17:57:45 +0800https://blog.youkuaiyun.com/lanlanlannan/article/details/129715311https://blog.youkuaiyun.com/lanlanlannan/article/details/129715311lanlanlannanWed, 22 Mar 2023 17:42:03 +0800https://blog.youkuaiyun.com/lanlanlannan/article/details/129696919https://blog.youkuaiyun.com/lanlanlannan/article/details/129696919lanlanlannanTue, 21 Mar 2023 20:30:44 +0800 [3, 2, 1])(注意:不要使用列表自带的逆序函数)已经三个列表分别表示5个学生的姓名、学科和班号，使用map将这个三个列表拼成一个表示每个学生班级信息的的字典。9.已经列表points中保存的是每个点的坐标(坐标是用元组表示的，第一个值是x坐标，第二个值是y坐标）已经两个列表A和B，用map函数创建一个字典，A中的元素是key，B中的元素是value。已经一个列表message, 使用reduce计算列表中所有数字的和。]]>https://blog.youkuaiyun.com/lanlanlannan/article/details/129693947https://blog.youkuaiyun.com/lanlanlannan/article/details/129693947lanlanlannanTue, 21 Mar 2023 17:59:41 +0800