网站模版如何使用,wordpress 4.8.4 漏洞,企业建设网站的过程,园林景观设计公司官网目录
0 需求描述 2 数据准备
3 问题分析
4 小结 0 需求描述
-- 按照 日期，省份，等级 分组 求分数的平均值；但是需要剔除当前行的数据 2 数据准备
create table avgtest as (select 2024-10-24 as cdate, 广东 as province,深圳 as city, 2 as level, 200 as scoreunio…目录
0 需求描述
2 数据准备
3 问题分析
4 小结 0 需求描述
-- 按照 日期，省份，等级 分组 求分数的平均值；但是需要剔除当前行的数据 2 数据准备
create table avgtest as (select '2024-10-24' as cdate, '广东' as province,'深圳' as city, '2' as level, 200 as scoreunion allselect '2024-10-24' as cdate, '广东' as province,'广州' as city, '3' as level, 300 as scoreunion allselect '2024-10-24' as cdate, '广东' as province,'湛江' as city, '4'
