select sClass 班级,count(*) 班级学生总人数,sum(case when sGender=0 then 1 else 0 end) 女生人数,sum(case when sGender=0 then 1 else 0 end)*1.0/count(*)女生所占比例,sum ...
需求:需统计出某个集合内,某个段所占的比例,涉及SELECT查询语句的嵌套,如有疑问可留言。 如下: 按性别进行年度挂号年龄段分析 男SELECT 年龄段,SUM 人数 数量,cast cast SUM 人数 select count from YXHIS ..VTBMZGHMX WHERE BTH AND CXB 男 . as decimal , as varchar 所占比例 FROM SEL ...
2021-03-02 16:40 0 642 推荐指数:
select sClass 班级,count(*) 班级学生总人数,sum(case when sGender=0 then 1 else 0 end) 女生人数,sum(case when sGender=0 then 1 else 0 end)*1.0/count(*)女生所占比例,sum ...
select sClass 班级,count(*) 班级学生总人数, sum(case when sGender=0 then 1 else 0 end) 女生人数, sum(case when sGender=0 then 1 else 0 end)*1.0/count(*)女生所占比例 ...
输出结果: numOfTotal numOfMale numOfFemale percentOfMale perscentOfFemale18 14 4 0. ...
select nnd as '年龄段',count(*) as '人数',sex as '性别' from(selectcasewhen age>=1 and age<=10 then '1-10'when age>=11 and age<=20 then '11-20 ...
复杂的sql语句,按部门统计人数: ...
For rebuilding index, here is also a script to figure out the fragmentation and decide whether rebui ...
第一种方法: SELECT user.sex, count(user.sex) as 总数 FROM test.user group by user.sex; `` 第二种方法: 说明: ...
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