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(case when sGender=1 then 1 else 0 end) 男生人数, sum(case when sGender=1 then 1 else 0 end)*1.0 /coun
SELECT * FROM 表 WHERE CONVERT(Nvarchar, dateandtime, 111) = CONVERT(Nvarchar, GETDATE(), 111) ORDER BY dateandtime DESC 01.本月记录 SELECT * ROM 表 WHERE datediff(month,[dateadd],getdate())=0 02.本周记录 SELECT * FROM 表 WHERE datediff(week,[dateadd],getd