COUNT(CASE WHEN score>=90 THEN `name` ELSE NULL END) AS A, COUNT(CASE WHEN score>=80 AND score<90 THEN `name` ELSE NULL END) AS B, COUNT(CASE WHEN score>=70 AND score<80 THEN `name` ELSE NULL END) AS C, COUNT(CASE WHEN score<70 THEN `name` ELSE NULL END) AS D FROM st...
SQL中SUM函数和CASE WHEN联合使用 SELECT SUM(case WHEN sex=1 then 1 else 0 end )as '男生', SUM(case when sex =2 then 1 else 0 end )'女生'FROM asex 这句sql输出的就是男女生的人数(1代表男生,2代表女生),SUM(case WHEN sex=1 then 1 else 0 end )这句话的含义就是统计sex列中值为1...
select Name, case 胜负 when '胜' then 1 else 0 as SF end from b 显示的内容为 Name SF 张三1 李四1 张三1 张三0 王五1 赵六0 把数字进行加法运算需要用到 sum 是根据Name 合并组的 select Name,sum(case 胜负 when '胜' then 1 else 0 end) as '胜利的次数' from b group by Name 显示...
,NULL AS BM ,SUM(CASE WHEN IS_SB = 'Y' THEN 1 ELSE 0 END) AS IS_SB ,SUM(CASE WHEN IS_DF = 'Y' THEN 1 ELSE 0 END) AS IS_DF ,MIN(DK) - 0.5 AS DK ,MIN(RN) - 0.5 AS RN FROM TEMP GROUP BY CONCAT(GS, '汇总:') UNION ALL SELECT * FROM TEMP ) T1 ORDER BY DK, ...
sql case when then else end 查询生成统计列表: SELECT a.managecom, a.subtype, count(*) loadsucc, sum(case when a.state in ('4', '5', '6', '7', '8', '9') then 1 else 0 end) recogsucc, sum(case when a.state in ('3', '12', '13') then 1 else 0 end) recogfail,...
sum(case when a.state in ('4', '5', '6', '7', '8', '9') then 1 else 0 end) recogsucc, sum(case when a.state in ('3', '12', '13') then 1 else 0 end) recogfail, sum(case when a.state in ('1', '2') then 1 else 0 end) waitrecog ...
一、CASE WHEN语句的基本结构 CASE WHEN语句的基本结构如下所示:CASE WHEN condition1 THEN result1 WHEN condition2 THEN result2 …ELSE resultn END 这个语法中,我们首先使用CASE关键字开头,然后根据不同的条件使用WHEN关键字,并在每个条件后面指定结果。如果所有条件都不满足,就返回ELSE子句中指定的结果。最后...
sum(case when 成绩>=60 then 1 else 0 end) as 及格人数, sum(case when 成绩 < 60 then 1 else 0 end) as 不及格人数 from score group by 课程号; 使用分段[100-85],[85-70],[70-60],[<60]来统计各科成绩,分别统计:各分数段人数,课程号和课程名称 ...
【sql】之case when then else end,selecta.`name`,sum((CASEkemuWHEN'语文'THENscoreELSE0END))'语文',sum((CASEkemuWHEN'数学