请更正我的查询

Question

Select empno,sum(cast(substring(othours,0,3)as float)) as
Hour,sum(cast(substring(othours,4,5)as float)) as Minutes from tmstrans 
group by empno,othours

它显示的数据如下

• 1,10
• 1,30
• 2,10
• 2,30

我需要以下数据

• 1,40
• 2,40

请帮助

Answer 1

假设您要SUM小时和分钟列，则必须从othours子句中删除GROUP BY列。像这样测试：

SELECT empno,
       SUM(CAST(SUBSTRING(othours,0,3) AS float)) AS Hour,
       SUM(CAST(SUBSTRING(othours,4,5) AS float)) AS Minutes
FROM tmstrans 
GROUP BY empno