Question

我正在使用SUM()计算同一个表中两列的总和，但最终结果是一个整数（286676）。我猜它是毫秒？如何转换为TIME（00:00:00）？

数据库

id|hours_worked | hours_worked_wk2 |

hours_worked = 14:33:38 hours_worked_wk2 = 14:33:38

查询

SELECT *,SEC_TO_TIME(SUM(TIME_TO_SEC(ep.hours_worked)))+SEC_TO_TIME(SUM(TIME_TO_SEC(ep.hours_worked_wk2))) 
AS TotalHoursWorked 
FROM employeepayroll ep 
JOIN employees em ON ep.employee_id=em.employee_id 
JOIN payroll p ON ep.payroll_id=p.payroll_id 
JOIN payrolltaxes pt ON ep.payroll_id=pt.payroll_id 
WHERE ep.timesheet_status='Approved' AND p.pay_group='26' 
ORDER BY ep.payroll_id DESC

TotalHoursWorkd = 286676

Answer 1

使用以下公式。

hours = cast(duration_in_milliseconds \ (60 * 60 * 1000) as int)  
mins = (duration_in_milliseconds \ (60 * 1000)) mod 60  
secs = (duration_in_milliseconds \ 1000) mod 60

您的查询将如下所示：

select cast(duration_in_milliseconds\(60*60*1000) as int)+':'((duration_in_milliseconds \ (60*1000)) mod 60;)+':'((duration_in_milliseconds \ 1000) mod 60) from something

Answer 2

当你看到它时......

14:33:38 >>> 143,338 × 2 = 286,676

让人惊讶。时间中的数字被隐式地转换为整数。

您要添加SEC_TO_TIME(SUM(...))+SEC_TO_TIME(SUM(...))的两个值。

相反，请使用SEC_TO_TIME(SUM(...) + SUM(...))。

Mysql SUM（）TIME格式错误

2 个答案: