mysql - 选择计费小时数和非计费小时数

Question

我是从数据库开始的，所以请善待我。我想写的应用程序看起来很简单，我尝试过，但失败了。

这是我的问题: 我有这个:

表:员工

# | Colonne | Type | Interclassement | Attributs | Null | Défaut | Extra | Action
1 | Id | int(11) | no | Aucune | AUTO_INCREMENT
2 | Name | varchar(50) | latin1_swedish_ci | yes | NULL
3 | Firstname | varchar(50) | latin1_swedish_ci | yes | NULL | 
4 | IdNumber | int(11) | yes | NULL
5 | Mail | varchar(50) | latin1_swedish_ci | no | Aucune | 
6 | PassWord | varchar(50) | latin1_swedish_ci | no | Aucune | 
7 | Site | varchar(50) | latin1_swedish_ci | yes | NULL | 
8 | Entrance | date | yes | NULL | 
9 | Departure | date | yes | NULL | 
10 | Car_Id | int(11) | yes | NULL | 
11 | Profil_Id | int(11) | yes | NULL | 

表:插补

# | Colonne | Type | Interclassement | Attributs | Null | Défaut | Extra | Action
1 | Id | int(11) | | | no | Aucune | AUTO_INCREMENT
2 | Hours | int(11) | | | yes | NULL | 
3 | Description | varchar(256) | latin1_swedish_ci | | yes | NULL | 
4 | ToBeBilled | tinyint(1) | | | yes | 1 | 
5 | BillNumber | int(11) | | | yes | NULL | 
6 | Day | date | | | yes | NULL | 
7 | TimeSheet_Id | int(11) | | | no | Aucune | 
8 | Project_Id | int(11) | | | no | Aucune | 
9 | automatic | tinyint(1) | | | no | 0 | 

表:时间表

# | Colonne | Type | Interclassement | Attributs | Null | Défaut | Extra | Action
1 | Id | int(11) | | | no | Aucune | AUTO_INCREMENT
2 | Month | int(2) | | | yes | NULL | 
3 | Year | int(4) | | | yes | NULL | 
4 | Filled | tinyint(1) | | | yes | 0 | 
5 | Closed | tinyint(1) | | | yes | 0
6 | Employee_Id | int(11) | | | no | Aucune | 

我想达到以下结果:

________________________________________________________
Name     | Billable hours | Non-billable hours | Total hours
________________________________________________________
John Doe | 872            | 142                | 1014
 ________________________________________________________

计费时间是指 ToBeBilled 行 = true 的时间。不可计费时间为 ToBeBilled 行 = false。

这是我当前正在处理的 SQL 查询(我使用 FlySpeed ​​SQL Query 工具来帮助我构建 SQL 查询):

Select
   Employee.Name,
  Sum( Imputation.Hours),
   Imputation.ToBeBilled
From
   Employee Inner Join
   TimeSheet On  TimeSheet.Employee_Id =  Employee.Id,
   Imputation
Where
   Imputation.ToBeBilled = 'true'
Group By
   Employee.Name,  Imputation.ToBeBilled
Order By
   Employee.Name

<小时/>

经过帮助，这是最终的查询:

Select
  Employee.Name As Name,
  Sum(Case When Imputation.ToBeBilled = '1' Then Imputation.Hours End) As `Billable`,
  Sum(Case When Imputation.ToBeBilled = '0' Then Imputation.Hours End) As `NonBillable`,
  Sum(Imputation.Hours) As `Total`
From
  Employee Inner Join
  TimeSheet On TimeSheet.Employee_Id = Employee.Id Inner Join
  Imputation On Imputation.TimeSheet_Id = TimeSheet.Id
Group By
  Employee.Name, Employee.Id
Order By
  Name

Answer 1

SELECT
  Employee.Name,
  Sum(CASE WHEN Imputation.ToBeBilled = 'true' THEN Imputation.Hours END) As Billable_hours,
  Sum(CASE WHEN Imputation.ToBeBilled != 'true' THEN Imputation.Hours END) As NonBillable_hours,
  SUM(Imputation.Hours) As total_hours
FROM
  Employee INNER JOIN TimeSheet
  On TimeSheet.Employee_Id =  Employee.Id
  INNER JOIN Imputation
  ON Imputation.TimeSheet_Id=TimeSheet.id
GROUP BY
  Employee.Id, Employee.Name
ORDER BY
  Employee.Name