Question

我在MySQL或数据库方面远非强大，所以我使用的是一个名为FlySpeed SQL Query的工具。这个工具帮助我以图形方式创建MySQL查询。以下是我使用此工具创建的查询以及在互联网上的大量阅读。

Select
  Employee.Firstname As Prénom,
  Employee.Name As NOM,
  TimeSheet.Filled As Validé,
  TimeSheet.Closed As Clôturé,
  Sum(Imputation.Hours) As `Somme des heures`,
  TimeSheet.Month + 1 As Mois,
  TimeSheet.Year As Année
From
  Employee Inner Join
  TimeSheet On TimeSheet.Employee_Id = Employee.Id Inner Join
  Imputation On Imputation.TimeSheet_Id = TimeSheet.Id Inner Join
  Project On Imputation.Project_Id = Project.Id
Where
  TimeSheet.Filled = '1' And
  (TimeSheet.Closed = '0' Or
    TimeSheet.Closed Is Null) And
  Imputation.Day <= Last_Day(Current_Date - Interval 1 Month) And Imputation.Day >= Date_Format(Current_Date - Interval 1 Month, '%Y-%m-01') And
  Project.Id != '1'
Group By
  Employee.Name, TimeSheet.Month + 1, TimeSheet.Year
Having
  Sum(Imputation.Hours) >= 5 * ((DateDiff(Last_Day(Current_Date - Interval 1 Month), Date_Format(Current_Date - Interval 1 Month, '%Y-%m-01')) + 1))
Order By
  Année,
  Mois,
  NOM

此查询返回了我想要的结果。保持与上述MySQL查询相同的条件，我想将Closed字段更新为“1”。我想在那里品尝一些东西：

-- UPDATE Query
--
UPDATE TimeSheet
SET Closed = '1'
--
-- UPDATE Query
From
Employee Inner Join
TimeSheet On TimeSheet.Employee_Id = Employee.Id Inner Join
Imputation On Imputation.TimeSheet_Id = TimeSheet.Id Inner Join
Project On Imputation.Project_Id = Project.Id
--
-- With those conditions
--
Where
TimeSheet.Filled = '1' And
(TimeSheet.Closed = '0' Or
    TimeSheet.Closed Is Null) And
-- Calculating a time range
Imputation.Day <= Last_Day(Current_Date - Interval 1 Month) And Imputation.Day >= Date_Format(Current_Date - Interval 1 Month, '%Y-%m-01') 
And
Project.Id != '1'
Group By
Employee.Name, TimeSheet.Month + 1, TimeSheet.Year
Having
-- Calculation : >= 5 times the number of days in the period
Sum(Imputation.Hours) >= 5 * ((DateDiff(Last_Day(Current_Date - Interval 1 Month), Date_Format(Current_Date - Interval 1 Month, '%Y-%m-01')) + 1))
---
-- With those conditions

所以我需要帮助才能将SELECT查询转换为UPDATE查询。请随时向我索取更多信息。

Answer 1

尝试在set：

之后移动joins操作

UPDATE TimeSheet Inner Join 
   Employee On TimeSheet.Employee_Id = Employee.Id Inner Join
   Imputation On Imputation.TimeSheet_Id = TimeSheet.Id Inner Join
   Project On Imputation.Project_Id = Project.Id
--
-- With those conditions
--
SET TimeSheet.Closed = '1'
Where
    TimeSheet.Filled = '1' And
    (TimeSheet.Closed = '0' Or
    TimeSheet.Closed Is Null) And
    -- Calculating a time range
    Imputation.Day <= Last_Day(Current_Date - Interval 1 Month) And Imputation.Day >= Date_Format(Current_Date - Interval 1 Month, '%Y-%m-01') 
    And
    Project.Id != '1'
Group By
    Employee.Name, TimeSheet.Month + 1, TimeSheet.Year
Having
    -- Calculation : >= 5 times the number of days in the period
    Sum(Imputation.Hours) >= 5 * ((DateDiff(Last_Day(Current_Date - Interval 1 Month), Date_Format(Current_Date - Interval 1 Month, '%Y-%m-01')) + 1))
    ---

Answer 2

我终于找到了解决问题的方法。

这篇文章给了我很多帮助：http://www.codeproject.com/Tips/831164/MySQL-can-t-specify-target-table-for-update-in-FRO

这是：

UPDATE TimeSheet 
SET 
    Closed = '1'
WHERE
    TimeSheet.Id IN (SELECT 
            TimeSheet.Id
        FROM
            (SELECT 
                TimeSheet.Id
            FROM
                TimeSheet
            Where
                TimeSheet.Id IN (SELECT 
                        TimeSheet.Id
                    FROM
                        Imputation
                    INNER JOIN TimeSheet ON Imputation.TimeSheet_Id = TimeSheet.Id
                    INNER JOIN Project ON Imputation.Project_Id = Project.Id
                    INNER JOIN Employee ON TimeSheet.Employee_Id = Employee.Id
                    Where
                        (TimeSheet.Closed = '0'
                            OR TimeSheet.Closed IS NULL)
                            AND TimeSheet.Filled = '1'
                            AND Imputation.Day <= Last_Day(Current_Date - INterval 1 Month)
                            AND Imputation.Day >= Date_Format(Current_Date - INterval 1 Month, '%Y-%m-01')
                    GROUP BY TimeSheet.Id
                    HAVING TimeSheet.Id NOT IN (SELECT DISTINCT
                            TimeSheet.Id
                        FROM
                            TimeSheet
                        INNER JOIN Imputation ON Imputation.TimeSheet_Id = TimeSheet.Id
                        INNER JOIN Project ON Imputation.Project_Id = Project.Id
                        INNER JOIN Employee ON TimeSheet.Employee_Id = Employee.Id
                        Where
                            Imputation.Day <= Last_Day(Current_Date - INterval 1 Month)
                                AND Imputation.Day >= Date_Format(Current_Date - INterval 1 Month, '%Y-%m-01')
                                AND Project.Id = '1')
                        AND Sum(Imputation.Hours) >= 5 * (DateDiff(Last_Day(Current_Date - INterval 1 Month), Date_Format(Current_Date - INterval 1 Month, '%Y-%m-01')) + 1))) VirtualTable01);

然而，术语＆＃34;解决方案＆＃34;也许有点强大。我会说更多它是一种解决方法。所以我不确定这个要求是否得到了很好的优化并且符合标准，但至少它有利于给我所需的结果。

与上述查询相同，但评论如下：

-- UPDATE Query
--
UPDATE TimeSheet 
SET 
    Closed = '1'
--
-- UPDATE Query
--
-- With those conditions
--
WHERE
    -- First Select
    --
    TimeSheet.Id IN (SELECT 
            TimeSheet.Id
        FROM
            -- Second Select
            --
            (SELECT 
                TimeSheet.Id
            FROM
                TimeSheet
            Where
                -- Third Select
                --
                TimeSheet.Id IN (SELECT 
                        TimeSheet.Id
                    FROM
                        Imputation
                    INNER JOIN TimeSheet ON Imputation.TimeSheet_Id = TimeSheet.Id
                    INNER JOIN Project ON Imputation.Project_Id = Project.Id
                    INNER JOIN Employee ON TimeSheet.Employee_Id = Employee.Id
                    Where
                        (TimeSheet.Closed = '0'
                            OR TimeSheet.Closed IS NULL)
                            AND TimeSheet.Filled = '1'
                            AND Imputation.Day <= Last_Day(Current_Date - INterval 1 Month)
                            AND Imputation.Day >= Date_Format(Current_Date - INterval 1 Month, '%Y-%m-01')
                    GROUP BY TimeSheet.Id
                    -- Fourth Select
                    --
                    HAVING TimeSheet.Id NOT IN (SELECT DISTINCT
                            TimeSheet.Id
                        FROM
                            TimeSheet
                        INNER JOIN Imputation ON Imputation.TimeSheet_Id = TimeSheet.Id
                        INNER JOIN Project ON Imputation.Project_Id = Project.Id
                        INNER JOIN Employee ON TimeSheet.Employee_Id = Employee.Id
                        Where
                            Imputation.Day <= Last_Day(Current_Date - INterval 1 Month)
                                AND Imputation.Day >= Date_Format(Current_Date - INterval 1 Month, '%Y-%m-01')
                                AND Project.Id = '1')
                    --
                    -- End Fourth Select
                        AND Sum(Imputation.Hours) >= 5 * (DateDiff(Last_Day(Current_Date - INterval 1 Month), Date_Format(Current_Date - INterval 1 Month, '%Y-%m-01')) + 1))
                -- 
                -- End Third Select
                            ) VirtualTable01)
            -- 
            -- End Second Select
    -- 
    -- End First Select
;

MySQL - 在多个表上基于SELECT Query编写UPDATE查询

2 个答案: