Question

我想得到所有卷的总和，但我不知道如何得到加仑/秒与升/秒或毫升/秒的总和。

我使用这个SQL查询：

 public void mousePressed(MouseEvent e , int tankid) { 
     System.out.println("insert which tanks you want to move");
      JButton clicked = (JButton)e.getSource();
      System.out.println(clicked.getAlignmentX()+"mmmmmmmmmmm");
        for(int x = 0; x<board.r; x++)
        {
            for(int y = 0;y<board.cc;y++)
            {
                if(clicked == board.squares[x][y])
                {

                             ImageIcon icon = new ImageIcon("C:/Users/win_10/Desktop/tanks/tank1.png");
                             board.squares[troops[tankid].getPosition().x][troops[tankid].getPosition().y].setIcon(null);
                             board.squares[x][y].setIcon(icon);
                             map.mapboard[troops[tankid].getPosition().x][troops[tankid].getPosition().y].setBackground(null);
                             troops[i].getPosition().x = x;
                             troops[i].getPosition().x = y;
                             map.mapboard[troops[tankid].getPosition().x][troops[tankid].getPosition().x].add(new JLabel(name));
                             SwingUtilities.updateComponentTreeUI(map.getContentPane());
                   System.out.println(x + " "+ y);  
                }
            }
        }
    }

这是我的示例数据：

    SELECT CONCAT(TRIM(SUM(Raw_Quantity * 
        CASE WHEN Unit_Name= 'mL/s'     THEN 1
             WHEN Unit_Name= 'liter/s'  THEN 1000
             WHEN Unit_Name= 'gallon/s' THEN 3.785
        END)) / 1000, ' liter/s') 
      WHEN TRIM(SUM(Raw_Quantity * 
        CASE WHEN Unit_Name= 'mL/s'     THEN 1
             WHEN Unit_Name= 'liter/s'  THEN 1000
             WHEN Unit_Name= 'gallon/s' THEN 3.785
        END)) + 0 >= 1 
      THEN CONCAT(TRIM(SUM(Raw_Quantity * 
        CASE WHEN Unit_Name= 'mL/s'     THEN 1
             WHEN Unit_Name= 'liter/s'  THEN 1000
             WHEN Unit_Name= 'gallon/s' THEN 3.785
        END)) / 1, ' mL/s')
      WHEN TRIM(SUM(Raw_Quantity *
        CASE WHEN Unit_Name= 'mL/s'     THEN 1
             WHEN Unit_Name= 'liter/s'  THEN 1000
             WHEN Unit_Name= 'gallon/s' THEN 3.785
        END)) + 0 >= 3.785
      THEN CONCAT(TRIM(SUM(Raw_Quantity *
        CASE WHEN Unit_Name= 'mL/s'     THEN 1
             WHEN Unit_Name= 'liter/s'  THEN 1000
             WHEN Unit_Name= 'gallon/s' THEN 3.785
        END)) / 3.785, ' gallon/s')
      END) AS 'QUANTITY',
      GROUP_CONCAT(
        CASE WHEN Unit_Name = 'liter/s' AND Raw_Expiration_Date.Raw_Quantity < 1     THEN 'mL/s'
             WHEN Unit_Name = 'gallon/s' AND  Raw_Expiration_Date.Raw_Quantity < 1     THEN 'liter/s'
             WHEN Unit_Name = 'liter/s' AND  Raw_Expiration_Date.Raw_Quantity > 3.785 THEN 'gallon/s'
             ELSE Unit_Name
        END) SEPARATOR '') AS 'Raw_Expiration_Date'
      FROM Raw_Expiration_Date
INNER JOIN Raw_Material_Table ON Raw_Expiration_Date.Raw_ID = Raw_Material_Table.Raw_ID
INNER JOIN unit_table ON unit_table.Unit_ID = raw_expiration_date.Unit_ID
  GROUP BY Raw_Material_Table.Raw_ID
  ORDER BY Raw_Name ASC;

但是，结果不正确：

9.5786523升/秒

我认为我的错误在于如何计算加仑/秒。我在这些计算中做错了什么？

Answer 1

如果确实有3.785升加仑，那么问题是你的加仑乘数是3.785，但应该是3785.0

如何在Mysql中获取所有卷的总和？

1 个答案: