如何加快我的程序和程序？

Question

我有一个存储过程，当我在SQL Server中运行查询时，我在2秒钟内得到了结果，但是当我从程序中调用该过程时，则需要40秒钟。

调用程序时如何加快程序速度？

存储过程代码：

CREATE PROC [dbo].[SearchOrdersPrice]
    @Criteria VARCHAR(50)
AS
    SELECT 
        [Lab_Orders].ORDER_ID AS 'Order Number',
        [ORDER_DATE] AS 'Order Date',
        Patients.Patient_Name AS 'Patient Name',
        Patients.Age AS 'Patient Age',
        LabTests.TestName AS 'Test Name',
        Customers.CustName AS 'Customer Name',
        Invoice_order_no AS 'Request Form Number',
        [ORDER_DESCRIPTION] AS 'Diagnosis',
        Lab_Orders.USER_ID AS 'Requested By User',
        Order_Details.TOTAL_AMOUNT AS 'Total Amount'
    FROM 
        Lab_Orders
    INNER JOIN
        Order_Details ON Order_Details.ORDER_ID = Lab_Orders.ORDER_ID 
    INNER JOIN
        Customers ON Customers.CustId = Lab_Orders.CUSTID
    INNER JOIN
        patients ON Patients.Patient_No = Lab_Orders.patient_no
    INNER JOIN
        LabTests ON LabTests.TestId =  Order_Details.TESTID
    WHERE 
        CONVERT(VARCHAR, [Lab_Orders].ORDER_ID) + CONVERT(VARCHAR, [ORDER_DATE]) + CustName + ORDER_DESCRIPTION + TestName + USER_ID + PATIENT_NAME + CONVERT(VARCHAR, AGE) + Invoice_order_no + TOTAL_AMOUNT LIKE '%'+ @Criteria +'%'
        AND Lab_Orders.order_status = 1
    ORDER BY
        [Lab_Orders].ORDER_ID DESC

我的C＃（Windows窗体代码）：按下该按钮时有一个按钮，我调用另一个窗口并调用该过程并获取数据。

按钮处理程序代码：

private void btnSelectOrder_Click(object sender, EventArgs e)
{
    checkvalue = checkCASH.Checked;
    VIEW_ORDER_DETAILS orders = new VIEW_ORDER_DETAILS();
    orders.ShowDialog();

    if (checkCASH.Checked == true)
    {
        try
        {
            cashPatient = 1;
            this.txtOrder.Text = orders.OrdersDataGridView.CurrentRow.Cells[0].Value.ToString();
            txtOrder.Focus();
        }
        catch
        {
            MessageBox.Show("Select Order Number");
        }
    }

    if (checkCASH.Checked == false)
    {
        try
        {
            cashPatient = 2;
            this.txtOrder.Text = orders.OrdersDataGridView.CurrentRow.Cells[0].Value.ToString();
            txtOrder.Focus();
        }
        catch
        {
            MessageBox.Show("Select Order Number");
        }
    }
}

另一个窗口页面加载代码：

public VIEW_ORDER_DETAILS()
{
    InitializeComponent();
    this.Size = new Size(1700, 600);

    if (LAB_SAMPLES.checkvalue == true)
    {
        OrdersDataGridView.DataSource = order.SearchOrdersPricecash("");
    }
    else
    {
        OrdersDataGridView.DataSource = order.SearchOrdersPrice("");
    }
}

这是调用方法：

public DataTable SearchOrdersPrice(string order_id)
{
    DAL.DataAccessLayer DAL = new DAL.DataAccessLayer();
    DataTable dt = new DataTable();

    SqlParameter[] param = new SqlParameter[1];
    param[0] = new SqlParameter("@Criteria", SqlDbType.VarChar, 50);
    param[0].Value = order_id;

    dt = DAL.SelectData("SearchOrdersPrice", param);
    DAL.close();

    return dt;
}

这是DAL代码：

class DataAccessLayer
{
    SqlConnection sqlconnection;

    // this initialize the connection to the database
    public DataAccessLayer()
    {
        sqlconnection = new SqlConnection(@"");
    }

    // method to open the connection 
    public void open()
    {
        if (sqlconnection.State != ConnectionState.Open)
        {
            sqlconnection.Open();
        } 
    }

    // method to close the connection 
    public void close()
    {
        if (sqlconnection.State == ConnectionState.Open)
        {
            sqlconnection.Close();
        }
    }

    // method to read data from database 
    public DataTable SelectData(string stored_procedure, SqlParameter[] param)
    {
        SqlCommand sqlcmd = new SqlCommand();
        sqlcmd.CommandType = CommandType.StoredProcedure;
        sqlcmd.CommandText = stored_procedure;
        sqlcmd.Connection = sqlconnection;

        if (param != null)
        {
            for (int i = 0; i < param.Length; i++)
            {
                sqlcmd.Parameters.Add(param[i]);
            }
        }

        SqlDataAdapter da = new SqlDataAdapter(sqlcmd);
        DataTable dt = new DataTable();
        da.Fill(dt);

        return dt;
    }

    // Method to insert update and delete date from database 
    public void ExecuteCommand (string stored_procedure , SqlParameter[] param)
    {
        SqlCommand sqlcmd = new SqlCommand();
        sqlcmd.CommandType = CommandType.StoredProcedure;
        sqlcmd.CommandText = stored_procedure;
        sqlcmd.Connection = sqlconnection;

        if (param != null)
        {
            sqlcmd.Parameters.AddRange(param);
        }

        sqlcmd.ExecuteNonQuery();
    }
}

我尝试通过使用参数嗅探解决问题，但不能解决问题：

ALTER proc [dbo].[SearchOrdersPrice]
@Criteria varchar(50)
as
begin 
declare @localCriteria varchar(50) 
set @localCriteria = @Criteria

SELECT [Lab_Orders].ORDER_ID as 'Order Number'
      ,[ORDER_DATE] as 'Order Date'
      ,Patients.Patient_Name as 'Patient Name'
      ,Patients.Age as 'Patient Age'
      ,LabTests.TestName as 'Test Name'
      ,Customers.CustName as 'Customer Name'
      ,Invoice_order_no as 'Request Form Number'
      ,[ORDER_DESCRIPTION] as 'Diagnosis'
      ,Lab_Orders.USER_ID as 'Requested By User'
      ,Order_Details.TOTAL_AMOUNT as 'Total Amount'


  FROM Lab_Orders
  inner join Order_Details on Order_Details.ORDER_ID= Lab_Orders.ORDER_ID 
  inner join Customers on Customers.CustId = Lab_Orders.CUSTID
  inner join patients on Patients.Patient_No = Lab_Orders.patient_no
  inner join LabTests on LabTests.TestId =  Order_Details.TESTID

where CONVERT(varchar,[Lab_Orders].ORDER_ID) + CONVERT(varchar,[ORDER_DATE]) + CustName+ORDER_DESCRIPTION+TestName+
       + USER_ID + PATIENT_NAME + CONVERT (varchar,AGE)+Invoice_order_no+TOTAL_AMOUNT like '%'+ @localCriteria +'%'
and Lab_Orders.order_status=1
order by [Lab_Orders].ORDER_ID desc
end

然后我从存储过程中删除了该参数，并且在调用该过程时仍然花费了40秒：

ALTER proc [dbo].[SearchOrdersPrice]
as

SELECT [Lab_Orders].ORDER_ID as 'Order Number'
      ,[ORDER_DATE] as 'Order Date'
      ,Patients.Patient_Name as 'Patient Name'
      ,Patients.Age as 'Patient Age'
      ,LabTests.TestName as 'Test Name'
      ,Customers.CustName as 'Customer Name'
      ,Invoice_order_no as 'Request Form Number'
      ,[ORDER_DESCRIPTION] as 'Diagnosis'
      ,Lab_Orders.USER_ID as 'Requested By User'
      ,Order_Details.TOTAL_AMOUNT as 'Total Amount'


  FROM Lab_Orders
  inner join Order_Details on Order_Details.ORDER_ID= Lab_Orders.ORDER_ID 
  inner join Customers on Customers.CustId = Lab_Orders.CUSTID
  inner join patients on Patients.Patient_No = Lab_Orders.patient_no
  inner join LabTests on LabTests.TestId =  Order_Details.TESTID

where Lab_Orders.order_status=1
order by [Lab_Orders].ORDER_ID desc

Answer 1

要提高性能，您可以使用With Recompile尝试存储过程，如下面的代码所示；希望这项工作对您有用。

CREATE PROCEDURE [dbo].[SearchOrdersPrice]
    @Criteria VARCHAR(50)
WITH RECOMPILE
AS
    SELECT 
        [Lab_Orders].ORDER_ID AS 'Order Number',
        [ORDER_DATE] AS 'Order Date',
        Patients.Patient_Name AS 'Patient Name',
        Patients.Age AS 'Patient Age',
        LabTests.TestName AS 'Test Name',
        Customers.CustName AS 'Customer Name',
        Invoice_order_no AS 'Request Form Number',
        [ORDER_DESCRIPTION] AS 'Diagnosis',
        Lab_Orders.USER_ID AS 'Requested By User',
        Order_Details.TOTAL_AMOUNT AS 'Total Amount'
    FROM 
        Lab_Orders
    INNER JOIN
        Order_Details ON Order_Details.ORDER_ID = Lab_Orders.ORDER_ID 
    INNER JOIN
        Customers ON Customers.CustId = Lab_Orders.CUSTID
    INNER JOIN
        patients ON Patients.Patient_No = Lab_Orders.patient_no
    INNER JOIN
        LabTests ON LabTests.TestId =  Order_Details.TESTID
    WHERE 
        CONVERT(VARCHAR, [Lab_Orders].ORDER_ID) + CONVERT(VARCHAR, [ORDER_DATE]) + CustName + ORDER_DESCRIPTION + TestName + USER_ID + PATIENT_NAME + CONVERT(VARCHAR, AGE) + Invoice_order_no + TOTAL_AMOUNT LIKE '%'+ @Criteria +'%'
        AND Lab_Orders.order_status = 1
    ORDER BY
        [Lab_Orders].ORDER_ID DESC