Question

嗨，我正在处理此查询，以将现有记录添加到同一数据库中，但指定了不同的数据。这是查询

Public Sub autoEnroll_by_Semester()
    'this is the connection string which is
    'in the enrollment_conn variable Data Source=192.168.254.108,1433;Network Library=DBMSSOCN;Initial Catalog = GEARS;User ID =user123;Password = user123"

    Try
        If MsgBox("Do you want to proceed with auto enrolling the records?" & Chr(13) & Chr(10) & "Please double check before proceeding!", vbInformation + MsgBoxStyle.YesNo) = MsgBoxResult.Yes Then
            enrollment_conn.Open()
            command = New SqlCommand("INSERT INTO dbo.Enrollees(RegistrationID,Track,Strand,Specialization_TVL,Grade,Section,Semester,School_Year,Transferee,Transferee_School,Transferee_Address,Transferred,Transfer_Type,Establishment_School,Date_Of_Transfer,Dropped,Date_Dropped,Regular,Gen_Average,Enrolled,Date_Enrolled) " & _
                                     "SELECT RegistrationID,Track,Strand,Specialization_TVL,Grade,Section,'" & Auto_Enroll_Semester.Specify_Cbx_semester.Text & "',School_Year,Transferee,Transferee_School,Transferee_Address,Transferred,Transfer_Type,Establishment_School,Date_Of_Transfer,Dropped,Date_Dropped,Regular,Gen_Average,Enrolled,'" & Auto_Enroll_Semester.Specify_Date_enrolled.Text & "'" & _
                                     " FROM dbo.Enrollees " & _
                                     "WHERE Enrolled='Yes' AND Semester='" & Auto_Enroll_Semester.Select_Cbx_semester.Text & "' AND School_Year='" & Auto_Enroll_Semester.Select_Cbx_schoolyear.Text & "' AND Section='Einstein'", enrollment_conn)
            command.ExecuteNonQuery()
            MsgBox("New records have been inserted.. Please check enrollees list", vbInformation)
        End If
    Catch ex As Exception
        MsgBox(ex.Message, vbExclamation)
    Finally
        command.Parameters.Clear()
        enrollment_conn.Close()
    End Try
End Sub

执行查询后，它执行但没有新记录。.我的问题是，当您使用控件作为值的基础时，我该如何执行该工作或不插入记录？还有其他可能的方法吗？谢谢

这是trace.writeline的结果：插入dbo.Enrollees（RegistrationID，Track，Strand，Specialization_TVL，Grade，Section，Semester，School_Year，Transferee，Transferee_School，Transferee_Address，Transferred，Transfer_Type，Establishmentment_School，Date_Of_Transfer，Droped，Date_rolled，Date_rolled，Date_rolled，Date_rolled，Date_rolled，Date_roll ，跟踪，子线，专业化_TVL，成绩，部分，'12'，学年，受让者，受让者学校，受让者地址，已转移，受让类型，建立学校，日期_转移，已删除，日期已删除，常规，平均_平均，已注册'10 / 30 .Enrollees WHERE Enrolled ='Yes'AND Semester = '11'AND School_Year ='2018-2019'AND Section ='Einstein';

Answer 1

它现在正在工作...问题是一个逻辑错误。.学期中where的值无效，并可能导致select语句无法选择记录。.谢谢大家的帮助。现在关闭了。

Answer 2

问题出在您的SQL语句上。第一个是有问题的-没什么意义。您说的是：“我希望您放入一个新记录，并为这些字段提供值”，但是实际上您并没有提供这些值。

即

INSERT INTO dbo.Enrollees(...)

应写为：

INSERT INTO dbo.Enrollees(...) VALUES (...);

换句话说，对于您的insert语句来说，它实际上意味着某些内容，您必须提供记录对所有这些字段的实际值。

对于您的查询，SQL的第二部分看起来不错。只需将值添加到上面的INSERT INTO语句中即可。记住也要添加分号。

INSERT INTO SELECT执行查询，但未将数据插入数据库

2 个答案: