Question

这是我的Mysql代码，它给了一个语法错误意外的Declare_sym

Dim SQL As String = "SELECT AES_DECRYPT(`AG_Nom`, '" & MyPass & "') AS @UserName, AES_DECRYPT(`AG_Pic`, '" & MyPass & "') AS @UserPic FROM `Agents`"
Dim command = New MySqlCommand(SQL, MySQLConn)
MySQLConn.Open()

command.Parameters.AddWithValue("@MyPass", MyPass)

Dim Reader As MySqlDataReader = command.ExecuteReader()
While Reader.Read
    DataGridView1.Rows.Add(Reader.GetString("UserName"), Reader.GetString("UserPic"))
End While

MySQLConn.Close()
MySQLConn.Dispose()

请帮忙语法错误意外的Declare_sym

Answer 1

我发布的查询中没有Declare_sym，但您的SQL代码确实存在语法错误，如下所示。在发布问题时不确定这些是否只是拼写错误

 select Count(*) into regno_Count
 fro students_info 
  ^...... should be *from*

   update students_info
   set firstname = in_fNM,
   middlename = in_mNM,
   lastname = in_lNM,   <----- remove this extra *,* here
   where regno = in_regno ;

将您的程序正文更改为如下所示

  delimiter @ 
  create procedure StudentUpsert
  (in in_regno int ,
  in in_fNM varchar(50),
  in in_mNM varchar(50),
  in in_lNM varchar(50))
  begin 

  declare  regno_Count int ; 
  select Count(*) into regno_Count
  from students_info;

  if regno_Count > 0 then
   update students_info
   set firstname = in_fNM,
   middlename = in_mNM,
   lastname = in_lNM
   where regno = in_regno ;
   else
   insert into students_info
   values (in_regno , in_fNM , in_mNM , in_lNM);
   end if;
   end@

语法错误，意外的Declare_sym

1 个答案: