sqlce基本語法

整理和總結一下SQLCE的用法
引用  System.Data.SqlServerCe
（1）數據庫文件的創建
     SqlCeEngine eng = new SqlCeEngine("DataSource = " + 
         FileName);
     eng.CreateDatabase();
（2）初始化連接
    m_SqlCeConn = new SqlCeConnection("DataSource =" + m_LocalDbFile);
    m_SqlCeConn.Open();//關閉連接： m_SqlCeConn.Close();
（3）表是否存在的判斷
"select table_name from information_schema.tables where table_name = "T_Test "
（4）創建表
@"
                        CREATE TABLE T_Test (PId int identity(1,1),
                          PCode int, F int, P ntext,
                          D datetime)"


（5）查詢
     SqlCeDataAdapter adpt = 
        new SqlCeDataAdapter(sql, m_SqlCeConn);
     adpt.Fill(dsResult);


（6）執行
    SqlCeCommand cmd = new SqlCeCommand(sql, m_SqlCeConn);
    int effectRowNum = cmd.ExecuteNonQuery();
    if (effectRowNum  != 0)
        //成功
        
（7）SQLCE只支持簡單的SQL語法