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using System.Data.SqlClient;
using System.Data.OleDb;
  private void tsmiImportTeacherInfo_Click(object sender, EventArgs e)
        {
            DataSet ds;
            if (ofdImport.ShowDialog()==DialogResult.OK)
            {
                ds = ImportExcel(this.ofdImport.FileName);  //»ñµÃExcel
            }
            else
            {
                return;
            }
            int odr = 0;
            SqlConnection cn = db.sqlconnection();
            try
            {
                cn.Open();
                string str = "insert into Teacher (TeacherId,Pwd,eachCourse,TeacherName) values(@TeacherId,@Pwd,@TeachCourse,@TeacherName)";
                SqlCommand cmd = db.sqlcommand(str,cn);
                int dsLength = ds.Tables[0].Rows.Count;   //»ñµÃExcelÖÐÊý¾Ý³¤¶È 
          &


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create proc pr_select_Natural
(
 @CDATE  datetime,
 @FAC_NAME varchar(50),
 @BATTERY_TYPE varchar(20),
 @MAKE_MODE varchar(20),
 @PRODUCE_MODE varchar(20),
 @YEAR  char(4),
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¡¡¡¡ALTER TABLE distributors ADD COLUMN address varchar(30);
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¡¡¡¡ALTER TABLE distributors DROP COLUMN address RESTRICT;
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¡¡¡¡ALTER TABLE distributors
¡¡¡¡ALTER COLUMN address TYPE varchar(80),
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