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update A as C,A in [ODBC][ODBC;Driver=SQL Server;Server=XX;Uid=XX;Pwd=XX;database=XX]
set
A.CustomerName=C.CustomerName,
A.MobilePhone=C.MobilePhone
where C.ID=A.ID

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CREATE TABLE Product(model integer, 
maker varchar(20), 
CONSTRAINT SAND PRIMARY KEY (model), 
CONSTRAINT PANDA FOREIGN KEY (model) REFERENCES PC (model) 
ON DELETE CASCADE ON UPDATE CASCADE)
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OleDbDataAdapter da = new OleDbDataAdapter("Select * from Grade", objConnection);
DataSet ds = new DataSet();
DataTable myDataTable = ds.Tables["Grade"];
da.Fill(ds,"Grade");

foreach (DataRow myDataRow in myDataTable.Rows)
{ ......
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