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C# code:
string sql = "update wc_subject set sub_amount=sub_amount+1, sub_date=? where sub_id=?";

OleDbCommand command = new OleDbCommand(sql, connection);
command.Parameters.Add("?", OleDbType.Date).Value = userName;
command.Parameters.Add("?", OleDbType.Integer).Value = 1;


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C# codestring sql="update wc_subject set sub_amount=sub_amount+1, sub_date=? where sub_id=?";

OleDbCommand command=new OleDbCommand(sql, connection);
command.Parameters.Add("?", OleDbType.Dat


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PHP code:

Example:
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