TADOQuery??
TADOQuery *query = new TADOQuery(this);
query->Connection = ADOConn;
query->SQL->Add("alter table Payment add column char(1) default 'N'");
try {
query->ExecSQL();
}catch(...) {
ShowMessage("数据库操作失败!");
delete query;
Abort();
}
delete query;
这个哪出错了?、