关于SQL数据库表

begin
ls_query:='select pwd from basic_user where userid=:user_id';
query1.Close;
query1.SQL.Clear;
query1.SQL.Append(ls_query);
query1.Parameters.Items[0].Value:=logonform.operator;
try
query1.Open;
except
showmessage('bitbtn1click database Error!');
exit;
end;

哪我应该到哪里去找basic_user 这张表呢？、？？急！！！
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