在DELPHI插入记录问题
procedure TForm_course_result.Button1Click(Sender: TObject);
begin

try
ado_temp.Close;
ado_temp.SQL.Clear;
ado_temp.sql.Add( 'delete from student_score ');
ado_temp.Prepared;
ado_temp.ExecSQL;
ado_Temp.Close;
ado_temp.SQL.Clear;
ado_temp.SQL.Add( 'insert into student_score(course_id,student_id,score) select course_id,student_id,0 ' ' from student_selectcourse ');
ado_temp.Prepared;
ado_temp.ExecSQL;
except
application.MessageBox( '数据初始化失败! ', '系统提示 ',0);
exit;
end;
ado_szye.Close;
ado_szye.Open;
end;

end.


我想把表student_selectcourse的所有记录导入表student_score，并且只导入course_id,student_id,score三个字段内容，为什么调试出错，提示是‘FROM student_selectcourse　之前有未闭合的引号’？

[解决办法]
insert into student_score (course_id,student_id,score) select course_id,student_id,0 from student_selectcourse