我正在尝试从MySQL数据库中获取信息，然后我将在perl中对其进行操作:usestrict;useDBI;my$dbh_m=DBI->connect("dbi:mysql:Populationdb","root","LisaUni")ordie("Error:$DBI::errstr");my$Genotype='Genotype'.1;#TheideahereiseventuallyIwillaskthedatabasehowmanyGenotypesthereare,andthenloopitroundtocompletethefollowingforeachGenotype:m

我有一些看起来像这样的东西:my$report=newReportGenerator;#customobjectmy$dbh=$dbc->prepare('SELECT*FROMsome_tableWHEREsome_condition');#DBIhandle$dbh->execute();while(my$href=$dbh->fetchrow_hashref){$report->process_record($href);}$dbh->finish();print$report->printReport();我的问题是循环的每次迭代都非常慢。问题是MySQL。我想知道是否有可能在

考虑下表:mysql>select*fromvCountryStatus;+-------------+------------+------+---------+--------+-----------------+|CountryName|CountryISO|Code|Status|Symbol|CurrencyName|+-------------+------------+------+---------+--------+-----------------+|Brazil|BR|55|LIVE|BRL|BrazilianReal||France|FR|33|offline|