perl数据库添加、删除、更新、查询操作例子

admin Perl

2023-12-08 0 515

注意：连接时候使用SID指定的database，所以没有在连接中指定database.

#!/usr/bin/perl
use strict;
use warnings;
use DBI;
my $db_name=\”geneva_admin\”;
my $db_passwd=\”geneva_admin\”;

my $dbh=DBI->connect(\”dbi:Oracle:\”,\”$db_name\”,\”$db_passwd\”)
or die \”Can\’t connect to oracle database:$DBI::errstr\\n\”;

my $sth=$dbh->prepare(\”select a,b
from a_tmp
where a=2\”)
or die \”Can\’t prepare SQl prepare:$DBI::errstr\\n\”;
$sth->execute or die \”Can\’t execute:$DBI::errstr\\n\”;
while (my @row = $sth->fetchrow_array()){
my ($a,$b) = @row;
print \”1..\\$a=$a,\\$b=$b\\n\”;
}
$sth->finish();
my $row=3;
my $sql=\”select a,b
from a_tmp
where a = ?\”;
$sth=$dbh->prepare($sql) or die \”Can\’t prepare SQl prepare:$DBI::errstr\\n\”;
$sth->execute($row) or die \”Can\’t execute:$DBI::errstr\\n\”;
while (my @row = $sth->fetchrow_array()){
my ($a,$b) = @row;
print \”2..\\$a=$a,\\$b=$b\\n\”;
}
$sth->finish();
my $row_a=3;
my $row_c=0;
$sql=\”select a,b
from a_tmp
where a = ?
and c = ?\”;
$sth=$dbh->prepare($sql) or die \”Can\’t prepare SQl prepare:$DBI::errstr\\n\”;
$sth->execute($row_a,$row_c) or die \”Can\’t execute:$DBI::errstr\\n\”;
while (my @row = $sth->fetchrow_array()){
my ($a,$b) = @row;
print \”3..\\$a=$a,\\$b=$b\\n\”;
}
$sth->finish();
for $row(1,2,3){
$sql=\”select a,b
from a_tmp
where a = ?\”;
$sth=$dbh->prepare($sql) or die \”Can\’t prepare SQl prepare:$DBI::errstr\\n\”;
$sth->execute($row) or die \”Can\’t execute:$DBI::errstr\\n\”;
while (my @row = $sth->fetchrow_array()){
my ($a,$b) = @row;
print \”4..\\$a=$a,\\$b=$b\\n\”;
}
}
$sth->finish();
#for $row(1,2,3){
#$sql=\”insert into a_tmp
# values (?,?,?)\”;
#$sth=$dbh->prepare($sql) or die \”Can\’t prepare SQl prepare:$DBI::errstr\\n\”;
#$sth->execute($row,$row+1,$row+2) or die \”Can\’t execute:$DBI::errstr\\n\”;
#}
##$dbh->commit;
#$sth->finish();

#$sql=\”insert into a_tmp
# values (100,30,2)\”;
#$sth=$dbh->prepare($sql) or die \”Can\’t prepare SQl prepare:$DBI::errstr\\n\”;
#$sth->execute or die \”Can\’t execute:$DBI::errstr\\n\”;
##$dbh->commit;
#$sth->finish();
for $row(1,2,3){
$sql=\”update a_tmp
set b = ?
, c = ?
where a = ?\”;
$sth=$dbh->prepare($sql) or die \”Can\’t prepare SQl prepare:$DBI::errstr\\n\”;
$sth->execute($row+100,$row+50,$row) or die \”Can\’t execute:$DBI::errstr\\n\”;
}
#$dbh->commit;
$sth->finish();

for $row(1,2,3){
$sql=\”delete from a_tmp
where c=2\”;
$sth=$dbh->prepare($sql) or die \”Can\’t prepare SQl prepare:$DBI::errstr\\n\”;
$sth->execute or die \”Can\’t execute:$DBI::errstr\\n\”;
}
#$dbh->commit;
$sth->finish();

$dbh->do(\”insert into a_tmp values (1,1,1)\”) or die \”$DBI::errstr\\n\”;
$dbh->do(\”delete from a_tmp where c=51\”) or die \”$DBI::errstr\\n\”;
#$dbh->commit;
$sth->finish();
$dbh->disconnect;

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