If you use $dbh->quote() on a string, that puts quote marks around it, so when you put more quotes around it in your SQL you are ruining it. Here are two ways to do it: 
$str = $dbh->quote("%it's not a problem%");
$sth = $dbh->prepare(
   "SELECT * FROM practice WHERE name LIKE $str"
) || die "Error: " . $dbh->errstr;
$sth->execute() || die "Error: " . $sth->errstr;

OR BETTER

$str = "%it's not a problem%";
$sth = $dbh->prepare(
   "SELECT * FROM practice WHERE name LIKE ?"
) || die "Error: " . $dbh->errstr;
$sth->execute($str) || die "Error: " . $sth->errstr;

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Note that I also changed $dbh->errstr to $sth->errstr for your execute, the error is in whatever handle you are using ($dbh for prepare, $sth for execute).

In reply to Re^3: Quoting Strings For SQL LIKE queries by jZed
in thread Quoting Strings For SQL LIKE queries by Cody Pendant

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