use strict;
use warnings;

my $stmt0 = "SELECT table.field0, table.field1\nFROM table0;\n";
my $stmt1 = "SELECT table.field0, table.field1\nFROM table1\nWHERE field0 = 'foo';\n";

my $nameA = $1 if $stmt0 =~ m/^FROM\s+(\S+)$/ms;
my $nameB = $1 if $stmt1 =~ m/^FROM\s+(\S+)$/ms;

my $name0 = do { $stmt0 =~ m/^FROM\s+(\w+)(;*?)$/ms; $1 };
my $name1 = do { $stmt1 =~ m/^FROM\s+(\w+)(;*?)$/ms; $1 };

print "table name A ='$nameA'\n";
print "table name B ='$nameB'\n";
print "table name 0 ='$name0'\n";
print "table name 1 ='$name1'\n";

##</code><code>##

table name A ='table0;'
table name B ='table1'
table name 0 ='table0'
table name 1 ='table1'