Try:

my $sth3 = $dbh->do("UPDATE league SET played = '$playeda', won = '$wo
+na', fr = '$fota', ag = '$againsta', points = '$pointsa', year= '$thi
+syear', sport= '$sport', group = '$group'")
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all the  AND's are not nesessary. And you don't need to add a \ before your '.

Hope this will work & help.

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