oracle - wrong query output when using where and having in the same SQL statement - 


select currency.currencyname, currency.currencysymbol, countryname.currencycode,         currency.exchangerate currency,countryname currency.currencycode=countryname.currencycode having currency.exchangerate >= max(currency.exchangerate) group currency.currencyname, currency.currencysymbol,           countryname.currencycode, currency.exchangerate;

this output getting , know wrong because trying display maximum exchange rate . resolve query appreciate. oracle sql developer

currencyname         currencysymbol       currencycode exchangerate -------------------- -------------------- ------------ ------------ british pound        £                    gbp                     1, dollar            $                    usd                1.9626 , danish krone         kr                   dkk                9.9918 , malaysian ringgit    rm                   myr               6.35392 , euro                 €                    eur               1.34076 , indian rupee         rs                   inr               77.3265 , japanese yen         ¥                    jpy               209.881,

try following

select currency.currencyname, currency.currencysymbol,         countryname.currencycode, max(currency.exchangerate) exchangerate currency inner join countryname on countryname.currencycode = currency.currencycode group currency.currencyname, currency.currencysymbol, countryname.currencycode;

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