CREATE PROCEDURE [BO_Currencies]
@Currency nvarchar(255) = NULL
AS

	SELECT Symbol Code, Symbol CurrencyName, SymbolDescription  LongName,
	Decimals from [Symbols]  where isnull(@Currency, '') = '' or SymbolDescription like '%' + @Currency + '%'
	UNION ALL
	SELECT t.Base Code, t.Base CurrencyName, t.Base  LongName, 8 Decimals 
	from [Tickers] t left join [Symbols] s on s.Symbol=t.Base where s.Symbol is null and (isnull(@Currency, '') = '' or t.Base like '%' + @Currency + '%') Group by t.Base
	UNION ALL
	SELECT t.NonBase Code, t.NonBase CurrencyName, t.NonBase  LongName, 8 Decimals 
	from [Tickers] t left join [Symbols] s on s.Symbol=t.NonBase 
	left join [Tickers] b on b.Base = t.NonBase where s.Symbol is null and b.Base is null 
	and (isnull(@Currency, '') = '' or t.NonBase like '%' + @Currency + '%') Group by t.NonBase
RETURN 0