CREATE FUNCTION [C6Mart].[getDataPerfUpdate] ( @rete varchar(1), @cod_fiscale varchar(20) ) RETURNS datetime AS BEGIN declare @dtPerf datetime select top 1 @dtPerf = TRCOM_DTPERF from [CONSUNI].ConsulenzaUnicaFL.[dbo].CBS_HistDatiIngresso where trcom_rete = @rete and trcom_codfisc = @cod_fiscale and trcom_causale = 'UD6' order by data_inserimento_riga desc return @dtPerf END