SOQL IN String Literals
Snap: Salesforce SOQL If I hard code it, it works. SELECT ConversionRate, CreatedById, CreatedDate, Id, IsoCode, LastModifiedById, LastModifiedDate, NextStartDate, StartDate, SystemModstamp FROM ...
Forum Discussion
You can try with enabling the expression evaluation, and with the following expression:
"SELECT ConversionRate, CreatedById, CreatedDate, Id, IsoCode, LastModifiedById, LastModifiedDate, NextStartDate, StartDate, SystemModstamp FROM DatedConversionRate
where IsoCode in("+$currencyCodes+")"
