类似于 :
exch product templateID = exec ExchangeID,ProductID,TimeTemplateID from Instruments where InstrumentID=`IF2201
如何用一个语句中 得到？ 目前我只能按照如下实现
exch= select ExchangeID from Instruments where upper(InstrumentID)==`IF2201
product = select ProductID from Instruments where upper(InstrumentID)==`IF2201
template = select TimeTemplateID from Instruments where upper(InstrumentID)=`IF2201
请问是否有简洁一点的写法
v = exec exch, product, templateID from t where templateID = "IBM"exch, product, templateID = v[0], v[1], v[2]
