问题
I'm building a small proof-of-concept app that requires historical stock quotes. The UI in my app allows users to select a date range, and I've been using the YQL console to generate the REST calls to request the historical quote data. YQL calls like this:
select * from yahoo.finance.historicaldata where symbol = "JNJ" and startDate = "2015-01-01" and endDate = "2015-12-11"
work fine, but if I go too far back into time like this:
select * from yahoo.finance.historicaldata where symbol = "JNJ" and startDate = "2013-01-01" and endDate = "2015-12-11"
I get no quotes back and find a warning in the XML that looks like this:
<warning>Too many instructions executed: 50223882</warning>
How far back in time can we query before running into the limit?
回答1:
It appears that the limit for at least a single ticker quote is 364 records. I found this out by doing several YQL queries and finding that this query works:
select * from yahoo.finance.historicaldata where symbol = "JNJ" and startDate = "2014-07-03" and endDate = "2015-12-11"
and this one doesn't:
select * from yahoo.finance.historicaldata where symbol = "JNJ" and startDate = "2014-07-02" and endDate = "2015-12-11"
When I parse the XML coming back from the first query, I find 364 records.
来源：https://stackoverflow.com/questions/34233174/how-far-back-in-time-can-i-query-historical-quotes-from-yahoo-finance-yql