数据能力咨询：上证主板历史覆盖、历史版本和退市权益数据

您好,我做个人非商业的沪深主板日频研究,目前,目前:

1. ++:`库存-基本-++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

2. 历史版本与当时可见性:'日、-日ly-基本、-adj-factor sst-st、-namechang-dividend`能否取得每条记录首次发布时间-?入库时间、历史修订记录-?如果只能返回当前修订后的历史-?如有对应接口-?如有对应接口-?如有对应接口-?.

? ? ????????????????????????????????????????

+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++。