From the product features, performance, maturity, there is no doubt that Oracle is the leader, and therefore bundled with a lot of core key business, which has led to the emergence of a large number of related industries, the industry has a lot of senior experts, there are many many practitioners. When the wind to go o blowing away, let's not talk about the industry, but in this practitioners need to go where? From the current situation, oracle went downhill for the following reasons: Oracle's price policy has been criticized, the domestic localization/security policy guidance such as autonomous and controllable, domestic vendors such as Ali, Huawei and other momentum, foreign investment, especially U.S.-funded products in the current context of the impact of a very large. Technically speaking, distributed database or NoSQL products only in some specific scenarios have a limited competitive advantage, with oracle more than forty years of accumulation can not be compared, this is also to go to O on the road to some of the leaders of the decision-making difficulties. For customers, the adoption of any product to replace Oracle is absolutely not cost-effective. Starting from the Oracle layoffs last year, especially the domestic R & D layoffs of nearly 10,000 people. oracle is now seriously aware of the threat of the cloud, and with it is to go to the O. oracle has not been vigorously push the cloud, because of the conflict with the traditional business of selling license is too great, will inevitably affect the traditional business, the cloud is not possible to sell such expensive license. I do not know will be Will not repeat the mistakes of Kodak and Nokia, Kodak's traditional film, and Nokia, which was subverted by smart phones. Ali started a few years ago to go IOE, in the country caused by the wave of go O, followed by the rise of open source databases, domestic databases, databases on the cloud, coupled with the impact of the trade war (localization), the survival of the domestic Oracle environment as well as very difficult. Of course, the comprehensive view can not be denied that the Oracle database is the strongest database in the universe, but now there are more choices in the segmentation scenario, especially the Internet enterprises to embrace open source, rather than say that Oracle is on the way out, it is better to say that the times have changed. For practitioners, mastering any kind of technology, especially database technology, is somewhat interconnected. Even if you have only been involved in oracle related, but also need to keep learning to recharge, so the little sister and give for the big boys to say, in fact, no need to be afraid, continuous learning is the necessary quality of each IT personnel, pay attention to the little sister, to share more technical ideas.