For colleagues who need to send articles, apply for topics, and write bids, retrieving literature is really a very basic and important content, and it cannot be overemphasized. Searching is one of the essential skills, such as keeping track of research hotspots in the field of nursing, subscribing to new articles in your own direction and new articles from industry leaders. Another example is to do their own topics, some peers want to publish a review, such as doing meta-analysis, you have to rely on the search results to determine the topic, and you need to formulate a more detailed search strategy after determining the topic, what search terms are used, what databases, these are all listed in the text (figure below). In order to get valuable results, it is necessary to search as accurately as possible, so it is important to have a clear search idea. 
bayhakki, &hatthakit, u. (2012). lived experiences of patients on hemodialysis: a meta synthesis. nephrology nursing journal, 39(4), 295-304.Take my own experience as an example, I didn't get in touch at the beginning, the problem was too basic, and I was embarrassed to ask the tutor and sister directly, so I went to check all kinds of information, learn Xi, and consulted the teachers in the school library, some really didn't understand, and even did not hesitate to pay for Xi and Xi, coupled with my own continuous practice and exploration, I finally became the enthusiastic sister who guided the junior sister in the research group, the retrieval master in the eyes of the boss, and the research hotspot detector in the eyes of colleagues. Without further ado, today's article is focused on the differences between databases. Knowing this, you have mastered the basics of developing a search strategy. Knowing that everyone is very busy with work and Xi, to put it simply, I present the core knowledge I have learned over the years in the form of **, you can save it by yourself, and often see it often. If you need to know more, leave a message in the background to get more knowledge of supplementary details. Commonly used databases.
There are many types of databases, which can be divided into abstract databases (pubmed, embase, web of science, etc.), full-text databases (cnki, vip, Wanfang, elsevier, clinicalkey, ovid, springerlink, wiley, etc.), factual numerical databases (encyclopedias, guides, yearbooks, manuals, Chinese Academy of Sciences JCR journal partition table, etc.), and more** databases (Open Course, Jove, Primal Pictures 3D, etc.), clinical databases (ClinicalKey, BMJ Best Practice, etc.).
This time I shared the three most commonly used databases in our nursing profession, Pubmed, Embase, and Web of Science Core Collection, these three are free to use in addition to pubmed, and the remaining two need to be purchased, and many schools and units generally buy them. Commonly used three major databases for comparison.
Individual summary, for reference only) Retrieval is a dynamic process that requires an assessment of whether the results, quantity and quality of each retrieval meet their objectives, and if not, a re-search should be conducted. The search results are not satisfactory, in fact, the answer is hidden in the search step. If you look through your search history and search details, you may be able to understand why you can't get the results you want.