How to non-intrusive database routing by key? Here's "no intrusion" involves two difficulties: 1. How can I not pass the appkey when the web is tuned to the service but bring the appkey to the service? 2. Assuming the first point is ok, how can the service side execute sql on the specified library without displaying the changed data source?
What is time series data? The simplest definition is the data in the data format that contains the timestamp field. For example, the price of the stock market, the temperature in the environment, the CPU usage of the host, and so on. But what data does not contain timestamp? Almost all data can be tagged with a timestamp field. One of the more important attributes of time series data is how to query it. At the time of the query, we always bring a time range to filter the data for the time series. At the same time, the result of the query will always include the timestamp field.