The Cache database is still relatively unfamiliar to most domestic IT staff. However, in the medical field of foreign countries, in the HIS system in the United States and Europe, the proportion of Cache database is the best database. . The following is the characteristics of the database: 1, fast. The Cache database queries the same data in the same condition than the ordinary database such as Oracle is fast. The reason is that the Cache database is called post-translation, as the name suggests, cache is based on normal relational databases such as: Oracle, SQL Server, Sybase, etc., and have improved. 2, use simple. The Cache database supports standard SQL statements, so users who are less familiar with M languages can still be easily operated in the database. 3, the interface is easy. The Cache database supports the ODBC standard interface, so it is very easy to exchange data exchange with other systems. At the same time, Cache can also output data into a text file format for other system access calls. 4, the real 3-layer structure. The Cache database can truly implement a three-layer structure to realize a real distributed service. Upgrade and expansion is convenient. Because of the above-described distributed 3 layer structure, when the hospital needs to increase the client PC or the hospital for expanding the scale, it is not necessary to re-purchase or update the primary server, just increase the number of secondary servers, the secondary server is relatively It is much more cheap than the main server, so the hospital can save funds to reduce duplicate investment. 5, object editing. The Cache database is a real object-type database. When the user can define the object you want directly with the database, then call the method and attributes of the object in other development tools to complete the development work, which is very convenient. Support for remote mapping and mirroring. The Cache database supports remote mapping and mirroring, such as between different cities, or between different regions of the same cities, cache can mirror, allowing the Cache database in different regions to connect synchronously, although in different regions, Everyone uses to share a database. Support 6, holding Web development. The Cache database provides self-contained web development tools, which is very convenient to use, in line with the trend of current software development. 7, the price is cheap. The price of the Cache database is much cheaper than Oracle. Can be downloaded by http://www.intersys.com.