Compared to commercial databases, network raw digital information resources are much richer in content.
相比于商业数据库，网络原生数字资源的内容要丰富得多。
At present, many commercial databases have showed various degrees of realizing the function of query optimization.
目前的众多的商用数据库都不同程度的实现了查询优化功能。
At present, many commercial databases have showed various degrees of realizing the function of query optimization.
目前的众多的商用数据库都不同程度的实现了查询优化功能。
应用推荐