结构化查询语言（SQL）的出现，极大地促进了（ ）的应用。
- A.层次数据库
- B.网络数据库
- C.关系数据库
- D.文件管理系统
正确答案及解析
正确答案
解析
SQL是一门ANSI的标准计算机语言，用来访问和操作数据库系统。SQL可与数据库程序协同工作，而关系型数据库管理系统使用的就是SQL语言进行数据的操作。
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