In a structurally-oriented language course,__________. A: language behaviour is conceived of as a matter of projecting knowledge B: language is brought in to fit the schemata C: language is never taught in association with situations D: the focus is on the schemata

【单选题】针对MYSQL数据库进行注入,常用的命令解释正确的是 A. 可以通过SCHEMATA表查询表信息 B. 可以通过TABLES表查询列信息 C. 可以通过COLUMNS表查询具体数据 D. 可以通过TABLES表中的Table_name查询数据库名