瑶啊摇✨

摘要： ``` -- 查询全部内容 SELECT * FROM sc; -- 查询部分列 SELECT zno,sno,sname FROM student; -- 限制条件查询部分列 SELECT zno,sno,sname,ssex FROM student WHERE ssex = '女'; -- 限制查询条数 SELECT zno,sno,sname,ssex FROM student WHERE... 阅读全文