MySQL 检索数据总结
摘要:
1. 基本查询 检索单个列select prod_name from products; 检索所有列select * from products; 检索不同的行select distinct vend_id from products; 限制结果select prod_name from produ 阅读全文
posted @ 2020-04-22 14:55 头大的冯冯 阅读(200) 评论(0) 推荐(0) 编辑