摘要: 1.查询去重 SELECT DISTINCT department_id FROM employees; 2.排序 SELECT column1, column2, ... FROM table ORDER BY column1 [ASC | DESC]; SELECT column1, colum 阅读全文
posted @ 2023-11-15 22:43 手可摘星辰。 阅读(10) 评论(0) 推荐(0) 编辑