摘要: 求中位数档次 drop table if exists class_grade; CREATE TABLE class_grade ( grade varchar(32) NOT NULL, number int(4) NOT NULL ); INSERT INTO class_grade VALU 阅读全文
posted @ 2021-10-12 17:26 临渊不羡渔 阅读(47) 评论(0) 推荐(0) 编辑