摘要： val emp = Seq((1,"Smith",-1,"2018","10","M",3000), (2,"Rose",1,"2010","20","M",4000), (1,"Williams",1,"2020","10","M",1000), (2,"Jones",2,"2005","10", 阅读全文

摘要： select name, max(value) from out_pumptable group by name # 创建表 CREATE TABLE IF NOT EXISTS `runoob_tbl`( `runoob_id` INT UNSIGNED, `runoob_title` VARCH 阅读全文