impala: 查询impala表时一定要加库名使用级联删除带有表的数据库:DROP database name cascade; insert插入的两种方式: 1. insert into employee (ID,NAME,AGE,ADDRESS,SALARY)VALUES (1, 'Ramesh', 32, 'Ahmedabad', 20000 ); 2.不指定列值,注意顺序 insert into employee values (2, 'Khilan', 25,'Delhi', 150…