1 sunshine 10000
3 xyz 30000
2 semon 20000
2. 删除的几种方法:
(1)通过建立临时表来实现
SQL>create table temp_emp as (select distinct * from employee)
1 sunshine 10000
3 xyz 30000
2 semon 20000
2. 删除的几种方法:
(1)通过建立临时表来实现
SQL>create table temp_emp as (select distinct * from employee)