刚学习Db2 对一条 select 语句得疑问.

insert into liaohaibing.Employee(ID,Name,Password,Department) select ID,Name,Password,Department from NULLID.Employee;不知道为什么这条句语还能执行成功.

insert into liaohaibing.Employee(ID,Name,Password,Department) select ID,Name,Password,Department from NULLID.Employee;不知道为什么这条句语还能执行成功.