Oracle database operations: You can not delete columns in the table belong to the SYS

I. Description of the problem

For security reasons, oracle sys allowed to remove columns in the data table
next offer my solution, if you please help a praise, thank you

Second, the problem is solved

Create a user and give yourself permission before proceeding

1, SQL P lus Login

Input: sys as sysdbaand password

2, create a table space

(1) Complex

create tablespace tablespace_name
datafile ‘路径’ size 大小
[autoextend on next 大小]
[maxsize 大小]

autoextend: Table space from growth
maxsize: the maximum table space
(2) simple

 create tablespace tablespace_name datafile 'C:\app\Administrator\oradata\orcl\***.DBF' size 3000m; 

3. Create user

 create user 用户名 identified by 密码 default tablespace 表空间;

4, for the authorized users

Reference information about the delegation of authority as follows connection
https://www.cnblogs.com/buxingzhelyd/p/7865194.html (thanks to the author, invasion deleted)

grant dba,connect to 用户名;

5, new user connection

 con qiuhua;

change the password

passw

6, connect to the database with newly created users

7, the effect

After the connection in their own user model created, you can perform various operations