openGauss每日一练第5天 |openGauss中一个用户可以访问多个库

学习目标

学习openGauss体系结构，使用一个用户访问多个数据库。

课程学习

数据库用户user1可以访问不同的数据库

课程作业

1.创建数据库musicdb10，创建用户user10，赋予sysadmin权限

root@modb:~# su - omm
omm@modb:~$ gsql -r
gsql ((openGauss 3.0.0 build 02c14696) compiled at 2022-04-01 18:12:00 commit 0 last mr  )
Non-SSL connection (SSL connection is recommended when requiring high-security)
Type "help" for help.

omm=# CREATE DATABASE musicdb10 ;
CREATE DATABASE
omm=# CREATE USER user10  IDENTIFIED BY 'kunpeng@1234';
NOTICE:  The encrypted password contains MD5 ciphertext, which is not secure.
CREATE ROLE
omm=# ALTER USER user10 sysadmin;
ALTER ROLE

2.用户user10访问数据库postgres，创建一个表并插入数据

omm=# \c postgres user10
Password for user user10: 
Non-SSL connection (SSL connection is recommended when requiring high-security)
You are now connected to database "postgres" as user "user10".
openGauss=> create table tb_test1(col1 char(1),col2 char(2),col3 char(3));
CREATE TABLE
openGauss=> insert into  tb_test1 values('a','b','c');
INSERT 0 1

3.用户user10访问数据库omm，创建一个表并插入数据

openGauss=> \c omm user10
Password for user user10: 
Non-SSL connection (SSL connection is recommended when requiring high-security)
You are now connected to database "omm" as user "user10".
omm=> create table tb_test2(col1 char(1),col2 char(2),col3 char(3));
CREATE TABLE
omm=> insert into  tb_test2 values('a','b','c');
INSERT 0 1

4.用户user10访问数据库musicdb10，创建一个表并插入数据t31，验证了这个结论

omm=> \c musicdb10 user10
Password for user user10: 
Non-SSL connection (SSL connection is recommended when requiring high-security)
You are now connected to database "musicdb10" as user "user10".
musicdb10 => create table tb_test3(col1 char(1),col2 char(2),col3 char(3));
CREATE TABLE
musicdb10 => insert into  tb_test3 values('a','b','c');
INSERT 0 1