May 17, 2026, 11:40 PM

inbox/DataBase/PostgreSQL/user_managemet/user.sql

@@ -0,0 +1,83 @@
+CREATE USER:
+
+dbaclass=# create user TEST_DBACLASS with password 'test123';
+CREATE ROLE
+
+CREATE USER WITH VALID UNTIL:
+
+dbaclass=# create user TEST_dbuser1 with password 'test123' valid until '2020-08-08';
+CREATE ROLE
+
+CREATE USER WITH SUPER USER PRIVILEGE
+
+dbaclass=# create user test_dbuser3 with password 'test123' CREATEDB SUPERUSER;
+
+CREATE ROLE
+
+VIEW USERS:
+
+dbaclass=# select usename,valuntil,usecreatedb from pg_shadow;
+
+dbaclass=# select usename,usesuper,valuntil from pg_user;
+
+dbaclass=# \du+
+
+DROP USER:
+
+drop user DB_user1;
+
+
+-- providing superuser role will make an user superuser.
+
+postgres=# select usename,usesuper from pg_user where usename='dbatest';
+usename  | usesuper
+---------+----------
+dbatest  | f
+(1 row)
+
+postgres=#
+postgres=# alter user dbatest with superuser;
+ALTER ROLE
+postgres=# select usename,usesuper from pg_user where usename='dbatest';
+usename  | usesuper
+---------+----------
+dbatest  | t
+
+-- How to revoke superuser:
+
+postgres=# alter user dbatest with nosuperuser;
+ALTER ROLE
+postgres=#
+postgres=# select usename,usesuper from pg_user where usename='dbatest';
+usename  | usesuper
+---------+----------
+dbatest  | f
+(1 row)
+
+
+-- providing superuser role will make an user superuser.
+
+postgres=# select usename,usesuper from pg_user where usename='dbatest';
+usename  | usesuper
+---------+----------
+dbatest  | f
+(1 row)
+
+postgres=#
+postgres=# alter user dbatest with superuser;
+ALTER ROLE
+postgres=# select usename,usesuper from pg_user where usename='dbatest';
+usename  | usesuper
+---------+----------
+dbatest  | t
+
+-- How to revoke superuser:
+
+postgres=# alter user dbatest with nosuperuser;
+ALTER ROLE
+postgres=#
+postgres=# select usename,usesuper from pg_user where usename='dbatest';
+usename  | usesuper
+---------+----------
+dbatest  | f
+(1 row)