使用createuser来创建用户

[postgres@web1 ~]$ /data/pgsql/bin/createuser --help
createuser creates a new Postgresql role.

Usage:
  createuser [OPTION]... [ROLENAME]

Options:
  -c,--connection-limit=N  connection limit for role (default: no limit)
  -d,--createdb            role can create new databases
  -D,--no-createdb         role cannot create databases (default)
  -e,--echo                show the commands being sent to the server
  -E,--encrypted           encrypt stored password
  -i,--inherit             role inherits privileges of roles it is a
                            member of (default)
  -I,--no-inherit          role does not inherit privileges
  -l,--login               role can login (default)
  -L,--no-login            role cannot login
  -N,--unencrypted         do not encrypt stored password
  -P,--pwprompt            assign a password to new role
  -r,--createrole          role can create new roles
  -R,--no-createrole       role cannot create roles (default)
  -s,--superuser           role will be superuser
  -S,--no-superuser        role will not be superuser (default)
  -V,--version             output version information,then exit
  --interactive             prompt for missing role name and attributes rather
                            than using defaults
  --replication             role can initiate replication
  --no-replication          role cannot initiate replication
  -?,--help                show this help,then exit

Connection options:
  -h,--host=HOSTNAME       database server host or socket directory
  -p,--port=PORT           database server port
  -U,--username=USERNAME   user name to connect as (not the one to create)
  -w,--no-password         never prompt for password
  -W,--password            force password prompt

Report bugs to <pgsql-bugs@postgresql.org>.
[postgres@web1 ~]$ 
[postgres@web1 ~]$ 
[postgres@web1 ~]$ /data/pgsql/bin/createuser zhongwc -P
Enter password for new role: 
Enter it again: 
[postgres@web1 ~]$ 

[postgres@web1 ~]$ /data/pgsql/bin/createdb --help
createdb creates a Postgresql database.

Usage:
  createdb [OPTION]... [DBNAME] [DESCRIPTION]

Options:
  -D,--tablespace=TABLESPACE  default tablespace for the database
  -e,--echo                   show the commands being sent to the server
  -E,--encoding=ENCODING      encoding for the database
  -l,--locale=LOCALE          locale settings for the database
      --lc-collate=LOCALE      LC_COLLATE setting for the database
      --lc-ctype=LOCALE        LC_CTYPE setting for the database
  -O,--owner=OWNER            database user to own the new database
  -T,--template=TEMPLATE      template database to copy
  -V,--version                output version information,then exit
  -?,--help                   show this help,--host=HOSTNAME          database server host or socket directory
  -p,--port=PORT              database server port
  -U,--username=USERNAME      user name to connect as
  -w,--no-password            never prompt for password
  -W,--password               force password prompt
  --maintenance-db=DBNAME      alternate maintenance database

By default,a database with the same name as the current user is created.

Report bugs to <pgsql-bugs@postgresql.org>.
[postgres@web1 ~]$ 
[postgres@web1 ~]$ 
[postgres@web1 ~]$ /data/pgsql/bin/createdb zwcdb

[postgres@web1 ~]$ psql -U zhongwc -d zwcdb
psql (9.2.2)
Type "help" for help.

zwcdb=> help
You are using psql,the command-line interface to Postgresql.
Type:  \copyright for distribution terms
       \h for help with sql commands
       \? for help with psql commands
       \g or terminate with semicolon to execute query
       \q to quit
zwcdb=> 

[postgres@web1 data]$ psql -U zhongwc -d zwcdb -h 192.168.1.203 -p 1521
Password for user zhongwc: 
psql (9.2.2)
Type "help" for help.

zwcdb=> create table t_zhongwc(pid integer,pname varchar(32),constraint zhongwc_pid_pk primary key(pid));
NOTICE:  CREATE TABLE / PRIMARY KEY will create implicit index "zhongwc_pid_pk" for table "t_zhongwc"
CREATE TABLE
zwcdb=> 
zwcdb=> select * from t_zhongwc;
 pid | pname 
-----+-------
(0 rows)

zwcdb=> drop table t_zhongwc;
DROP TABLE
zwcdb=> drop table t_zhongwc;
ERROR:  table "t_zhongwc" does not exist