PostgreSQL 데이터베이스 생성, 삭제 방법
postgres=# SELECT * FROM pg_database;
datname | datdba | encoding | datcollate | datctype | datistemplate | datallowconn | datconnlimit | datlastsysoid | datfrozenxid | dattablespace | datc
onfig | datacl
-----------+--------+----------+-------------+-------------+---------------+--------------+--------------+---------------+--------------+---------------+-----
------+-------------------------------------
template1 | 10 | 6 | zh_CN.UTF-8 | zh_CN.UTF-8 | t | t | -1 | 11563 | 648 | 1663 |
| {=c/postgres,postgres=CTc/postgres}
template0 | 10 | 6 | zh_CN.UTF-8 | zh_CN.UTF-8 | t | f | -1 | 11563 | 648 | 1663 |
| {=c/postgres,postgres=CTc/postgres}
postgres | 10 | 6 | zh_CN.UTF-8 | zh_CN.UTF-8 | f | t | -1 | 11563 | 648 | 1663 |
|
(3 rows)
postgres=# \l
List of databases
Name | Owner | Encoding | Collation | Ctype | Access privileges
-----------+----------+----------+-------------+-------------+-----------------------
postgres | postgres | UTF8 | zh_CN.UTF-8 | zh_CN.UTF-8 |
template0 | postgres | UTF8 | zh_CN.UTF-8 | zh_CN.UTF-8 | =c/postgres
: postgres=CTc/postgres
template1 | postgres | UTF8 | zh_CN.UTF-8 | zh_CN.UTF-8 | =c/postgres
: postgres=CTc/postgres
(3 rows)
postgres=#이 세 개의 데이터베이스는 모두 initdb에서 생성된 것이다. 그 중에서template0과template1은 데이터베이스 템플릿으로 만들 때 새로운 데이터베이스를 복제할 수 있다.
2. 만드는 방법, 어떤 사용자가 만드는지, 기본 데이터베이스 owner는 이 사용자입니다.
[postgres@kevin ~]$ psql postgres
psql (8.4.2)
Type "help" for help.
postgres=# CREATE DATABASE pg_databse_test_1;
CREATE DATABASE
postgres=# \l
List of databases
Name | Owner | Encoding | Collation | Ctype | Access privileges
-------------------+----------+----------+-------------+-------------+-----------------------
pg_databse_test_1 | postgres | UTF8 | zh_CN.UTF-8 | zh_CN.UTF-8 |
postgres | postgres | UTF8 | zh_CN.UTF-8 | zh_CN.UTF-8 |
template0 | postgres | UTF8 | zh_CN.UTF-8 | zh_CN.UTF-8 | =c/postgres
: postgres=CTc/postgres
template1 | postgres | UTF8 | zh_CN.UTF-8 | zh_CN.UTF-8 | =c/postgres
: postgres=CTc/postgres
(4 rows)
postgres=#다른 명령줄 생성 방법:
[postgres@kevin ~]$ createdb pg_database_test_2;
[postgres@kevin ~]$ psql
psql (8.4.2)
Type "help" for help.
postgres=# \l
List of databases
Name | Owner | Encoding | Collation | Ctype | Access privileges
--------------------+----------+----------+-------------+-------------+-----------------------
pg_database_test_2 | postgres | UTF8 | zh_CN.UTF-8 | zh_CN.UTF-8 |
pg_databse_test_1 | postgres | UTF8 | zh_CN.UTF-8 | zh_CN.UTF-8 |
postgres | postgres | UTF8 | zh_CN.UTF-8 | zh_CN.UTF-8 |
template0 | postgres | UTF8 | zh_CN.UTF-8 | zh_CN.UTF-8 | =c/postgres
: postgres=CTc/postgres
template1 | postgres | UTF8 | zh_CN.UTF-8 | zh_CN.UTF-8 | =c/postgres
: postgres=CTc/postgres
(5 rows)
postgres=#3. 다른 데이터베이스 역할에 대한 데이터베이스를 만듭니다.
postgres=# \du
List of roles
Role name | Attributes | Member of
----------------+-------------+-----------
pg_test_user_3 | Create DB | {}
pg_test_user_4 | Create role | {}
: Create DB
postgres | Superuser | {}
: Create role
: Create DB
postgres=# CREATE DATABASE pg_database_3 OWNER pg_test_user_4;
CREATE DATABASE
postgres=# \l
List of databases
Name | Owner | Encoding | Collation | Ctype | Access privileges
--------------------+----------------+----------+-------------+-------------+-----------------------
pg_database_3 | pg_test_user_4 | UTF8 | zh_CN.UTF-8 | zh_CN.UTF-8 |
pg_database_test_2 | postgres | UTF8 | zh_CN.UTF-8 | zh_CN.UTF-8 |
pg_databse_test_1 | postgres | UTF8 | zh_CN.UTF-8 | zh_CN.UTF-8 |
postgres | postgres | UTF8 | zh_CN.UTF-8 | zh_CN.UTF-8 |
template0 | postgres | UTF8 | zh_CN.UTF-8 | zh_CN.UTF-8 | =c/postgres
: postgres=CTc/postgres
template1 | postgres | UTF8 | zh_CN.UTF-8 | zh_CN.UTF-8 | =c/postgres
: postgres=CTc/postgres
(6 rows)
postgres=#명령행 방법:
[postgres@kevin ~]$ createdb -O pg_test_user_3 pg_database_4;
[postgres@kevin ~]$ psql
psql (8.4.2)
Type "help" for help.
postgres=# \l
List of databases
Name | Owner | Encoding | Collation | Ctype | Access privileges
--------------------+----------------+----------+-------------+-------------+-----------------------
pg_database_3 | pg_test_user_4 | UTF8 | zh_CN.UTF-8 | zh_CN.UTF-8 |
pg_database_4 | pg_test_user_3 | UTF8 | zh_CN.UTF-8 | zh_CN.UTF-8 |
pg_database_test_2 | postgres | UTF8 | zh_CN.UTF-8 | zh_CN.UTF-8 |
pg_databse_test_1 | postgres | UTF8 | zh_CN.UTF-8 | zh_CN.UTF-8 |
postgres | postgres | UTF8 | zh_CN.UTF-8 | zh_CN.UTF-8 |
template0 | postgres | UTF8 | zh_CN.UTF-8 | zh_CN.UTF-8 | =c/postgres
: postgres=CTc/postgres
template1 | postgres | UTF8 | zh_CN.UTF-8 | zh_CN.UTF-8 | =c/postgres
: postgres=CTc/postgres
(7 rows)
postgres=#4. 템플릿 데이터베이스를 사용하여 만듭니다. 이때 템플릿에 대한 변경은 템플릿을 기반으로 만든 모든 데이터베이스 대상에 동일한 변경을 일으킵니다.
postgres=# CREATE DATABASE pg_datebase_5 TEMPLATE template0; /*SQL */
CREATE DATABASE
postgres=# \l
List of databases
Name | Owner | Encoding | Collation | Ctype | Access privileges
--------------------+----------------+----------+-------------+-------------+-----------------------
pg_database_3 | pg_test_user_4 | UTF8 | zh_CN.UTF-8 | zh_CN.UTF-8 |
pg_database_4 | pg_test_user_3 | UTF8 | zh_CN.UTF-8 | zh_CN.UTF-8 |
pg_database_test_2 | postgres | UTF8 | zh_CN.UTF-8 | zh_CN.UTF-8 |
pg_databse_test_1 | postgres | UTF8 | zh_CN.UTF-8 | zh_CN.UTF-8 |
pg_datebase_5 | postgres | UTF8 | zh_CN.UTF-8 | zh_CN.UTF-8 |
postgres | postgres | UTF8 | zh_CN.UTF-8 | zh_CN.UTF-8 |
template0 | postgres | UTF8 | zh_CN.UTF-8 | zh_CN.UTF-8 | =c/postgres
: postgres=CTc/postgres
template1 | postgres | UTF8 | zh_CN.UTF-8 | zh_CN.UTF-8 | =c/postgres
: postgres=CTc/postgres
(8 rows)
postgres=# \q
[postgres@kevin ~]$ createdb -T template0 pg_database_6 /* */
[postgres@kevin ~]$ psql
psql (8.4.2)
Type "help" for help.
postgres=# \l
List of databases
Name | Owner | Encoding | Collation | Ctype | Access privileges
--------------------+----------------+----------+-------------+-------------+-----------------------
pg_database_3 | pg_test_user_4 | UTF8 | zh_CN.UTF-8 | zh_CN.UTF-8 |
pg_database_4 | pg_test_user_3 | UTF8 | zh_CN.UTF-8 | zh_CN.UTF-8 |
pg_database_6 | postgres | UTF8 | zh_CN.UTF-8 | zh_CN.UTF-8 |
pg_database_test_2 | postgres | UTF8 | zh_CN.UTF-8 | zh_CN.UTF-8 |
pg_databse_test_1 | postgres | UTF8 | zh_CN.UTF-8 | zh_CN.UTF-8 |
pg_datebase_5 | postgres | UTF8 | zh_CN.UTF-8 | zh_CN.UTF-8 |
postgres | postgres | UTF8 | zh_CN.UTF-8 | zh_CN.UTF-8 |
template0 | postgres | UTF8 | zh_CN.UTF-8 | zh_CN.UTF-8 | =c/postgres
: postgres=CTc/postgres
template1 | postgres | UTF8 | zh_CN.UTF-8 | zh_CN.UTF-8 | =c/postgres
: postgres=CTc/postgres
(9 rows)
postgres=#5. 데이터베이스를 삭제합니다.
SQL 방법으로 제거:
postgres=# \l
List of databases
Name | Owner | Encoding | Collation | Ctype | Access privileges
--------------------+----------------+----------+-------------+-------------+-----------------------
pg_database_3 | pg_test_user_4 | UTF8 | zh_CN.UTF-8 | zh_CN.UTF-8 |
pg_database_4 | pg_test_user_3 | UTF8 | zh_CN.UTF-8 | zh_CN.UTF-8 |
pg_database_6 | postgres | UTF8 | zh_CN.UTF-8 | zh_CN.UTF-8 |
pg_database_7 | postgres | UTF8 | zh_CN.UTF-8 | zh_CN.UTF-8 |
pg_database_test_2 | postgres | UTF8 | zh_CN.UTF-8 | zh_CN.UTF-8 |
pg_databse_test_1 | postgres | UTF8 | zh_CN.UTF-8 | zh_CN.UTF-8 |
postgres | postgres | UTF8 | zh_CN.UTF-8 | zh_CN.UTF-8 |
template0 | postgres | UTF8 | zh_CN.UTF-8 | zh_CN.UTF-8 | =c/postgres
: postgres=CTc/postgres
template1 | postgres | UTF8 | zh_CN.UTF-8 | zh_CN.UTF-8 | =c/postgres
: postgres=CTc/postgres
(9 rows)
postgres=# DROP DATABASE pg_database_3;
DROP DATABASE
postgres=# DROP DATABASE pg_database_4;
DROP DATABASE
postgres=# DROP DATABASE pg_database_6;
DROP DATABASE
postgres=# DROP DATABASE pg_database_7;
DROP DATABASE
postgres=# \l
List of databases
Name | Owner | Encoding | Collation | Ctype | Access privileges
--------------------+----------+----------+-------------+-------------+-----------------------
pg_database_test_2 | postgres | UTF8 | zh_CN.UTF-8 | zh_CN.UTF-8 |
pg_databse_test_1 | postgres | UTF8 | zh_CN.UTF-8 | zh_CN.UTF-8 |
postgres | postgres | UTF8 | zh_CN.UTF-8 | zh_CN.UTF-8 |
template0 | postgres | UTF8 | zh_CN.UTF-8 | zh_CN.UTF-8 | =c/postgres
: postgres=CTc/postgres
template1 | postgres | UTF8 | zh_CN.UTF-8 | zh_CN.UTF-8 | =c/postgres
: postgres=CTc/postgres
(5 rows)
postgres=#명령줄로 삭제하려면 다음과 같이 하십시오.
postgres=# \q
[postgres@kevin ~]$ dropdb pg_database_test_2
[postgres@kevin ~]$ dropdb pg_databse_test_1
[postgres@kevin ~]$ psql
psql (8.4.2)
Type "help" for help.
postgres=# \l
List of databases
Name | Owner | Encoding | Collation | Ctype | Access privileges
-----------+----------+----------+-------------+-------------+-----------------------
postgres | postgres | UTF8 | zh_CN.UTF-8 | zh_CN.UTF-8 |
template0 | postgres | UTF8 | zh_CN.UTF-8 | zh_CN.UTF-8 | =c/postgres
: postgres=CTc/postgres
template1 | postgres | UTF8 | zh_CN.UTF-8 | zh_CN.UTF-8 | =c/postgres
: postgres=CTc/postgres
(3 rows)
postgres=#이 내용에 흥미가 있습니까?
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