postgresql 导出 导入 数据库

数据库的导出和导入很重要，一个网站什么比较值钱，就是数据,做好备份很重要。oracle和mysql请参考，oracle导入导出数据库，mysql导入导出数据库

1，查看一下原数据库

-bash-3.2$ psql -U playboy -d playboy                                    //原数据库
Welcome to psql 8.1.23, the PostgreSQL interactive terminal.
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

playboy=> \dt;
           List of relations
 Schema |    Name    | Type  |  Owner
--------+------------+-------+---------
 public | contents   | table | playboy
 public | entries    | table | playboy
 public | properties | table | playboy
 public | settings   | table | playboy
 public | test       | table | playboy
(5 rows)

playboy=> \q

2，导出数据库和表

-bash-3.2$ pg_dump -O playboy > /var/lib/pgsql/data/playboy2013.sql      //导出playboy数据库

-bash-3.2$ pg_dumpall > /var/lib/pgsql/data/all_databases2013.sql        //导出全部数据库

-bash-3.2$ pg_dump -O playboy -Ft -t test > /var/lib/pgsql/data/playboy_test2013.tar   //导出一张表.tar的文件供pg_restore

-bash-3.2$ ls /var/lib/pgsql/data |grep 2013                             //查看一下导好了
playboy2013.sql all_databases2013.sql playboy_test2013.tar

3，创建新数据库，并导入

-bash-3.2$ psql -U playboy -d playboy                                    //原数据库
Welcome to psql 8.1.23, the PostgreSQL interactive terminal.
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

playboy=> \dt;
           List of relations
 Schema |    Name    | Type  |  Owner
--------+------------+-------+---------
 public | contents   | table | playboy
 public | entries    | table | playboy
 public | properties | table | playboy
 public | settings   | table | playboy
 public | test       | table | playboy
(5 rows)

playboy=> \q

-bash-3.2$ createdb playboy_test -O playboy    //创建一个归属playboy的数据库playboy_test
CREATE DATABASE

-bash-3.2$ pg_restore -d playboy_test /var/lib/pgsql/data/playboy_test2013.tar     //导入单表，

//将上面导入表删除后，在把playboy的数据库导入到playboy_test中去,权限归属playboy
-bash-3.2$ psql -d playboy_test -U playboy -f /var/lib/pgsql/data/playboy2013.sql
SET
SET
SET
COMMENT
SET
CREATE SEQUENCE
 setval
--------
     18
(1 row)

SET
SET
CREATE TABLE
CREATE SEQUENCE
 setval
--------
      4
(1 row)

CREATE TABLE
CREATE TABLE
CREATE SEQUENCE
 setval
--------
      3
(1 row)

CREATE TABLE
CREATE TABLE
ALTER TABLE
ALTER TABLE
ALTER TABLE
ALTER TABLE
ALTER TABLE
CREATE INDEX
REVOKE
REVOKE
GRANT
GRANT

-bash-3.2$ psql -U playboy -d playboy_test         //登录到playboy_test
Welcome to psql 8.1.23, the PostgreSQL interactive terminal.

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

playboy_test=> \dt;                                //查看一下表，根playboy数据库一样的。
           List of relations
 Schema |    Name    | Type  |  Owner
--------+------------+-------+----------
 public | contents   | table | playboy
 public | entries    | table | playboy
 public | properties | table | playboy
 public | settings   | table | playboy
 public | test       | table | playboy
(5 rows)

pgsql导入写法比较多，上面已经有二种了，在说一种

-bash-3.2$ psql -U playboy playboy_test < /var/lib/pgsql/data/playboy2013.sql