pgsql基本操作

leellun2024-06-05 2:36

查看已经存在的数据库

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postgres=# \l
                             List of databases
   Name    |  Owner   | Encoding | Collate | Ctype |   Access privileges   
-----------+----------+----------+---------+-------+-----------------------
 postgres  | postgres | UTF8     | C       | C     | 
 runoobdb  | postgres | UTF8     | C       | C     | 
(4 rows)

进入数据库：

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postgres=# \c runoobdb
You are now connected to database "runoobdb" as user "postgres".

连接数据库

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$ psql -h localhost -p 5432 -U postgres runoobdb
Password for user postgres: ****
psql (11.3)
Type "help" for help.
You are now connected to database "runoobdb" as user "postgres".
runoobdb=#

删除数据库

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postgres=# DROP DATABASE runoobdb;

查看所有表

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\d

查看表信息

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runoobdb=# \d company
                  Table "public.company"
 Column  |     Type      | Collation | Nullable | Default 
---------+---------------+-----------+----------+-------

删除表

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runoobdb=# drop table department

12.PostgreSQL 导出数据库：（以数据库名为work_face为例）

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pg_dump -h 127.0.0.1 -p 5432 -U postgres -d work_face  -Fc -f C:\Users\admin\Desktop\work_face.dmp

PostgreSQL 导入数据库：（以数据库名为work_face为例）

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pg_restore -h 127.0.0.1 -U postgres -d work_face C:\Users\admin\Desktop\work_face.dmp

查看当前活动

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SELECT  pid,  usename AS username,  datname AS database_name,  application_name AS application,  state,  query FROM  pg_stat_activity;

查看指定表索引信息

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SELECT    indexname AS index_name,    indexdef AS index_definition FROM pg_indexes WHERE tablename = 'event_log';