Postgresql入门

13.2

#1. 宿主机：创建mount目录
mkdir -p /custom/mount/mypg1

cd /custom/mount/mypg1
#2. 获取默认配置，并存放在宿主机目录
docker run -i --rm postgres:13.2  cat /usr/share/postgresql/postgresql.conf.sample > my-postgres.conf

#3. 创建容器
docker run -d 
		--name mypg1   # 容器名称 mypg1
		-p 5432:5432   # 端口映射
		-e PGDATA=/var/lib/postgresql/data/pgdata  # 设置 padata目录
		-v /custom/mount/mypg1/data:/var/lib/postgresql/data  # pgdata目录 挂载至宿主机目录
		-v /custom/mount/mypg1/my-postgres.conf:/etc/postgresql/postgresql.conf  # 配置文件 映射至 宿主机文件
		-e POSTGRES_PASSWORD=admin   # 设置postgres 密码
		postgres:13.2  # 指定镜像版本： 13.2
		-c 'config_file=/etc/postgresql/postgresql.conf' # 指定配置文件
        

容器创建结果

#方法1 
#进入容器
[root@localhost mount]# docker exec -it mypg1 /bin/bash 
#使用psql终端命令连接
# -U 指定用户， -d 指定数据库
root@f4b1c4d15d5b:/# psql -U postgres -d postgres

# 方法2
[root@localhost mount]# docker exec -it mypg1 psql -U postgres -d postgres


# 检验
postgres=# select current_database();
 current_database 
------------------
 postgres
(1 row)

# 1. 创建数据库 db01
postgres=# create database db01;

# 2. 查看数据库清单
postgres=# l
                                 List of databases
   Name    |  Owner   | Encoding |  Collate   |   Ctype    |   Access privileges   
-----------+----------+----------+------------+------------+-----------------------
 db01      | postgres | UTF8     | en_US.utf8 | en_US.utf8 | 
 postgres  | postgres | UTF8     | en_US.utf8 | en_US.utf8 | 
....
(4 rows)

# 3. 选择数据库
postgres=# c db01;
You are now connected to database "db01" as user "postgres".
db01=# 

# 4. 创建表
db01=# CREATE TABLE COMPANY(
   ID INT PRIMARY KEY     NOT NULL,
   NAME           TEXT    NOT NULL,
   AGE            INT     NOT NULL,
   ADDRESS        CHAr(50),
   SALARY         REAL
);


# 5. 查看表创建状态
db01=# d
          List of relations
 Schema |  Name   | Type  |  Owner   
--------+---------+-------+----------
 public | company | table | postgres
(1 row)

# 6. 查看表详情
db01=# d company
                  Table "public.company"
 Column  |     Type      | Collation | Nullable | Default 
---------+---------------+-----------+----------+---------
 id      | integer       |           | not null | 
 name    | text          |           | not null | 
 age     | integer       |           | not null | 
 address | character(50) |           |          | 
 salary  | real          |           |          | 
Indexes:
    "company_pkey" PRIMARY KEY, btree (id)


# 7. 创建schema
## PostgreSQL 模式（SCHEMA）可以看着是一个表的集合。
## 一个模式可以包含视图、索引、数据类型、函数和操作符等。
db01=# create schema myschema1;
CREATE SCHEMA


# 8. help 
db01-# ?
Informational
  (options: S = show system objects, + = additional detail) 
  d[S+]                 list tables, views, and sequences
  d[S+]  NAME           describe table, view, sequence, or index
  di[S+] [PATTERN]      list indexes
  dn[S+] [PATTERN]      list schemas
  l[+]   [PATTERN]      list databases
  
Connection
  c[onnect] {[DBNAME|- USER|- HOST|- PORT|-] | conninfo}
                         connect to new database (currently "db01")

# 9. 退出psql
db01-# q

# 1. 创建一个用户
db01=# CREATE USER scott WITH PASSWORD 'tiger';
CREATE ROLE

# 2.修改密码
postgres=# ALTER USER scott WITH PASSWORD '123456';
ALTER ROLE

GRANT privilege [, ...] # 值可以为：SELECT，INSERT，UPDATE，DELETE， RULE，ALL。
ON object [, ...] 		# 可能的对象有： table， view，sequence。
TO { PUBLIC | GROUP group | username } # PUBLIC:表示所有用户, GROUP group − 为用户组授予权限, username:要授予权限的用户名

# 1. 选择数据库
postgres-# c db01;

# 2. 将 COMPANY表 的权限 授予 scott
db01=# GRANT ALL ON COMPANY TO scott;
GRANT
# 3. 取消授权
runoobdb=# REVOKE ALL ON COMPANY FROM scott;
REVOKE

postgres=# CREATE DATABASE testdb OWNER scott;
CREATE DATABASE

postgres=# GRANT ALL PRIVILEGES ON DATABASE testdb TO scott;