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https://github.com/ghusta/docker-postgres-world-db
Example Database for PostgreSQL : World DB
https://github.com/ghusta/docker-postgres-world-db
database docker example postgresql
Last synced: about 1 month ago
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Example Database for PostgreSQL : World DB
- Host: GitHub
- URL: https://github.com/ghusta/docker-postgres-world-db
- Owner: ghusta
- Created: 2017-05-16T09:23:41.000Z (over 7 years ago)
- Default Branch: master
- Last Pushed: 2024-08-11T14:50:53.000Z (about 1 month ago)
- Last Synced: 2024-08-11T15:50:53.612Z (about 1 month ago)
- Topics: database, docker, example, postgresql
- Language: PLpgSQL
- Homepage:
- Size: 513 KB
- Stars: 40
- Watchers: 3
- Forks: 33
- Open Issues: 3
-
Metadata Files:
- Readme: README.md
- Changelog: CHANGELOG.md
Awesome Lists containing this project
- jimsghstars - ghusta/docker-postgres-world-db - Example Database for PostgreSQL : World DB (PLpgSQL)
README
# postgres-world-db
[](https://github.com/ghusta/docker-postgres-world-db/actions/workflows/docker-image.yml)
[](https://hub.docker.com/r/ghusta/postgres-world-db)
[](https://github.com/ghusta/docker-postgres-world-db/releases)
Example Database for [PostgreSQL](https://www.postgresql.org/) : World DB
Database script downloaded at : http://pgfoundry.org/frs/?group_id=1000150&release_id=366#world-world-1.0-title-content
See also PostgreSQL [Sample Databases](https://wiki.postgresql.org/wiki/Sample_Databases).
# Database details
**Important note** : from version 2.0, tables and columns names use [_snake case_](https://en.wikipedia.org/wiki/Snake_case).
This version is incompatible with version 1.x.
## Default parameters
- database : world-db
- user : world
- password : world123
## Schema
- public
## Tables
This database contains 4 tables :
- city
- country
- country_language
- country_flag
## Relationships
- country_language -> country (country_language_country_code_fkey)
- city -> country (country_fk)
- country -> city (country_capital_fkey)
# Run a Docker container
You can run a Docker container with this command (replace _xxxx_ by your local port) :
```shell
docker run -d -p xxxx:5432 ghusta/postgres-world-db:2.11
```
# PostgreSQL configuration
If you need to inspect the PostgreSQL server configuration, you can print this file : `/var/lib/posgtresql/data/postgresql.conf`.
All settings are documented here : https://www.postgresql.org/docs/current/runtime-config.html
With Docker, you can run :
```shell
docker exec cat /var/lib/postgresql/data/postgresql.conf
```
## Log all statements
To log all statements, you can activate this line in the configuration :
`log_min_duration_statement = 0`
## Log categories of statements
You can also log only some categories of statements with `log_statement`.
Valid values are `none, ddl, mod, all`. Default is `none`.
See details : https://www.postgresql.org/docs/current/runtime-config-logging.html
# Test it
## With the psql CLI command
```shell
docker exec -it psql -d world-db -U world
```
Then try a command, like :
### List of relations
```PLSQL
psql (15.0 (Debian 15.0-1.pgdg110+1))
Type "help" for help.
world-db=# \d
List of relations
Schema | Name | Type | Owner
--------+------------------+-------+-------
public | city | table | world
public | country | table | world
public | country_flag | table | world
public | country_language | table | world
(4 rows)
```
### List of schemas
```PLSQL
world-db=# \dn
List of schemas
Name | Owner
--------+-------
public | world
(1 row)
```
### Describe the city table
```PLSQL
world-db=# \d+ city
...
```
### A simple query
```PLSQL
world-db=# select * from city limit 10;
1 | Kabul | AFG | Kabol | 1780000
2 | Qandahar | AFG | Qandahar | 237500
3 | Herat | AFG | Herat | 186800
4 | Mazar-e-Sharif | AFG | Balkh | 127800
5 | Amsterdam | NLD | Noord-Holland | 731200
6 | Rotterdam | NLD | Zuid-Holland | 593321
7 | Haag | NLD | Zuid-Holland | 440900
8 | Utrecht | NLD | Utrecht | 234323
9 | Eindhoven | NLD | Noord-Brabant | 201843
10 | Tilburg | NLD | Noord-Brabant | 193238
```
## With Java
### Plain Java with JDBC
First add the [PostgreSQL JDBC Driver](https://jdbc.postgresql.org/), with Maven for example : [org.postgresql » postgresql](https://mvnrepository.com/artifact/org.postgresql/postgresql).
Then execute a test query with :
```java
package org.example;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
public class JdbcDemo {
public static void main(String[] args) {
String jdbcUrl = "jdbc:postgresql://localhost:5432/world-db";
String user = "world";
String password = "world123";
try (Connection conn = DriverManager.getConnection(jdbcUrl, user, password)) {
String query = "select count(*) from city";
try (Statement stmt = conn.createStatement()) {
ResultSet rs = stmt.executeQuery(query);
while (rs.next()) {
int count = rs.getInt(1);
System.out.println("Count = " + count);
}
} catch (SQLException e) {
e.printStackTrace();
}
} catch (SQLException e) {
e.printStackTrace();
}
}
}
```
### Spring Boot
Initialize a [Spring Boot project](https://start.spring.io/) with dependencies _PostgreSQL Driver_ and [_Spring Data JPA_](https://spring.io/projects/spring-data-jpa) (or [_Spring Data JDBC_](https://spring.io/projects/spring-data-jdbc) if you want to keep simple).
Add these properties in _application.properties_ :
- `spring.datasource.url=jdbc:postgresql://localhost:5432/world-db`
- `spring.datasource.username=world`
- `spring.datasource.password=world123`
Then just add JPA entities for each table (City, Country), and interfaces for each DAO which extends `JpaRepository`.
## With Python
Install [psycopg 3](https://pypi.org/project/psycopg/), a PostgreSQL database adapter for Python.
> pip install psycopg
Then create a connection...
```python
import psycopg
DB_HOST = "localhost"
DB_PORT = "5432"
DB_NAME = "world-db"
DB_USER = "world"
DB_PASS = "world123"
with psycopg.connect(dbname=DB_NAME, user=DB_USER, password=DB_PASS, host=DB_HOST, port=DB_PORT) as conn:
with conn.cursor() as cur:
cur.execute("select count(*) from city")
row = cur.fetchone()
print('Count = ', row[0])
```
# Alternatives
You can find alternative DBMS or databases examples [at this page](ALTERNATIVES.md).