MogDB 使用样本数据集 Mogila
MogDB 提供了一个样本数据集 Mogila，本数据集借鉴了适用于 MySQL 的Sakila 示例数据库。Sakila最初由 MySQL AB 文档团队的 Mike Hillyer 开发，其目的是提供一个可用于书籍、教程、文章、样本等示例的标准 schema。

Mogila 数据集是一个关于 DVD 出租店信息的数据库，包含有关电影（如标题、类别、女演员）、出租店（如地址、工作人员、客户）和出租的信息。您可以使用 Mogila 数据库进行各种功能测试。

Mogila 适用于 MogDB 2.1 及更高版本。

实体-关系模型图
下图展示了 Mogila 数据库表和视图的概览。您可以查看不同表之间如何通过各个字段相互关联。例如，film表具有title和description列。它还通过列language_id和original_language_id与language表相关联。因此您可以联结这两个表来获取每部电影的语言，或者列出特定语言的所有电影。

在 MogDB 容器版中使用 Mogila
MogDB 容器版本已经内置了 Mogila 样本数据库，无需额外安装。

安装 MogDB 容器版。

使用样本数据库 Mogila：

docker exec -it mogdb bash
omm@eb7aef3f860f:~$ gsql -d mogila -p5432
gsql ((MogDB x.x.x build 56189e20) compiled at 2022-01-07 18:47:53 commit 0 last mr )
Non-SSL connection (SSL connection is recommended when requiring high-security)
Type "help" for help.

mogila=# \dt
List of relations
Schema | Name | Type | Owner | Storage
--------+---------------+-------+-------+----------------------------------
public | actor | table | mogdb | {orientation=row,compression=no}
public | address | table | mogdb | {orientation=row,compression=no}
public | category | table | mogdb | {orientation=row,compression=no}
public | city | table | mogdb | {orientation=row,compression=no}
public | country | table | mogdb | {orientation=row,compression=no}
public | customer | table | mogdb | {orientation=row,compression=no}
public | film | table | mogdb | {orientation=row,compression=no}
public | film_actor | table | mogdb | {orientation=row,compression=no}
public | film_category | table | mogdb | {orientation=row,compression=no}
public | inventory | table | mogdb | {orientation=row,compression=no}
public | language | table | mogdb | {orientation=row,compression=no}
public | payment | table | mogdb | {orientation=row,compression=no}
public | rental | table | mogdb | {orientation=row,compression=no}
public | staff | table | mogdb | {orientation=row,compression=no}
public | store | table | mogdb | {orientation=row,compression=no}
(15 rows)

mogila=#
在 MogDB 企业版中使用 Mogila
安装 MogDB 企业版。

创建样本数据库 mogila 及 mogdb 用户，然后登出：

切换到omm用户

[root@test ~]# su - omm

登录postgres数据库，根据实际情况填写端口号

[omm@test ~]$ gsql -d postgres -p5432 -r
gsql ((MogDB x.x.x build 56189e20) compiled at 2022-01-07 18:47:53 commit 0 last mr )
Non-SSL connection (SSL connection is recommended when requiring high-security)
Type "help" for help.
MogDB=#create database mogila DBCOMPATIBILITY='PG';
CREATE DATABASE
MogDB=#create user mogdb password '*@';
CREATE ROLE
MogDB=#\q
[omm@test ~]$
下载 mogila，并上传至服务器中，进入 mogila 所在目录。

创建模式对象，然后手动插入数据：

4.1 创建所有模式对象（表等）：
gsql -d mogila -p5432 -f mogila-schema.sql

4.2 插入所有数据：
gsql -d mogila -p5432 -f mogila-data.sql

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或者通过 1 个脚本创建模式对象并插入数据，如果您已经完成步骤 4.1 和 4.2，则无需执行步骤 5。

创建所有模式对象（表等）并插入所有数据：

gsql -d mogila -p5432 -f mogila-insert-data.sql
使用样本数据库 Mogila：

[omm@test ~]$ gsql -d mogila -p5432 -r
gsql ((MogDB x.x.x build 56189e20) compiled at 2022-01-07 18:47:53 commit 0 last mr )
Non-SSL connection (SSL connection is recommended when requiring high-security)
Type "help" for help.

mogila=# \dt
List of relations
Schema | Name | Type | Owner | Storage
--------+---------------+-------+-------+----------------------------------
public | actor | table | mogdb | {orientation=row,compression=no}
public | address | table | mogdb | {orientation=row,compression=no}
public | category | table | mogdb | {orientation=row,compression=no}
public | city | table | mogdb | {orientation=row,compression=no}
public | country | table | mogdb | {orientation=row,compression=no}
public | customer | table | mogdb | {orientation=row,compression=no}
public | film | table | mogdb | {orientation=row,compression=no}
public | film_actor | table | mogdb | {orientation=row,compression=no}
public | film_category | table | mogdb | {orientation=row,compression=no}
public | inventory | table | mogdb | {orientation=row,compression=no}
public | language | table | mogdb | {orientation=row,compression=no}
public | payment | table | mogdb | {orientation=row,compression=no}
public | rental | table | mogdb | {orientation=row,compression=no}
public | staff | table | mogdb | {orientation=row,compression=no}
public | store | table | mogdb | {orientation=row,compression=no}
(15 rows)

mogila=#
示例查询
本节通过一些查询来展示如何使用样本数据库 Mogila。所有查询结果仅展示前 10 项。

按长度排序列出所有电影

select film_id, title, length from film order by length desc;

select category.name, count(category.name) category_count from category left join film_category on category.category_id = film_category.category_id left join film on film_category.film_id = film.film_id group by category.name order by category_count desc;

select actor.first_name, actor.last_name, count(actor.first_name) featured_count from actor left join film_actor on actor.actor_id = film_actor.actor_id group by actor.first_name, actor.last_name order by featured_count desc;

select first_name, last_name from customer where active = 1 order by first_name asc;

select customer.first_name, customer.last_name, count(customer.first_name) rentals_count from customer left join rental on customer.customer_id = rental.customer_id group by customer.first_name, customer.last_name order by rentals_count desc;

select store.store_id, sum(payment.amount) as "total revenue" from store left join inventory on inventory.store_id = store.store_id left join rental on rental.inventory_id = inventory.inventory_id left join payment on payment.rental_id = rental.rental_id where payment.amount is not null group by store.store_id order by sum(payment.amount) desc;

select category.name, film.title, sum(payment.amount) as "gross revenue" from film left join film_category on film_category.film_id = film.film_id left join category on film_category.category_id = category.category_id left join inventory on inventory.film_id = film.film_id left join rental on rental.inventory_id = inventory.inventory_id left join payment on payment.rental_id = rental.rental_id where payment.amount is not null group by category.name, film.title order by sum(payment.amount) desc limit 5;

select film.title, film.description from film where to_tsvector(film.description) @@ to_tsquery('documentary & robot');

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清理
如需清理环境并删除样本数据库，请运行以下命令：

\c postgres;
DROP DATABASE mogila;