create table parent (
  id bigint not null auto_increment,
  name varchar(255),
  primary key (id)
);

create table children (
  id bigint not null auto_increment,
  parent_id bigint not null,
  name varchar(255),
  primary key (id),
  foreign key (parent_id) references parent (id) on delete restrict
);

% brew install graphviz

% dot -Tpng development.dot > development.png

create table parent (
  id bigint not null auto_increment,
  name varchar(255),
  primary key (id)
);

create table children (
  id bigint not null auto_increment,
  parent_id bigint not null,  -- NOTE: not null制約
  name varchar(255),
  primary key (id),
  foreign key (parent_id) references parent (id) on delete restrict -- NOTE: restrict制約
);

insert into parent (name) values ('name');

-- NOTE: parentに紐づくchidrenデータ
insert into children (name, parent_id) values ('children1', 1); 
insert into children (name, parent_id) values ('children2', 1);

mysql> select * from parent;
+----+------+
| id | name |
+----+------+
|  1 | name |
+----+------+

mysql> select * from children;
+----+-----------+-----------+
| id | parent_id | name      |
+----+-----------+-----------+
|  1 |         1 | children1 |
|  2 |         1 | children2 |
+----+-----------+-----------+

mysql> delete from parent where id = 1;
ERROR 1451 (23000): Cannot delete or update a parent row: 
a foreign key constraint fails (`development`.`children`, CONSTRAINT `children_ibfk_1` FOREIGN KEY (`parent_id`) REFERENCES `parent` (`id`))

-- NOTE: 必要に応じてテーブルを削除してください。
drop table children;
drop table parent;

-- NOTE: テーブル作成
create table parent (
  id bigint not null auto_increment,
  name varchar(255),
  primary key (id)
);

create table children (
  id bigint not null auto_increment,
  parent_id bigint not null,　-- NOTE: not null制約
  name varchar(255),
  primary key (id),
  foreign key (parent_id) references parent (id) on delete cascade　-- NOTE: cascade制約
);

insert into parent (name) values ('name');

-- NOTE: parentに紐づくchidrenデータ
insert into children (name, parent_id) values ('children1', 1); 
insert into children (name, parent_id) values ('children2', 1);

mysql> delete from parent where id = 1;
Query OK, 1 row affected (0.02 sec)

mysql> select * from parent;
Empty set (0.00 sec)

mysql> select * from children;
Empty set (0.01 sec)

-- NOTE: 必要に応じてテーブルを削除してください。
drop table children;
drop table parent;

-- NOTE: テーブル作成
create table parent (
  id bigint not null auto_increment,
  name varchar(255),
  primary key (id)
);

create table children (
  id bigint not null auto_increment,
  parent_id bigint, -- NOTE: null許容
  name varchar(255),
  primary key (id),
  foreign key (parent_id) references parent (id) on delete set null -- NOTE: set null制約
);

insert into parent (name) values ('name');

-- NOTE: parentに紐づくchidrenデータ
insert into children (name, parent_id) values ('children1', 1); 
insert into children (name, parent_id) values ('children2', 1);

mysql> delete from parent where id = 1;
Query OK, 1 row affected (0.02 sec)

mysql> select * from parent;
Empty set (0.01 sec)

mysql> select * from children;
+----+-----------+-----------+
| id | parent_id | name      |
+----+-----------+-----------+
|  1 |      NULL | children1 |
|  2 |      NULL | children2 |
+----+-----------+-----------+
2 rows in set (0.00 sec)

create database [db_name];

create database development;

create table if not exists [table_name] (
  [column_name] [column_type],
  ...
);

create table if not exists user (
  id int,
  name varchar(10),
  primary key (id)
);

drop table [table_name];

drop table user;

insert into [table_name]
values ([value1], [value2], ...);

insert into user
values (1, 'name-1');

update [table_name]
set [column_name] = [value]
[where where_condition];

update user
set name = 'name-2'
where id = 1;

delete from [table_name]
[WHERE where_condition];

delete from user
where id = 1;

select [column_name1], [column_name2], ... from [table_name]
[WHERE where_condition];

select id, name from user
where id = 1;

describe table [table_name];

describe table user;

mysql> select * from users where id in ();
ERROR 1064 (42000): You have an error in your SQL syntax;
check the manual that corresponds to your MySQL server version for the right syntax to use near ')' at line 1

mysql> select * from users where id in (null);
Empty set (0.00 sec)

mysql> select * from users where id in ();
ERROR 1064 (42000): You have an error in your SQL syntax;
check the manual that corresponds to your MySQL server version for the right syntax to use near ')' at line 1 

$where = array(
  array('id', 'in', $ids)
);
$users = Model_User::find('all', compact("where"));

$where = array(
  array('id', 'in', ($ids ? $ids : array(null)))
);
$users = Model_User::find('all', compact("where"));

version: '3'
services:
  mysql:
    image: mysql:5.7
    environment:
      MYSQL_DATABASE: development
      MYSQL_PASSWORD: password
      MYSQL_ROOT_PASSWORD: password
    # 文字化け対応
    command: mysqld --character-set-server=utf8mb4 --collation-server=utf8mb4_unicode_ci
    ports:
     - 3308:3306

$ docker-compose up

$ docker exec -it <MySQLのコンテナ名> bash

$ docker exec -it mysql bash

# mysql -u root -ppassword development

$ mysql -u <ユーザー名> -p<パスワード> -h <ホスト名> -P <ポート名> <DB名>

$ mysql -u root -ppawwrod -h 127.0.0.1 -P 3308 development

CREATE TABLE `users` (
  `id` int(10) NOT NULL AUTO_INCREMENT, PRIMARY KEY(id) COMMENT 'ID',
  `email` varchar(256) NOT NULL COMMENT 'メールアドレス',
  `created` datetime NOT NULL DEFAULT '0000-00-00 00:00:00' COMMENT '登録日',
  `updated` datetime NOT NULL DEFAULT '0000-00-00 00:00:00' COMMENT '更新日'
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COMMENT='ユーザー';

ERROR 1067 (42000): Invalid default value for 'created'

CREATE TABLE `users` (
  `id` int(10) NOT NULL AUTO_INCREMENT, PRIMARY KEY(id) COMMENT 'ID',
  `email` varchar(256) NOT NULL COMMENT 'メールアドレス',
  `created` datetime NOT NULL DEFAULT '1000-01-01 00:00:00' COMMENT '登録日',
  `updated` datetime NOT NULL DEFAULT '1000-01-01 00:00:00' COMMENT '更新日'
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COMMENT='ユーザー';

SET sql_mode = 'NO_ZERO_DATE';
CREATE TABLE `invoices` (
  `id` int(10) NOT NULL AUTO_INCREMENT, PRIMARY KEY(id) COMMENT 'ID',
  `email` varchar(256) NOT NULL COMMENT 'メールアドレス',
  `created` datetime NOT NULL DEFAULT '0000-00-00 00:00:00' COMMENT '登録日',
  `updated` datetime NOT NULL DEFAULT '0000-00-00 00:00:00' COMMENT '更新日'
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COMMENT='ユーザー';