mysql> SELECT SLEEP(5);
+----------+
| SLEEP(5) |
+----------+
|        0 |
+----------+
1 row in set (5.00 sec)

SET GLOBAL long_query_time = 2;

sudo dnf -y localinstall https://dev.mysql.com/get/mysql80-community-release-el9-1.noarch.rpm

sudo rpm --import https://repo.mysql.com/RPM-GPG-KEY-mysql-2023

→これを実行しないと「Error: GPG check FAILED」エラーになる

sudo dnf install -y mysql-community-server mysql-community-client mysql-community-devel

sudo systemctl enable mysqld.service

sudo systemctl start mysqld.service

sudo less /var/log/mysqld.log

mysql -uroot -p
# パスワード更新
ALTER USER 'root'@'localhost' IDENTIFIED BY '新しいパスワード';

alter table {テーブル名} add unique({インデックスを貼るカラム});

select version();

+-----------+
| version() |
+-----------+
| 8.0.37    |
+-----------+

# テーブル作成
create table user (id int, name varchar(10));

# データ登録
insert into user values (1, 'test_user'),(2, 'test_user');

# ユニークインデックスを貼る
alter table user add unique(name);

# 結果：エラー
ERROR 1062 (23000): Duplicate entry 'test_user' for key 'user.name'

# テーブル削除
drop table user;

# テーブル作成
create table user (id int, name varchar(10));

# データ登録
insert into user values (1, null),(2, null);

# ユニークインデックスを貼る
alter table user add unique(name);

# 結果：成功
Query OK, 0 rows affected (0.02 sec)

# テーブル削除
drop table user;

# テーブル作成
create table user (id int, name varchar(10));

# データ登録
insert into user values (1, 'test_user'),(2, 'test_user ');

# ユニークインデックスを貼る
alter table user add unique(name);

# 結果：成功
Query OK, 0 rows affected (0.02 sec)

# テーブル削除
drop table user;

# テーブル作成
create table user (id int, name varchar(10));

# データ登録
insert into user values (1, 'testuser'),(1, 'test user');

# ユニークインデックスを貼る
alter table user add unique(id,name);

# 結果：成功
Query OK, 0 rows affected (0.02 sec)

# テーブル削除
drop table user;

# テーブル作成
create table user (id int, name varchar(10));

# データ登録
insert into user values (1, 'test_user'),(1, ' test_user');

# ユニークインデックスを貼る
alter table user add unique(id,name);

# 結果：成功
Query OK, 0 rows affected (0.01 sec)

# テーブル削除
drop table user;

select version();

+-----------+
| version() |
+-----------+
| 5.7.44    |
+-----------+

# テーブル作成
create table user (id int, name varchar(10));

# データ登録
insert into user values (1, 'test_user'),(2, 'test_user');

# ユニークインデックスを貼る
alter table user add unique(name);

# 結果：エラー
ERROR 1062 (23000): Duplicate entry 'test_user' for key 'name'

# テーブル削除
drop table user;

# テーブル作成
create table user (id int, name varchar(10));

# データ登録
insert into user values (1, null),(2, null);

# ユニークインデックスを貼る
alter table user add unique(name);

# 結果：成功
Query OK, 0 rows affected (0.02 sec)

# テーブル削除
drop table user;

# テーブル作成
create table user (id int, name varchar(10));
# データ登録
insert into user values (1, 'test_user'),(2, 'test_user ');

# ユニークインデックスを貼る
alter table user add unique(name);

# 結果：エラー
ERROR 1062 (23000): Duplicate entry 'test_user' for key 'name'

# テーブル削除
drop table user;

# テーブル作成
create table user (id int, name varchar(10));

# データ登録
insert into user values (1, 'testuser'),(1, 'test user');

# ユニークインデックスを貼る
alter table user add unique(id,name);

# 結果：成功
Query OK, 0 rows affected (0.02 sec)

# テーブル削除
drop table user;

# テーブル作成
create table user (id int, name varchar(10));

# データ登録
insert into user values (1, 'test_user'),(1, ' test_user');

# ユニークインデックスを貼る
alter table user add unique(id,name);

# 結果：成功
Query OK, 0 rows affected (0.01 sec)

# テーブル削除
drop table user;

├── docker
│   ├── db  # MySQL(DB)コンテナの設定ファイル等を入れるディレクトリ
│   │   └── my.cnf
│   ├── nginx  # nginxコンテナの設定ファイル等を入れるディレクトリ
│   │   └── default.conf
│   └── php  # アプリ(PHP)コンテナの設定ファイル等を入れるディレクトリ
│       └── Dockerfile
└── docker-compose.yml

mkdir test_laravel
cd test_laravel/

vi docker-compose.yml

version: '3'
services:
  app:
    container_name: app_laravel  
    build: ./docker/php
    volumes:
      - .:/var/www
  nginx:
    image: nginx 
    container_name: nginx
    ports:
      - 8000:80 
    volumes:
      - .:/var/www
      - ./docker/nginx/default.conf:/etc/nginx/conf.d/default.conf
    working_dir: /var/www
    depends_on:
      - app
  db:
    image: mysql:8.0.36
    container_name: db
    environment: 
      MYSQL_ROOT_PASSWORD: password
      MYSQL_DATABASE: database 
    command: mysqld --character-set-server=utf8mb4 --collation-server=utf8mb4_unicode_ci
    volumes:  
      - ./docker/db/data:/var/lib/mysql
      - ./docker/db/my.cnf:/etc/mysql/conf.d/my.cnf 
      - ./docker/db/sql:/docker-entrypoint-initdb.d
    ports:
      - 3306:3306
  # phpMyAdmin
  phpmyadmin:
    container_name: test_phpmyadmin
    image: phpmyadmin
    environment:
    - PMA_USER=root
    - PMA_PASSWORD=password
    ports:
    - 8080:80

mkdir docker

mkdir docker/db

vi docker/db/my.conf

[mysqld]
character-set-server=utf8mb4
collation-server=utf8mb4_unicode_ci
default_authentication_plugin=mysql_native_password

[client]
default-character-set=utf8mb4

mkdir docker/nginx

vi docker/nginx/default.conf

server {
  listen 80;
  root /var/www/laravel-project/public;
  index index.php;
  location / {
    try_files $uri $uri/ /index.php?$query_string;
  }
  location ~ \.php$ {
    try_files $uri =404;
    fastcgi_split_path_info ^(.+\.php)(/.+)$;
    fastcgi_pass app:9000; 
    fastcgi_index index.php;
    include fastcgi_params;
    fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
    fastcgi_param PATH_INFO $fastcgi_path_info;
  }
}

mkdir docker/php

vi docker/php/Dockerfile

FROM php:8.3-fpm

RUN apt-get update \
  && apt-get install -y zlib1g-dev mariadb-client vim libzip-dev \
  && docker-php-ext-install zip pdo_mysql

#Composer install
RUN php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
RUN php composer-setup.php
RUN php -r "unlink('composer-setup.php');"
RUN mv composer.phar /usr/local/bin/composer

ENV COMPOSER_ALLOW_SUPERUSER 1

ENV COMPOSER_HOME /composer

ENV PATH $PATH:/composer/vendor/bin


WORKDIR /var/www

RUN composer global require "laravel/installer"

docker compose up -d

# アプリコンテナに入るコマンド
docker compose exec app bash

# Laravel11インストールコマンド
composer create-project --prefer-dist laravel/laravel laravel-project "11.*"

vi laravel-project/.env

DB_CONNECTION=mysql
DB_HOST=db
DB_PORT=3306
DB_DATABASE=laravel
DB_USERNAME=root
DB_PASSWORD=password

cd laravel-project/
php artisan migrate

curl -s "https://laravel.build/example-app" | bash

cd プロジェクト名 && ./vendor/bin/sail up

SQLSTATE[42S02]: Base table or view not found: 1146 Table 'laravel.sessions' doesn't exist

sudo rpm --import https://repo.mysql.com/RPM-GPG-KEY-mysql-2023

sudo rpm --import https://repo.mysql.com/RPM-GPG-KEY-mysql-2023

→これを実行しないと「Error: GPG check FAILED」エラーになる

sudo yum install mysql-shell

# MySQLに接続する
mysqlsh -uroot

#checkForServerUpgradeコマンド実行！！！
util.checkForServerUpgrade()

begin;

rollback;

commit;

create table user (id int, name varchar(10));

insert into user values (1, 'test_user1'),(2, 'test_user2');

mysql> begin;
Query OK, 0 rows affected (0.00 sec)
### トランザクションをスタート
mysql> update user set name = 'test1';
Query OK, 2 rows affected (0.00 sec)
Rows matched: 2  Changed: 2  Warnings: 0
### 更新件数を確認して、妥当性を確認

mysql> rollback;
Query OK, 0 rows affected (0.01 sec)
### ロールバックする

mysql> select name from user ;
+------------+
| name       |
+------------+
| test_user1 |
| test_user2 |
+------------+
2 rows in set (0.00 sec)
###ロールバックできたことを確認する

mysql> begin;
Query OK, 0 rows affected (0.00 sec)
### トランザクションをスタート

mysql> update user set name = 'test1' where id = 1;
Query OK, 1 row affected (0.00 sec)
Rows matched: 1 Changed: 1 Warnings: 0
### 更新件数を確認して、妥当性を確認

mysql> commit;
Query OK, 0 rows affected (0.00 sec)
### コミットする

mysql> select name from user ;
+------------+
| name       |
+------------+
| test1      |
| test_user2 |
+------------+
2 rows in set (0.00 sec)
###コミットできたことを確認する

mysql> begin;
Query OK, 0 rows affected (0.00 sec)
### トランザクションをスタート
mysql> delete from user;
Query OK, 2 rows affected (0.00 sec)
### 更新件数を確認して、妥当性を確認

mysql> rollback;
Query OK, 0 rows affected (0.01 sec)
### ロールバックする

mysql> select name from user ;
+------------+
| name       |
+------------+
| test_user1 |
| test_user2 |
+------------+
2 rows in set (0.00 sec)
###ロールバックできたことを確認する

mysql> begin;
Query OK, 0 rows affected (0.00 sec)
### トランザクションをスタート

mysql> delete from user where id = 1;
Query OK, 1 row affected (0.00 sec)
### 更新件数を確認して、妥当性を確認

mysql> commit;
Query OK, 0 rows affected (0.00 sec)
### コミットする

mysql> select name from user ;
+------------+
| name       |
+------------+
| test_user2 |
+------------+
1 row in set (0.00 sec)
###コミットできたことを確認する

-- 区切り文字を「//」に変更する
DELIMITER //

-- make_sample_dataというテストデータ作成用プロシージャーを作成する

create procedure make_sample_data(in i int)
begin
  declare count int default 0;
  -- 繰り返し
  while count < i do
    set count = count + 1;
    INSERT INTO user VALUES(count, MOD(count,2),CONCAT('usr_name_',count));
  end while;
end
//
-- 区切り文字を「;」に戻す
DELIMITER ;

create table user(
id INT,
type INT,
name VARCHAR(255)
) engine MyISAM;

mysql> select version();
+------------+
| version()  |
+------------+
| 5.7.41-log |
+------------+
1 row in set (0.00 sec)

call make_sample_data(10000);
Query OK, 1 row affected (24.96 sec)

select count(*) from user;
+----------+
| count(*) |
+----------+
|    10000 |
+----------+
0.00016000 

select * from user where id = 5000;
+------+------+---------------+
| id   | type | name          |
+------+------+---------------+
| 5000 |    0 | usr_name_5000 |
+------+------+---------------+
0.00127125 

update user set name = 'name_5001' where id = 5001;
0.06670350 

delete from user where id = 5002;
0.00380375 

create table user(
id INT,
type INT,
name VARCHAR(255)
) engine InnoDB;

call make_sample_data(10000);
Query OK, 1 row affected (53.24 sec)

select count(*) from user;
+----------+
| count(*) |
+----------+
|    10000 |
+----------+
0.00359175 

select * from user where id = 5000;
+------+------+---------------+
| id   | type | name          |
+------+------+---------------+
| 5000 |    0 | usr_name_5000 |
+------+------+---------------+
0.00401250

update user set name = 'name_500001' where id = 5001;
0.01640200 

delete from user where id = 5002;
0.00935400 

create table user(
id INT,
type INT,
name VARCHAR(255)
) engine MyISAM;

select version();
+-----------+
| version() |
+-----------+
| 8.0.32    |
+-----------+

call make_sample_data(10000);
Query OK, 1 row affected (21.39 sec)

select count(*) from user;
+----------+
| count(*) |
+----------+
|    10000 |
+----------+
0.00018900 

select * from user where id = 5000;

+------+------+---------------+
| id   | type | name          |
+------+------+---------------+
| 5000 |    0 | usr_name_5000 |
+------+------+---------------+
0.07204400 

update user set name = 'name_500001' where id = 5001;
0.02672875 

delete from user where id = 5002;
0.02560125

create table user(
id INT,
type INT,
name VARCHAR(255)
) engine InnoDB;

call make_sample_data(10000);
Query OK, 1 row affected (48.92 sec)

select count(*) from user;
+----------+
| count(*) |
+----------+
|    10000 |
+----------+
0.00850275

select * from user where id = 5000;
+------+------+---------------+
| id   | type | name          |
+------+------+---------------+
| 5000 |    0 | usr_name_5000 |
+------+------+---------------+
0.00575250 

update user set name = 'name_500001' where id = 5001;
0.01512700

delete from user where id = 5002;
0.01409000 

SELECT {取得したいカラム}
FROM
    (
        SELECT {取得したいカラム}
        FROM {テーブル名}

    ) AS {サブクエリ名}

create table user(
id INT,
type INT,
name VARCHAR(255)
);

INSERT INTO user VALUES(1, 2,'usr_name_1');

SELECT
    subquery.id
FROM
    (
        SELECT
            id
        FROM
            user
    ) AS subquery
;

+------+
| id   |
+------+
|    1 |
+------+
1 row in set (0.00 sec)

create table user(
id INT AUTO_INCREMENT,
type INT,
name VARCHAR(255),
PRIMARY KEY (id)
);

create table user_score(
id INT AUTO_INCREMENT,
user_id INT,
score INT,
PRIMARY KEY (id), index(user_id)
);

-- 区切り文字を「//」に変更する
DELIMITER //

-- make_sample_dataというテストデータ作成用プロシージャーを作成する

create procedure make_sample_data(in i int)
begin
  declare count int default 0;
  -- 繰り返し
  while count < i do
    set count = count + 1;
    INSERT INTO user (type, name) VALUES(MOD(count,2),CONCAT('usr_name_',count));
    INSERT INTO user_score (user_id, score) VALUES(count, CEIL(RAND() * 1000));
    INSERT INTO user_score (user_id, score) VALUES(count, CEIL(RAND() * 1000));
    INSERT INTO user_score (user_id, score) VALUES(count, CEIL(RAND() * 1000));
  end while;
end
//
-- 区切り文字を「;」に戻す
DELIMITER ;

mysql> call make_sample_data(1000000);
Query OK, 1 row affected (4 min 29.74 sec)

mysql> select version();
+-----------+
| version() |
+-----------+
| 8.0.26    |
+-----------+
1 row in set (0.02 sec)

select max(score_sum.sum) as max from (
        SELECT
            `user_id`,
           SUM(`score`) AS `sum`
        FROM
            `user_score`
        GROUP BY
            `user_id`
    ) AS `score_sum`
;

// 実行結果
+------+
| max  |
+------+
| 2998 |
+------+
1 row in set (10.51 sec)

SELECT
    `user`.*,
    `score`.`average`
FROM
    (
        SELECT
            `user_id`,
            AVG(`score`) AS `average`
        FROM
            `user_score`
        GROUP BY
            `user_id`
        HAVING `average` > 990
    ) AS `score`
    JOIN
        `user`
    ON  `user`.`id` = `score`.`user_id`
;

// 実行結果
59 rows in set (8.75 sec)

SELECT
    `user`.*,
    AVG(`user_score`.`score`) AS `average`
FROM
    `user`
    LEFT JOIN
        `user_score`
    ON  `user`.`id` = `user_score`.`user_id`
GROUP BY
    `user_id`
HAVING `average` > 990
;

// 実行結果
59 rows in set (17.68 sec)