将键与 MySQL 中的表匹配

Question

我有这样的表：

CREATE TABLE `psAdmin` (
  `id_admin` INT(10) UNSIGNED NOT NULL,
  `enable` CHAR(1) COLLATE utf8_unicode_ci NOT NULL DEFAULT '0',
  `company_id` INT(11) NOT NULL,
  `username` VARCHAR(50) COLLATE utf8_unicode_ci NOT NULL,
  `password` VARCHAR(128) COLLATE utf8_unicode_ci NOT NULL,
  `salt` VARCHAR(128) COLLATE utf8_unicode_ci NOT NULL,
  `last_logged_in_date` datetime NOT NULL,
  `valid_account_in_time` CHAR(1) COLLATE utf8_unicode_ci NOT NULL DEFAULT '0',
  `expiration_date` DATE NOT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;

CREATE TABLE `psAdminDetails` (
  `id_admin_details` INT(10) UNSIGNED NOT NULL,
  `id_admin` INT(10) UNSIGNED NOT NULL,
  `name` VARCHAR(60) COLLATE utf8_unicode_ci DEFAULT NULL,
  `company_name` VARCHAR(120) COLLATE utf8_unicode_ci DEFAULT NULL,
  `nip` VARCHAR(20) COLLATE utf8_unicode_ci DEFAULT NULL,
  `street` VARCHAR(70) COLLATE utf8_unicode_ci DEFAULT NULL,
  `city` VARCHAR(50) COLLATE utf8_unicode_ci DEFAULT NULL,
  `post_code` VARCHAR(12) COLLATE utf8_unicode_ci DEFAULT NULL,
  `country_id` INT(11) NOT NULL DEFAULT '0',
  `provincial_id` INT(11) NOT NULL DEFAULT '0',
  `avatar` VARCHAR(65) COLLATE utf8_unicode_ci DEFAULT NULL,
  `level` CHAR(1) COLLATE utf8_unicode_ci NOT NULL DEFAULT '0',
  `notes` text COLLATE utf8_unicode_ci
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;

CREATE TABLE `psAdminLoginAttempts` (
  `id_admin_login_attempts` INT(10) UNSIGNED NOT NULL,
  `id_admin` INT(10) UNSIGNED NOT NULL,
  `time` datetime NOT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;

CREATE TABLE `psAdminLoginHistory` (
  `id_admin_history` INT(10) UNSIGNED NOT NULL,
  `id_admin` INT(10) UNSIGNED NOT NULL,
  `time` datetime NOT NULL,
  `ip` VARCHAR(25) COLLATE utf8_unicode_ci NOT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;

CREATE TABLE `psCompany` (
  `id_company` INT(10) UNSIGNED NOT NULL,
  `enable` CHAR(1) COLLATE utf8_unicode_ci NOT NULL DEFAULT '0',
  `name` VARCHAR(85) COLLATE utf8_unicode_ci DEFAULT NULL,
  `nip` VARCHAR(20) COLLATE utf8_unicode_ci DEFAULT NULL,
  `notes` text COLLATE utf8_unicode_ci,
  `street` VARCHAR(70) COLLATE utf8_unicode_ci DEFAULT NULL,
  `city` VARCHAR(50) COLLATE utf8_unicode_ci DEFAULT NULL,
  `post_code` VARCHAR(12) COLLATE utf8_unicode_ci DEFAULT NULL,
  `country_id` INT(11) NOT NULL DEFAULT '0',
  `provincial_id` INT(11) NOT NULL DEFAULT '0',
  `contact_person` VARCHAR(50) COLLATE utf8_unicode_ci DEFAULT NULL,
  `email` VARCHAR(50) COLLATE utf8_unicode_ci DEFAULT NULL,
  `www` VARCHAR(50) COLLATE utf8_unicode_ci DEFAULT NULL,
  `phone_number` VARCHAR(25) COLLATE utf8_unicode_ci DEFAULT NULL,
  `date_of_registration` datetime NOT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;

CREATE TABLE `psProvincial` (
  `provincial_id` INT(10) UNSIGNED NOT NULL,
  `name` VARCHAR(35) COLLATE utf8_unicode_ci NOT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;

ALTER TABLE `psAdmin`
  ADD PRIMARY KEY (`id_admin`);

ALTER TABLE `psAdminDetails`
  ADD PRIMARY KEY (`id_admin_details`);

ALTER TABLE `psAdminLoginAttempts`
  ADD PRIMARY KEY (`id_admin_login_attempts`);

ALTER TABLE `psAdminLoginHistory`
  ADD PRIMARY KEY (`id_admin_history`);

ALTER TABLE `psCompany`
  ADD PRIMARY KEY (`id_company`);

ALTER TABLE `psProvincial`
  ADD PRIMARY KEY (`provincial_id`);

ALTER TABLE `psAdmin`
  MODIFY `id_admin` INT(10) UNSIGNED NOT NULL AUTO_INCREMENT;

ALTER TABLE `psAdminDetails`
  MODIFY `id_admin_details` INT(10) UNSIGNED NOT NULL AUTO_INCREMENT;

ALTER TABLE `psAdminLoginAttempts`
  MODIFY `id_admin_login_attempts` INT(10) UNSIGNED NOT NULL AUTO_INCREMENT;

ALTER TABLE `psAdminLoginHistory`
  MODIFY `id_admin_history` INT(10) UNSIGNED NOT NULL AUTO_INCREMENT;

ALTER TABLE `psCompany`
  MODIFY `id_company` INT(10) UNSIGNED NOT NULL AUTO_INCREMENT;

ALTER TABLE `psProvincial`
  MODIFY `provincial_id` INT(10) UNSIGNED NOT NULL AUTO_INCREMENT;
COMMIT;

表格有以下功能：

psAdmin - 管理员登录表 psAdminDetails - 详细管理员的数据表 psAdminLoginAttempts - 具有管理员登录尝试的表 psAdminLoginHistory - 包含管理员登录历史记录的表 psCompany - 公司数据库。公司可以无限多。您可以为每个公司分配管理员 psProvincial - 省

合并是有意义的：

psAdminLoginAttempts.id_admin = psAdmin.id_admin
psAdminLoginHistory.id_admin = psAdmin.id_admin
psAdmin.company_id = psCompany.id_company
psAdminDetails.id_admin = psAdmin.id_admin
psAdminDetails.provincial_id = psAdmin.id_admin
psAdminLoginAttempts.id_admin = psAdmin.id_admin
psAdminLoginHistory.id_admin = psAdmin.id_admin

您会添加更多键（例如外键）吗？如果有，在哪里？

Answer 1

我会在所有主要的选择命令上运行 EXPLAIN SELECT，然后添加索引 如果还没有，默认情况下，我会索引任何定义为键的字段或任何“标签”字段，例如我将分组的字段

我也会小心索引 VARCHARS，我会使用它们的并行 INT 值 - company_id 而不是 company_name。注意不要把它作为外键保存

我的默认索引：

ALTER TABLE psAdmin ADD KEY company_id (company_id);
ALTER TABLE psAdmin ADD KEY username (username);

ALTER TABLE psAdminDetails ADD KEY id_admin (id_admin);
ALTER TABLE psAdminDetails ADD KEY country_id (country_id);
ALTER TABLE psAdminDetails ADD KEY provincial_id (provincial_id);

ALTER TABLE psAdminLoginAttempts ADD KEY id_admin (id_admin);

ALTER TABLE psAdminLoginHistory ADD KEY id_admin (id_admin);

ALTER TABLE psAdminLoginHistory ADD KEY country_id (country_id);