CREATE TABLE IF NOT EXISTS `en_book_word_rl`
(
    `id`          BIGINT PRIMARY KEY AUTO_INCREMENT COMMENT '词书单词关联主键ID',
    `book_id`     BIGINT NOT NULL COMMENT '词书ID，关联 en_book.id',
    `word_id`     BIGINT NOT NULL COMMENT '单词ID，关联 en_word.id',
    `delete_flag` TINYINT(1) DEFAULT 0 COMMENT '删除标志，0-正常，1-删除',
    `create_at`   DATETIME   DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
    `update_at`   DATETIME   DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '更新时间'
) ENGINE = InnoDB
  DEFAULT CHARSET = utf8mb4
  COLLATE = utf8mb4_unicode_ci COMMENT ='词书单词关联表';