thinkphp5创建数据库

    public function ceshic(){
        $sql = <<<sql
        CREATE TABLE IF NOT EXISTS `think_data`(
        `id` int(8) unsigned NOT NULL AUTO_INCREMENT,
        `data` varchar(255) NOT NULL,
          PRIMARY KEY (`id`)
        ) 
        ENGINE=MyISAM
        DEFAULT CHARACTER SET=utf8 COLLATE=utf8_general_ci
        CHECKSUM=0
        ROW_FORMAT=DYNAMIC
        DELAY_KEY_WRITE=0
        ;
sql;  
        Db::execute($sql);
    }