mysql> show variables like '%innodb_page_size%'; +------------------+-------+ | Variable_name | Value | +------------------+-------+ | innodb_page_size | 16384 | +------------------+-------+ 1 row in set (0.00 sec) 我們平時是以記錄為單位來向表中插入數據的，這些記錄在磁盤上的存放方式也被稱為行格式或者記錄格式。InnoDB存儲引擎設計了4種不同類型的行格式，分別是Compact、Redundant、Dynamic和Compressed行格式。
mysql> show variables like "innodb_file_format"; +--------------------+-----------+ | Variable_name | Value | +--------------------+-----------+ | innodb_file_format | Barracuda | +--------------------+-----------+ 1 row in set (0.01 sec)
mysql> show variables like "innodb_default_row_format"; +---------------------------+---------+ | Variable_name | Value | +---------------------------+---------+ | innodb_default_row_format | dynamic | +---------------------------+---------+ 1 row in set (0.00 sec) 查看當前表使用的行格式：
mysql> show table status like 'dept_emp'/G*************************** 1. row *************************** Name: dept_emp Engine: InnoDB Version: 10 Row_format: Dynamic Rows: 331570 Avg_row_length: 36 Data_length: 12075008Max_data_length: 0 Index_length: 5783552 Data_free: 0 Auto_increment: NULL Create_time: 2021-08-11 09:04:36 Update_time: NULL Check_time: NULL Collation: latin1_swedish_ci Checksum: NULL Create_options: Comment:1 row in set (0.00 sec) 指定表的行格式：
