mysql小白系列_04 datablock

1.为什么创建一个InnoDB表只分配了96K而不是1M？

2.解析第2行记录格式？(用下面的表定义和数据做测试)

mysql> create table gyj_t3 (id int,name1 varchar(10),name2 varchar(10),name3 varchar(10),name4 varchar(10),name5 varchar(10));
Query OK, 0 rows affected (0.11 sec)

mysql> insert into gyj_t3 (id,name1,name2,name3,name4) values(1,'A','BB','CCC','DDDD');
Query OK, 1 row affected (0.03 sec)

mysql> insert into gyj_t3 values(3,'aaaaaaaaaa','bbbbbbbbbb','ccccc','dddddd','e');
Query OK, 1 row affected (0.06 sec)

mysql> commit;
Query OK, 0 rows affected (0.00 sec)

mysql> insert into gyj_t3 values(4,'aaaaaaaaaa','bbbbbbbbbb',null,'dddddd','e');
Query OK, 1 row affected (0.05 sec)

mysql> commit;
Query OK, 0 rows affected (0.00 sec)

mysql> SELECT * FROM gyj_t3;
+------+------------+------------+-------+--------+-------+
| id   | name1      | name2      | name3 | name4  | name5 |
+------+------------+------------+-------+--------+-------+
|    1 | A          | BB         | CCC   | DDDD   | NULL  |
|    1 | aaaaaaaaaa | bbbbbbbbbb | ccccc |        | NULL  |
|    3 | aaaaaaaaaa | bbbbbbbbbb | ccccc | dddddd | e     |
|    4 | aaaaaaaaaa | bbbbbbbbbb | NULL  | dddddd | e     |
+------+------------+------------+-------+--------+-------+

数据