1.创建新的数据库test,以便创建表和设置数据类型。
2.在新的test数据库创建一个名为integers的表,其中包含一个名为n的列,然后向列中添加数据值5.
3.用select语句确认integers表存在并包含指定的值。
4.显示integers表的表状态并记录数据类型值得数据长度。
1.
mysql> create database test;
Query OK, 1 row affected (0.00 sec)
2.
mysql> create table integers (n smallint unsigned);
Query OK, 0 rows affected (0.06 sec)
mysql> insert into integers values(5);
Query OK, 1 row affected (0.02 sec)
3.
mysql> select * from integers;
+------+
| n |
+------+
| 5 |
+------+
1 row in set (0.00 sec)
4.
mysql> show table status like 'integers'G
*************************** 1. row ***************************
Name: integers
Engine: InnoDB
Version: 10
Row_format: Compact
Rows: 1
Avg_row_length: 16384
Data_length: 16384
Max_data_length: 0
Index_length: 0
Data_free: 0
Auto_increment: NULL
Create_time: 2016-11-03 04:01:27
Update_time: NULL
Check_time: NULL
Collation: latin1_swedish_ci
Checksum: NULL
Create_options:
Comment:
1 row in set (0.00 sec)