Question

准备数据

1. 创建数据库

create database stock_db charset=utf8;

2. 选择数据库

use stock_db;

3. 导入数据

stock_db.sql在课件中

source stock_db.sql

4. 表结构如下

mysql> desc focus;
+-----------+------------------+------+-----+---------+----------------+
| Field     | Type             | Null | Key | Default | Extra          |
+-----------+------------------+------+-----+---------+----------------+
| id        | int(10) unsigned | NO   | PRI | NULL    | auto_increment |
| note_info | varchar(200)     | YES  |     |         |                |
| info_id   | int(10) unsigned | YES  | MUL | NULL    |                |
+-----------+------------------+------+-----+---------+----------------+

mysql> desc info;
+----------+------------------+------+-----+---------+----------------+
| Field    | Type             | Null | Key | Default | Extra          |
+----------+------------------+------+-----+---------+----------------+
| id       | int(10) unsigned | NO   | PRI | NULL    | auto_increment |
| code     | varchar(6)       | NO   |     | NULL    |                |
| short    | varchar(10)      | NO   |     | NULL    |                |
| chg      | varchar(10)      | NO   |     | NULL    |                |
| turnover | varchar(255)     | NO   |     | NULL    |                |
| price    | decimal(10,2)    | NO   |     | NULL    |                |
| highs    | decimal(10,2)    | NO   |     | NULL    |                |
| time     | date             | YES  |     | NULL    |                |
+----------+------------------+------+-----+---------+----------------+