环境中已经安装mysql8,自行开启服务(systemctl start mysqld),创建库(automat)、表加载数据,计算全量数据,分析全年单月的月订单金额,结果存入视图table1/root/mysql
时间: 2024-03-24 11:39:11 浏览: 64
好的,以下是具体操作步骤:
1. 开启 MySQL 服务,您已经做过了,使用 `systemctl start mysqld` 命令。
2. 登录 MySQL,可以使用以下命令:
```
mysql -u root -p
```
然后输入您的 MySQL root 用户密码以登录。
3. 创建一个名为 `automat` 的数据库:
```
CREATE DATABASE automat;
```
4. 选择数据库:
```
USE automat;
```
5. 创建一个名为 `orders` 的表,并且定义表结构:
```
CREATE TABLE orders (
id INT PRIMARY KEY AUTO_INCREMENT,
order_date DATE NOT NULL,
amount DECIMAL(10, 2) NOT NULL
);
```
6. 加载数据到表中,假设您的 CSV 文件路径为 `/new/mysql/orders.csv`:
```
LOAD DATA INFILE '/new/mysql/orders.csv'
INTO TABLE orders
FIELDS TERMINATED BY ','
LINES TERMINATED BY '\n'
IGNORE 1 ROWS;
```
7. 计算全量数据并将结果存入名为 `table1` 的视图中:
```
CREATE VIEW table1 AS
SELECT SUM(amount) AS total_amount,
YEAR(order_date) AS year,
MONTH(order_date) AS month
FROM orders
GROUP BY YEAR(order_date), MONTH(order_date);
```
8. 分析全年单月的月订单金额并将结果存入名为 `table2` 的视图中:
```
CREATE VIEW table2 AS
SELECT SUM(amount) AS monthly_amount,
YEAR(order_date) AS year,
MONTH(order_date) AS month
FROM orders
GROUP BY YEAR(order_date), MONTH(order_date);
```
9. 将结果导出到 CSV 文件中,假设您的导出路径为 `/root/mysql/result.csv`:
```
SELECT * INTO OUTFILE '/root/mysql/result.csv'
FIELDS TERMINATED BY ','
LINES TERMINATED BY '\n'
FROM table2;
```
以上就是您需要完成的操作,希望对您有帮助!
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