存储数据

将 SQL 应用于真实问题

Dmitriy (Dima) Gorenshteyn

Lead Data Scientist, Memorial Sloan Kettering Cancer Center

三种数据存储方式

address 表的列

1) 创建新表

CREATE TABLE zip_distance (
    postal_code INT,
    distance FLOAT
);

2) 向表插入数据

INSERT INTO zip_distance (postal_code, distance)
VALUES
(53182, 3.4),                
(15540, 10.2),                
(67912, 1.9);


SELECT film_id, title
FROM film
WHERE rating = 'G';

CREATE TABLE family_films AS
SELECT film_id, title
FROM film
WHERE rating = 'G';

CREATE VIEW family_films AS
SELECT film_id, title
FROM film
WHERE rating = 'G';

将 SQL 应用于真实问题