填充列式数据库

NoSQL 入门

Jake Roach

Data Engineer

填充行式 vs. 列式数据库

行式：

列式：

分析型数据库每日更新。

Snowflake 数据仓库及其分层存储对象示意图。

CREATE TABLE books (
    title VARCHAR(100),
    author VARCHAR(100),
    price FLOAT
);

COPY INTO books
FROM 'file://data_science_books.csv'
FILE_FORMAT = (
    TYPE = 'CSV'
    FIELD_DELIMITER = ','
    SKIP_HEADER = 1
);

COPY INTO

FROM

FILE_FORMAT

¹ https://docs.snowflake.com/en/sql-reference/sql/copy-into-table

CREATE TABLE premium_books AS
SELECT *
FROM books
WHERE price > 50.00;

CREATE OR REPLACE TABLE premium_books AS
SELECT *
FROM books
WHERE price > 50.00;

CREATE TABLE ... AS

SELECT ...

OR REPLACE

¹ https://docs.snowflake.com/en/sql-reference/sql/create-table

NoSQL 入门