填入欄式資料庫

NoSQL 入門

Jake Roach

Data Engineer

列式 vs. 欄式資料庫的填入方式

列式（Row-oriented）：

欄式（Column-oriented）：

每日更新的分析型資料庫。

Snowflake 資料倉儲與其巢狀儲存物件的示意圖。

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 入門