fly6516
2912a4f86a
- 新增 App.java 和 AppTest.java 文件作为项目示例 - 添加 command.md、origin.md 和 sql.md 文件，包含项目相关命令和 SQL 语句 - 创建 pom.xml 文件定义项目依赖
43 lines
788 B
Markdown
43 lines
788 B
Markdown
DROP TABLE IF EXISTS ratings;
|
|
DROP TABLE IF EXISTS movies;
|
|
DROP TABLE IF EXISTS users;
|
|
|
|
CREATE EXTERNAL TABLE users (
|
|
UserID BIGINT,
|
|
Gender STRING,
|
|
Age INT,
|
|
Occupation STRING,
|
|
Zipcode STRING
|
|
)
|
|
ROW FORMAT DELIMITED
|
|
FIELDS TERMINATED BY ','
|
|
STORED AS TEXTFILE
|
|
LOCATION '/user/hadoop/movie_data/users';
|
|
|
|
|
|
CREATE EXTERNAL TABLE movies (
|
|
MovieID BIGINT,
|
|
Title STRING,
|
|
Genres STRING
|
|
)
|
|
ROW FORMAT DELIMITED
|
|
FIELDS TERMINATED BY ','
|
|
STORED AS TEXTFILE
|
|
LOCATION '/user/hadoop/movie_data/movies';
|
|
|
|
|
|
CREATE EXTERNAL TABLE ratings (
|
|
UserID BIGINT,
|
|
MovieID BIGINT,
|
|
Rating DOUBLE,
|
|
Timestamped STRING
|
|
)
|
|
ROW FORMAT DELIMITED
|
|
FIELDS TERMINATED BY ','
|
|
STORED AS TEXTFILE
|
|
LOCATION '/user/hadoop/movie_data/ratings';
|
|
|
|
SELECT * FROM users LIMIT 5;
|
|
SELECT * FROM movies LIMIT 5;
|
|
SELECT * FROM ratings LIMIT 5;
|