Analyzing hits dataset With Databend on Object Storage

Analyzing hits datasets on S3 with Databend step by step.

Step 1. Deploy Databend

Make sure you have installed Databend, if not please see:

• How to Deploy Databend

Step 2. Load hits Datasets

2.1 Create a Databend User

Connect to Databend server with MySQL client:

mysql -h127.0.0.1 -uroot -P3307 

Create a user:

CREATE USER user1 IDENTIFIED BY 'abc123';

Grant privileges for the user:

GRANT ALL ON *.* TO user1;

See also How To Create User.

2.2 Create hits Table

Create SQL

2.3 Load Data Into hits Table

hits_1m.tsv.gz

wget --no-check-certificate https://repo.databend.rs/hits/hits_1m.tsv.gz
## If you want to load full version of hits dataset, please download from clickhouse's dataset:
##  wget --continue 'https://datasets.clickhouse.com/hits_compatible/hits.tsv.gz'
gzip -d hits_1m.csv.gz

Load CSV files into Databend

curl -H "insert_sql:insert into hits format TSV"  -F  "upload=@./hits_1m.tsv"  -XPUT http://user1:abc123@127.0.0.1:8081/v1/streaming_load

Step 3. Queries

Execute Queries:

mysql -h127.0.0.1 -P3307 -uroot

SELECT SUM(AdvEngineID), COUNT(*), AVG(ResolutionWidth) FROM hits;

Example Queries:

Number	Query
Q1	SELECT COUNT(*) FROM hits;
Q2	SELECT COUNT(*) FROM hits WHERE AdvEngineID <> 0;
Q3	SELECT SUM(AdvEngineID), COUNT(*), AVG(ResolutionWidth) FROM hits;
Q4	SELECT AVG(UserID) FROM hits;
Q5	SELECT COUNT(DISTINCT UserID) FROM hits;
Q6	SELECT COUNT(DISTINCT SearchPhrase) FROM hits;
Q7	SELECT MIN(EventDate), MAX(EventDate) FROM hits;
Q8	SELECT AdvEngineID, COUNT(*) FROM hits WHERE AdvEngineID <> 0 GROUP BY AdvEngineID ORDER BY COUNT(*) DESC;
Q9	SELECT RegionID, COUNT(DISTINCT UserID) AS u FROM hits GROUP BY RegionID ORDER BY u DESC LIMIT 10;
Q10	SELECT RegionID, SUM(AdvEngineID), COUNT(*) AS c, AVG(ResolutionWidth), COUNT(DISTINCT UserID) FROM hits GROUP BY RegionID ORDER BY c DESC LIMIT 10;