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Teaching SQL to non engineersTech Talk Tokyo #3 Kohei Kikuchi
Kohei Kikuchi
Data Analysis / Recommendation / Data Visualization & ReportingUsing R / SQL etc.
RareJob, Inc. Data Scientist
Circumstance
Planner
Marketer
CS
Circumstance -‐‑‒ Problem
Planner
Marketer
CS
Data please!Data please!
Data please!
To be…
Planner
Marketer
CS
Select.. From..Select.. From..
Select.. From..
What did we do?
SQL Honki-‐‑‒JukuHonki (本気) = seriousJuku(塾) = class
Study
Exercise Practice
Curriculum
Week Content # of Home Work
1 select/from/where/limit/count()/sum() 5
2 order by/group by/between/concat()/as 5
3 indent/as/join 5
4 comment/in/having/case/like/group_concat() 5
5 sub query/unix Dme/bit operaDon 5
6 index/data warehouse 5
Home Work exampleQ. Count # of new paying students by day. (Jan.1 to 10, 2016)
A. select date, count(*) from xxx where date between ‘2016-‐01-‐01’ and ‘2016-‐01-‐10’ group by date
Curriculum
Week Content # of Home Work
1 select/from/where/limit/count()/sum() 5
2 order by/group by/between/concat()/as 5
3 indent/as/join 5
4 comment/in/having/case/like/group_concat() 5
5 sub query/unix Dme/bit operaDon 5
6 index/data warehouse 5
Not following chapter orderof SQL introduction books.
1. create database2. create table3. insert4. update5. delete
Specialize to data extraction and analysis of RareJob DB.
We need
-‐‑‒ Unix time-‐‑‒ Bit operation-‐‑‒ Data warehouse …
Using real data
-‐‑‒ They could understand data definition immediately-‐‑‒ They got interested in the data
* Individual data is masked
Typical data = Boring… Real data = Fun!
9 staffs joined
Planner (3)
Marketer (2)
Accountant (1)
CS (2)
Sales (1)
Result
・Learners acquired much faster than I expected(Not having engineering skill, but have strong motivation to see data)
・They felt very excited “This is my first programming!” “I didnʼ’t know how database looks like until now.”
Result
Begin to extract data in everyday work
written by a planner
Great!
Thank you :)
