Upgrade to Pro — share decks privately, control downloads, hide ads and more …
Sign up for free

RDBのNULLはアンチパターン

Sponsored · Ship Features Fearlessly Turn features on and off without deploys. Used by thousands of Ruby developers. →
Avatar for Ryutaro Ryutaro
September 30, 2024
Programming
140
0

 RDBのNULLはアンチパターン

Avatar for Ryutaro

Ryutaro

September 30, 2024

More Decks by Ryutaro

See All by Ryutaro
Gemini for Google Cloud で出来ること
Avatar for Ryutaro ryutarohoriuchi
0
45

Other Decks in Programming

See All in Programming
AI時代のコードレビューは人に向けるな、仕組みに向けろ
Avatar for meijin texmeijin
5
3.6k
Ghostty + Neovimで作る 透明でカッコ良い開発環境
Avatar for Kanade Nonomura j341nono
0
170
Everything will be SERVERLESS — 信じて運用した10年の経験値 / Everything Will be Serverless — Lessons Learned from 10 Years of Operational Experience
Avatar for shiro seike seike460
PRO
1
990
Domain-Driven Transformation
Avatar for Henning Schwentner hschwentner
2
2.3k
WebRTC映像をAirPlayに対応させる挑戦.pdf
Avatar for monolithic-adam monolithic_adam
0
360
AWS CDKのカスタムリソースでContinuum（旧Security Agent）を実装した話 | Implementing Continuum (formerly Security Agent) via AWS CDK Custom Resource
Avatar for アキキー | Akihisa Ikeda akihisaikeda
2
150
Findy - エンジニア向け会社紹介/Findy Company Deck
Avatar for Findy findyinc
6
400k
Kubernetes祭り #2 OP/ED
Avatar for bells17 bells17
0
110
Herb in Rails 8.2: Your ERB views, now HTML-aware @ Rails World 2026, Austin, Texas
Avatar for Marco Roth marcoroth
0
210
When benchmarks go bad - what I learned from measuring performance wrong
Avatar for Holly Cummins hollycummins
0
200
Augmenting AI with the Power of Jakarta EE
Avatar for ivargrimstad ivargrimstad
0
640
re:Inventに行く前に知っておきたい現地参加のノウハウ
Avatar for nokomoro3 nokomoro3
0
400

Featured

See All Featured
We Are The Robots
Avatar for Honza Javorek honzajavorek
0
400
Cheating the UX When There Is Nothing More to Optimize - PixelPioneers
Avatar for Stéphanie Walter stephaniewalter
287
14k
Utilizing Notion as your number one productivity tool
Avatar for Mfonobong Umondia mfonobong
4
620
Impact Scores and Hybrid Strategies: The future of link building
Avatar for Tamara Novitovic tamaranovitovic
0
460
B2B Lead Gen: Tactics, Traps & Triumph
Avatar for Sophie Logan marketingsoph
1
280
GraphQLの誤解/rethinking-graphql
Avatar for sonatard sonatard
75
12k
How STYLIGHT went responsive
Avatar for nonsquared nonsquared
100
6.3k
Why Your Marketing Sucks and What You Can Do About It - Sophie Logan
Avatar for Sophie Logan marketingsoph
0
430
Bioeconomy Workshop: Dr. Julius Ecuru, Opportunities for a Bioeconomy in West Africa
Avatar for AKADEMIYA2063 akademiya2063
PRO
1
400
Documentation Writing (for coders)
Avatar for Carmen Chung carmenintech
77
5.6k
ReactJS: Keep Simple. Everything can be a component!
Avatar for Pedro Nauck pedronauck
666
130k
The browser strikes back
Avatar for Jono Alderson jonoalderson
0
1.8k

Transcript

  1. None
  2. None
  3. None
  4. None
  5. None
  6. None
  7. None
  8. None
  9. None
  10. None
  11. None
  12. None
  13. None

  14. 結果: Empty set (空が返ってくる )

  15. None
  16. None

  17. 結果: Empty set (空が返ってくる )

  18. None
  19. None
  20. None
  21. None
  22. None
  23. None
  24. None
  25. None
  26. None
  27. None
  28. None
  29. None
  30. None