docs(10_Wiki): Dev 폴더 누락분 반영 — Topic_Programming으로 통합

이전 재구성 작업에서 Dev/ 폴더가 누락되었던 것을 반영.

- Dev/Topic_Programming(중첩 폴더, 78개)은 Dev 자체 최상위 폴더들
  (Architecture/Conventions/Engineering_Intelligence 등)과 완전 중복이라 제거.
- Dev 최상위 엔지니어링 지식 폴더(Architecture/Conventions/Engineering_Intelligence/
  Failure_Library/Generalized_Principles/Language/Pattern_Catalog/Platform_Guides/
  Subsystems, 77개)는 이미 Topic_Programming/Topic_Programming에 더 최신 버전이
  존재해 중복 제거(고유 콘텐츠 1개는 예외 처리하여 이동 보존).
- Dev의 W3Schools 언어 튜토리얼 폴더(Topic_C/CPP/CSS/CSharp/HOWTO/HTML/Java/
  JavaScript/PHP/Python/SQL/W3CSS, 1201개)는 전부 Topic_Programming 하위로 이동.
- 에이전트 운영 상태(.astra/docs)는 그대로 유지, 콘텐츠 폴더만 정리.
- Topic_Programming 최종 문서 수: 2784 → 3985.
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---
id: sql-min
title: "SQL Min"
category: "Database"
status: "draft"
verification_status: "conceptual"
canonical_id: ""
aliases: ["SQL MIN() Function", "MIN function", "SQL 최솟값"]
duplicate_of: ""
source_trust_level: "B"
confidence_score: 0.9
created_at: 2026-07-04
updated_at: 2026-07-04
review_reason: ""
merge_history: []
tags: ["sql", "database", "w3schools", "min", "aggregate"]
raw_sources: ["https://www.w3schools.com/sql/sql_min_max.asp"]
applied_in: []
github_commit: ""
---
# [[SQL Min]]
## 🎯 한 줄 통찰 (One-line insight)
MIN() returns the smallest value in a column across numeric, string, or date types, and its unnamed result column typically needs an alias. [S1]
## 🧠 핵심 개념 (Core concepts)
- **MIN() function** — returns the smallest value of the selected column; works with numeric, string, and date data types. [S1]
- **Syntax** — `SELECT MIN(column_name) FROM table_name WHERE condition;`. [S1]
- **Unnamed result** — MIN()'s returned column has no name by default; use `AS` to give it a descriptive alias. [S1]
- **MIN() with GROUP BY** — returns the smallest value per group, e.g. lowest price per category. [S1]
## 📖 세부 내용 (Details)
- Lowest price: `SELECT MIN(Price) FROM Products;`. [S1]
- With alias: `SELECT MIN(Price) AS SmallestPrice FROM Products;`. [S1]
- On a date column: `SELECT MIN(BirthDate) AS EarliestBirthdate FROM Employees;`. [S1]
- With GROUP BY: `SELECT MIN(Price) AS SmallestPrice, CategoryID FROM Products GROUP BY CategoryID;`. [S1]
## ⚖️ 모순 및 업데이트 (Contradictions & updates)
소스에서 모순되는 정보는 발견되지 않음.
## 🛠️ 적용 사례 (Applied in summary)
현재 발견된 실제 적용 사례가 없습니다 — MAX()와 짝을 이뤄 범위(최소~최대) 리포트에 자주 함께 쓰인다. [S1]
## 💻 코드 패턴 (Code patterns)
MIN with alias and GROUP BY (SQL):
```sql
SELECT MIN(Price) AS SmallestPrice, CategoryID
FROM Products
GROUP BY CategoryID;
```
## ✅ 검증 상태 및 신뢰도
- **상태:** draft
- **검증 단계:** conceptual
- **출처 신뢰도:** B (W3Schools — widely used educational reference, not a primary standards body)
- **신뢰 점수:** 0.90
- **중복 검사 결과:** 신규 생성 (New discovery)
## 🔗 지식 그래프 (Knowledge Graph)
- **상위/루트:** [[SQL Tutorial]]
- **관련 개념:** [[SQL Aggregate Functions]], [[SQL Max]], [[SQL Group By]]
- **참조 맥락:** 최솟값 조회가 필요한 모든 리포트의 기본 함수 — MAX()와 대칭 관계.
## 📚 출처 (Sources)
- [S1] W3Schools — SQL MIN() Function — https://www.w3schools.com/sql/sql_min_max.asp
## 📝 변경 이력 (Change history)
- 2026-07-04: Initial draft synthesized from the W3Schools "SQL MIN() Function" page (Astra wiki-curation, P-Reinforce v3.1 format).