---
id: sql-max
title: "SQL Max"
category: "Database"
status: "draft"
verification_status: "conceptual"
canonical_id: ""
aliases: ["SQL MAX() Function", "MAX function", "SQL 최댓값"]
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", "max", "aggregate"]
raw_sources: ["https://www.w3schools.com/sql/sql_max.asp"]
applied_in: []
github_commit: ""
---

# [[SQL Max]]

## 🎯 한 줄 통찰 (One-line insight)
MAX() returns the largest value in a column across numeric, string, or date types, mirroring MIN() in syntax and usage. [S1]

## 🧠 핵심 개념 (Core concepts)
- **MAX() function** — returns the largest value of the selected column; works with numeric, string, and date data types. [S1]
- **Syntax** — `SELECT MAX(column_name) FROM table_name WHERE condition;`. [S1]
- **Unnamed result** — needs an `AS` alias to name the returned column. [S1]
- **MAX() with GROUP BY** — returns the largest value per group. [S1]

## 📖 세부 내용 (Details)
- Highest price: `SELECT MAX(Price) FROM Products;`. [S1]
- With alias: `SELECT MAX(Price) AS HighestPrice FROM Products;`. [S1]
- On a date column: `SELECT MAX(BirthDate) AS LatestBirthdate FROM Employees;`. [S1]
- With GROUP BY: `SELECT MAX(Price) AS HighestPrice, 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 — MIN()과 짝을 이뤄 범위(최소~최대) 리포트에 자주 함께 쓰인다. [S1]

## 💻 코드 패턴 (Code patterns)
MAX with alias and GROUP BY (SQL):
```sql
SELECT MAX(Price) AS HighestPrice, 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 Min]], [[SQL Group By]]
- **참조 맥락:** 최댓값 조회가 필요한 모든 리포트의 기본 함수 — MIN()과 대칭 관계.

## 📚 출처 (Sources)
- [S1] W3Schools — SQL MAX() Function — https://www.w3schools.com/sql/sql_max.asp

## 📝 변경 이력 (Change history)
- 2026-07-04: Initial draft synthesized from the W3Schools "SQL MAX() Function" page (Astra wiki-curation, P-Reinforce v3.1 format).