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title

SQL Backup DB

🎯 한 줄 통찰 (One-line insight)

BACKUP DATABASE (SQL Server) creates a full backup to disk, and WITH DIFFERENTIAL creates a faster, smaller backup capturing only changes since the last full backup. [S1]

🧠 핵심 개념 (Core concepts)

BACKUP DATABASE statement — creates a full backup of an existing SQL Server database. [S1]
Syntax — BACKUP DATABASE databasename TO DISK = 'filepath';. [S1]
BACKUP WITH DIFFERENTIAL — captures only data changed since the last full backup; requires at least one prior full backup. [S1]
Syntax (differential) — BACKUP DATABASE databasename TO DISK = 'filepath' WITH DIFFERENTIAL;. [S1]

🧩 추출된 패턴 (Extracted patterns)

Store backups on a different drive — placing the backup on a separate drive from the original database protects against losing both to the same disk failure. [S1]
Full-then-differential strategy — a differential backup reduces backup time by only capturing changes, but depends on a prior full backup existing. [S1]

📖 세부 내용 (Details)

Full backup: BACKUP DATABASE testDB TO DISK = 'D:\backups\testDB.bak';. [S1]
Differential backup: BACKUP DATABASE testDB TO DISK = 'D:\backups\testDB.bak' WITH DIFFERENTIAL;. [S1]

⚖️ 모순 및 업데이트 (Contradictions & updates)

소스에서 모순되는 정보는 발견되지 않음.

🛠️ 적용 사례 (Applied in summary)

현재 발견된 실제 적용 사례가 없습니다 — DROP DATABASE 같은 되돌릴 수 없는 작업 전에 선행되어야 하는 안전장치다. [S1]

💻 코드 패턴 (Code patterns)

Full and differential backup (SQL Server):

BACKUP DATABASE testDB
TO DISK = 'D:\backups\testDB.bak';

BACKUP DATABASE testDB
TO DISK = 'D:\backups\testDB.bak'
WITH DIFFERENTIAL;

✅ 검증 상태 및 신뢰도

상태: draft
검증 단계: conceptual
출처 신뢰도: B (W3Schools — widely used educational reference, not a primary standards body)
신뢰 점수: 0.87
중복 검사 결과: 신규 생성 (New discovery)

🔗 지식 그래프 (Knowledge Graph)

상위/루트: SQL Tutorial
관련 개념: SQL Create DB, SQL Drop DB
참조 맥락: 데이터베이스 삭제/변경 등 위험한 작업 이전에 항상 선행되어야 할 안전장치.

📚 출처 (Sources)

[S1] W3Schools — SQL BACKUP DATABASE Statement — https://www.w3schools.com/sql/sql_backup_db.asp

📝 변경 이력 (Change history)

2026-07-04: Initial draft synthesized from the W3Schools "SQL BACKUP DATABASE Statement" page (Astra wiki-curation, P-Reinforce v3.1 format).

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