refactor(topics): 멀티 에이전트용 지식 재편 — _Common(공통 기본기) + Domain_* 구조

에이전트 8종(대화형/프로그래머 C·S/디자이너/설계자/기획자/QA/PD/PM)에게
[공통 기본 능력 + 롤별 Specialty] 2층으로 지식을 주입하기 위한 재분류.
문서 내용·포맷은 무수정, 폴더 이동만 (6,372개 문서 수 보존 확인).

- Topic_Programming → Domain_Programming (내부 구조 보존)
- Topic_Graphic → Domain_Design
- Topic_Business → Domain_Product
- Topic_General → Domain_General
- _Common 신설: Math(구 Topic_Math_Specialty), Reasoning(구 General/From_Thinking & Reasoning),
  Reasoning_Creativity(구 General/From_창의성), Communication(Poetic_Blog_Writing + From_writing)
- 타 도메인의 From_* 폴더는 유지 (출처 표기일 뿐, 이미 도메인에 맞게 분류된 문서)
- 빈 폴더 정리 (memory/procedures)
- 에이전트→폴더 매핑은 workspace의 .astra/agent-knowledge-map.json (9개 에이전트)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

10_Wiki/Topics/Domain_Programming/Topic_SQL/SQL_Comments.md

@@ -0,0 +1,81 @@
+---
+id: sql-comments
+title: "SQL Comments"
+category: "Database"
+status: "draft"
+verification_status: "conceptual"
+canonical_id: ""
+aliases: ["SQL comment syntax", "SQL 주석"]
+duplicate_of: ""
+source_trust_level: "B"
+confidence_score: 0.88
+created_at: 2026-07-04
+updated_at: 2026-07-04
+review_reason: ""
+merge_history: []
+tags: ["sql", "database", "w3schools", "comments"]
+raw_sources: ["https://www.w3schools.com/sql/sql_comments.asp"]
+applied_in: []
+github_commit: ""
+---
+
+# [[SQL Comments]]
+
+## 🎯 한 줄 통찰 (One-line insight)
+SQL supports single-line (`--`) and multi-line (`/* */`) comments, ignored by the database engine, useful both for documentation and for temporarily disabling parts of a statement — except in Microsoft Access, which supports neither. [S1]
+
+## 🧠 핵심 개념 (Core concepts)
+- **Purpose** — explain SQL code, or temporarily prevent execution of code (for debugging); comments are ignored by the database engine. [S1]
+- **Single-line comments** — start with `--` and continue to the end of the line. [S1]
+- **Multi-line comments** — start with `/*` and end with `*/`; any text between is ignored. [S1]
+- **MS Access exception** — comments are not supported in Microsoft Access databases. [S1]
+
+## 🧩 추출된 패턴 (Extracted patterns)
+- **Comment-out-to-disable** — appending `--` or wrapping in `/* */` is used not just for documentation but as a quick way to disable a clause, a whole statement, or several statements at once without deleting code. [S1]
+- **Inline partial comment** — a multi-line comment can mask just part of a line/statement (e.g. commenting out one column or one OR-branch) while the rest still executes. [S1]
+
+## 📖 세부 내용 (Details)
+- Single-line as explanation: `-- Selects all German customers` followed by the query. [S1]
+- Single-line to comment out the end of a line: `SELECT * FROM Customers -- WHERE City='Berlin';`. [S1]
+- Single-line to disable an entire statement: `-- SELECT * FROM Customers;` followed by a different active statement. [S1]
+- Multi-line as explanation: `/* Selects all German customers from Berlin */` followed by the query. [S1]
+- Multi-line to disable several statements at once. [S1]
+- Multi-line to mask part of a column list: `SELECT CustomerName, /*City,*/ Country FROM Customers;`. [S1]
+- Multi-line to mask part of an OR chain inside a WHERE clause. [S1]
+
+## ⚖️ 모순 및 업데이트 (Contradictions & updates)
+- **MS Access는 주석을 지원하지 않음** — 다른 모든 SQL 방언과 다른 예외 사항으로 소스에 명시됨. [S1]
+
+## 🛠️ 적용 사례 (Applied in summary)
+현재 발견된 실제 적용 사례가 없습니다 — 디버깅 중 쿼리 일부를 임시로 비활성화하는 용도로 실무에서 흔히 쓰인다. [S1]
+
+## 💻 코드 패턴 (Code patterns)
+Single-line and multi-line comments (SQL):
+```sql
+-- Selects all German customers
+SELECT * FROM Customers
+WHERE Country = 'Germany';
+
+/* Selects all German customers
+   from Berlin */
+SELECT * FROM Customers
+WHERE Country = 'Germany' AND City = 'Berlin';
+```
+
+## ✅ 검증 상태 및 신뢰도
+- **상태:** draft
+- **검증 단계:** conceptual
+- **출처 신뢰도:** B (W3Schools — widely used educational reference, not a primary standards body)
+- **신뢰 점수:** 0.88
+- **중복 검사 결과:** 신규 생성 (New discovery)
+
+## 🔗 지식 그래프 (Knowledge Graph)
+- **상위/루트:** [[SQL Tutorial]]
+- **관련 개념:** [[SQL Syntax]]
+- **참조 맥락:** SQL 코드 문서화 및 디버깅 시 쿼리 일부를 비활성화할 때 사용 — MS Access에서는 지원되지 않음에 유의.
+
+## 📚 출처 (Sources)
+- [S1] W3Schools — SQL Comments — https://www.w3schools.com/sql/sql_comments.asp
+
+## 📝 변경 이력 (Change history)
+- 2026-07-04: Initial draft synthesized from the W3Schools "SQL Comments" page (Astra wiki-curation, P-Reinforce v3.1 format).