2nd/10_Wiki/Dev/Topic_Python/Python_MySQL_Insert.md

id, title, category, status, verification_status, canonical_id, aliases, duplicate_of, source_trust_level, confidence_score, created_at, updated_at, review_reason, merge_history, tags, raw_sources, applied_in, github_commit

id	title	category	status	verification_status	canonical_id	aliases	duplicate_of	source_trust_level	confidence_score	created_at	updated_at	review_reason	merge_history	tags	raw_sources	applied_in	github_commit
python-mysql-insert	Python MySQL Insert	Programming_Language	draft	conceptual		executemany() lastrowid 파이썬 MySQL 삽입		B	0.9	2026-07-04	2026-07-04			python mysql w3schools insert commit	https://www.w3schools.com/python/python_mysql_insert.asp

Python MySQL Insert

🎯 한 줄 통찰 (One-line insight)

mydb.commit() is not optional — without it, INSERT/executemany() changes silently never reach the table, since the connector buffers writes until explicitly committed. [S1]

🧠 핵심 개념 (Core concepts)

• %s placeholders — sql = "INSERT INTO customers (name, address) VALUES (%s, %s)" — parameterized, injection-safe insertion. [S1]
• mycursor.execute(sql, val) — executes with a tuple of values bound to the placeholders. [S1]
• mydb.commit() — REQUIRED to persist changes; without it, no changes are made to the table. [S1]
• mycursor.rowcount — number of rows affected by the last statement. [S1]
• executemany(sql, val) — inserts multiple rows at once; val is a list of tuples. [S1]
• mycursor.lastrowid — the auto-generated ID of the last inserted row (only the LAST row's ID if multiple were inserted). [S1]

🧩 추출된 패턴 (Extracted patterns)

• commit() is the universal write-finalizer — every mutating operation (INSERT/UPDATE/DELETE) in this whole Python-MySQL series requires the same mydb.commit() call, making it the single most important line to remember across all of them. [S1]

📖 세부 내용 (Details)

• Single insert with commit: sql = "INSERT INTO customers (name, address) VALUES (%s, %s)"; val = ("John", "Highway 21"); mycursor.execute(sql, val); mydb.commit(); print(mycursor.rowcount, "record inserted."). [S1]
• Multiple rows: val = [('Peter','Lowstreet 4'), ...]; mycursor.executemany(sql, val); mydb.commit(). [S1]
• Get last inserted ID: print("1 record inserted, ID:", mycursor.lastrowid). [S1]

⚖️ 모순 및 업데이트 (Contradictions & updates)

소스에서 모순되는 정보는 발견되지 않음. commit()이 없으면 아무 변경도 반영되지 않는다는 점이 "Important!"로 강조됨. [S1]

🛠️ 적용 사례 (Applied in summary)

현재 발견된 실제 적용 사례가 없습니다 — SQL Injection/Parameters 챕터에서 배운 파라미터화 쿼리(%s)가 여기서 mysql.connector의 실제 구현으로 이어진다. [S1]

💻 코드 패턴 (Code patterns)

Insert with required commit() (Python):

sql = "INSERT INTO customers (name, address) VALUES (%s, %s)"
val = ("John", "Highway 21")
mycursor.execute(sql, val)
mydb.commit()  # required, or no changes persist
print(mycursor.rowcount, "record inserted.")

✅ 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: Python Tutorial
• 관련 개념: Python MySQL Create Table, SQL Parameters, Python MySQL Update
• 참조 맥락: commit()이 필요한 모든 쓰기 작업(Insert/Update/Delete)의 공통 패턴 확립.

📚 출처 (Sources)

• [S1] W3Schools — Python MySQL Insert Into Table — https://www.w3schools.com/python/python_mysql_insert.asp

📝 변경 이력 (Change history)

• 2026-07-04: Initial draft synthesized from the W3Schools "Python MySQL Insert Into Table" page (Astra wiki-curation, P-Reinforce v3.1 format).