{"id":121197,"date":"2026-11-02T08:00:44","date_gmt":"2026-11-02T00:00:44","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/121197.html"},"modified":"2026-11-02T08:00:44","modified_gmt":"2026-11-02T00:00:44","slug":"mysql-%e5%a2%9e%e5%88%a0%e6%94%b9%e6%9f%a5%ef%bc%88crud%ef%bc%89%e8%af%a6%e8%a7%a3-python-pymysql%e5%ae%9e%e6%93%8d","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/121197.html","title":{"rendered":"MySQL \u589e\u5220\u6539\u67e5\uff08CRUD\uff09\u8be6\u89e3 + Python pymysql\u5b9e\u64cd"},"content":{"rendered":"

MySQL \u589e\u5220\u6539\u67e5（CRUD）\u8be6\u89e3 + Python pymysql\u5b9e\u64cd<\/h2>\n

\u9002\u914dCSDN Markdown，\u76f4\u63a5\u5168\u9009\u590d\u5236\u7c98\u8d34\u5373\u53ef，\u65e0\u7279\u6b8a\u6837\u5f0f，\u4ee3\u7801\u5757\u3001\u8868\u683c\u6b63\u5e38\u8bc6\u522b<\/p>\n

\u524d\u8a00<\/h3>\n

CRUD \u662f\u6570\u636e\u5e93\u6700\u6838\u5fc3\u7684\u56db\u4e2a\u64cd\u4f5c：\u65b0\u589e（Create）\u3001\u67e5\u8be2（Read）\u3001\u4fee\u6539（Update）\u3001\u5220\u9664（Delete）\u3002\u4e0d\u7ba1\u662f\u540e\u7aef\u5f00\u53d1\u3001\u671f\u672b\u6570\u636e\u5e93\u8003\u8bd5，\u8fd8\u662f\u5199 Python \u9879\u76ee，\u8fd9\u90fd\u662f\u57fa\u672c\u529f\u3002\u5f88\u591a\u65b0\u624b\u5bb9\u6613\u8e29 UPDATE\u3001DELETE \u5fd8\u8bb0 WHERE \u6761\u4ef6\u3001\u5fd8\u8bb0\u4e8b\u52a1\u63d0\u4ea4\u3001SQL \u6ce8\u5165\u8fd9\u4e9b\u5751，\u672c\u6587\u4ece\u539f\u751f SQL \u8bb2\u5230 Python \u4ee3\u7801\u5b9e\u64cd\u3002<\/p>\n

\u73af\u5883\u8bf4\u660e：MySQL 8.0，\u4f7f\u7528 pymysql \u5e93\u3002<\/p>\n

\u4e00\u3001\u51c6\u5907\u6d4b\u8bd5\u8868<\/h3>\n

\u5148\u5efa\u4e00\u5f20\u5b66\u751f\u8868，\u540e\u9762\u6240\u6709 SQL \u90fd\u57fa\u4e8e\u8fd9\u5f20\u8868\u6d4b\u8bd5<\/p>\n

CREATE<\/span> TABLE<\/span> student (<\/span>
\n id INT<\/span> PRIMARY<\/span> KEY<\/span> AUTO_INCREMENT<\/span> COMMENT<\/span> '\u4e3b\u952eid'<\/span>,<\/span>
\n name VARCHAR<\/span>(<\/span>20<\/span>)<\/span> NOT<\/span> NULL<\/span> COMMENT<\/span> '\u59d3\u540d'<\/span>,<\/span>
\n age TINYINT<\/span> COMMENT<\/span> '\u5e74\u9f84'<\/span>,<\/span>
\n score INT<\/span> COMMENT<\/span> '\u5206\u6570'<\/span>,<\/span>
\n is_delete TINYINT<\/span> DEFAULT<\/span> 0<\/span> COMMENT<\/span> '0\u6b63\u5e38 1\u903b\u8f91\u5220\u9664'<\/span>
\n)<\/span> ENGINE<\/span>=<\/span>InnoDB<\/span> DEFAULT<\/span> CHARSET<\/span>=<\/span>utf8mb4;<\/span><\/p>\n

\u4e8c\u3001\u67e5\u8be2 Read（SELECT）<\/h3>\n

\u67e5\u8be2\u662f\u4f7f\u7528\u6700\u591a\u7684\u64cd\u4f5c，\u8bfb\u53d6\u8868\u91cc\u9762\u7684\u6570\u636e\u3002
\n\u57fa\u7840\u8bed\u6cd5：<\/p>\n

— \u67e5\u8be2\u5168\u90e8\u5b57\u6bb5<\/span>
\nSELECT<\/span> *<\/span> FROM<\/span> student;<\/span><\/p>\n

— \u67e5\u8be2\u6307\u5b9a\u5b57\u6bb5（\u63a8\u8350，\u4e0d\u8981\u76f4\u63a5\u7528*）<\/span>
\nSELECT<\/span> id,<\/span>name,<\/span>score FROM<\/span> student;<\/span><\/p>\n

— \u5e26\u6761\u4ef6\u67e5\u8be2<\/span>
\nSELECT<\/span> *<\/span> FROM<\/span> student WHERE<\/span> age >=<\/span> 18<\/span>;<\/span><\/p>\n

— \u6a21\u7cca\u67e5\u8be2<\/span>
\nSELECT<\/span> *<\/span> FROM<\/span> student WHERE<\/span> name LIKE<\/span> '\u5f20%'<\/span>;<\/span><\/p>\n

— \u6392\u5e8f order by<\/span>
\nSELECT<\/span> *<\/span> FROM<\/span> student ORDER<\/span> BY<\/span> score DESC<\/span>;<\/span><\/p>\n

— \u5206\u9875 limit<\/span>
\nSELECT<\/span> *<\/span> FROM<\/span> student LIMIT<\/span> 0<\/span>,<\/span>5<\/span>;<\/span><\/p>\n

— \u5206\u7ec4 + having<\/span>
\nSELECT<\/span> age,<\/span>COUNT<\/span>(<\/span>*<\/span>)<\/span> num FROM<\/span> student GROUP<\/span> BY<\/span> age HAVING<\/span> COUNT<\/span>(<\/span>*<\/span>)<\/span> ><\/span> 1<\/span>;<\/span><\/p>\n

💡 \u8e29\u5751\u70b9：WHERE \u8fc7\u6ee4\u539f\u59cb\u6570\u636e，HAVING \u8fc7\u6ee4\u5206\u7ec4\u4e4b\u540e\u7684\u7ed3\u679c；GROUP BY\u540e\u9762\u7684\u5b57\u6bb5，select\u91cc\u4e00\u822c\u53ea\u80fd\u653e\u5206\u7ec4\u5b57\u6bb5\u548c\u805a\u5408\u51fd\u6570\u3002<\/p>\n

\u4e09\u3001\u65b0\u589e Create（INSERT）<\/h3>\n

\u5f80\u8868\u91cc\u63d2\u5165\u6570\u636e\u636e<\/p>\n

— \u5355\u6761\u63d2\u5165<\/span>
\nINSERT<\/span> INTO<\/span> student(<\/span>name,<\/span>age,<\/span>score)<\/span> VALUES<\/span> (<\/span>'\u5f20\u4e09'<\/span>,<\/span>19<\/span>,<\/span>88<\/span>)<\/span>;<\/span><\/p>\n

— \u6279\u91cf\u63d2\u5165（\u6548\u7387\u66f4\u9ad8）<\/span>
\nINSERT<\/span> INTO<\/span> student(<\/span>name,<\/span>age,<\/span>score)<\/span>
\nVALUES<\/span>
\n(<\/span>'\u674e\u56db'<\/span>,<\/span>20<\/span>,<\/span>76<\/span>)<\/span>,<\/span>
\n(<\/span>'\u738b\u4e94'<\/span>,<\/span>19<\/span>,<\/span>92<\/span>)<\/span>;<\/span>
\n`<\/span>`<\/span>`<\/span>> 💡 \u8e29\u5751\u70b9：\u4e3b\u952e\u8bbe\u7f6e AUTO_INCREMENT \u81ea\u589e，\u63d2\u5165\u7684\u65f6\u5019\u4e0d\u7528\u7ed9 id \u4f20\u503c；\u5b57\u7b26\u7c7b\u578b\u6570\u636e\u5fc5\u987b\u52a0\u5355\u5f15\u53f7\u3002\u53f7\u3002<\/p>\n

## \u56db\u3001\u4fee\u6539 Update（UPDATE\u4fee\u6539\u5df2\u7ecf\u5b58\u5728\u7684\u6570\u636e\u3002\u6570\u636e
\n```<\/span><\/span>sql<\/span>
\n— \u4fee\u6539\u5355\u4e2a\u5b57\u6bb5<\/span>
\nUPDATE<\/span> student SET<\/span> score =<\/span> 90<\/span> WHERE<\/span> id =<\/span> 1<\/span>;<\/span><\/p>\n

— \u4fee\u6539\u591a\u4e2a\u5b57UPDATE student SET age = 20, score = 85 WHERE name = '\u5f20\u4e09';';<\/span><\/p>\n

\u26a0\ufe0f\u3010\u91cd\u4e2d\u4e4b\u91cd\u3011UPDATE \u5982\u679c\u4e0d\u52a0 WHERE \u6761\u4ef6，\u6574\u5f20\u8868\u6240\u6709\u884c\u5168\u90e8\u88ab\u4fee\u6539，\u7ebf\u4e0a\u5e93\u5c5e\u4e8e\u91cd\u5927\u4e8b\u6545！
\n\u5efa\u8bae\u4e60\u5148\u5199 SELECT \u6838\u5bf9 WHERE \u6761\u4ef6\u6761\u4ef6，\u786e\u8ba4\u662f\u8981\u6539\u7684\u6570\u518d\u6539\u6210 UPDATE\u3002E\u3002## \u4e94\u3001\u5220\u9664 Delete (DELETE)E）<\/p>\n

— \u7269\u7406\u5220\u9664，\u5220\u6389\u8fd9\u4e00\u884c\u771f\u5b9e\u6570\u636e<\/span>
\nDELETE<\/span> FROM<\/span> student WHERE<\/span> id =<\/span> 2<\/span>;<\/span><\/p>\n

\u4e09\u4e2a\u5220\u9664\u8bed\u53e5\u5bf9\u6bd4（\u8003\u8bd5\u9ad8\u9891\u8003\u70b9）<\/h4>\n

|\u8bed\u53e5|\u4f5c\u7528|\u80fd\u4e0d\u80fd\u5e26where|\u81ea\u589e\u4e3b\u952e|\u4e8b\u52a1\u53ef\u56de\u6eda|
\n| —- | —- | —- | —- | —- | DELETE | \u5220\u9664\u884c\u6570\u636e | \u2705 \u652f\u6301 | \u4fdd\u7559，\u4e0d\u4f1a\u91cd\u7f6e | \u2705 \u53ef\u4ee5\u56de\u6eda |\u6eda| TRUNCATE | \u6e05\u7a7a\u6574\u5f20\u8868 | \u274c \u4e0d\u80fd | \u91cd\u7f6e\u4ece 1 \u5f00\u59cb | \u274c \u4e0d\u652f\u6301\u56de\u6eda |\u6eda| DROP | \u76f4\u63a5\u5220\u6389\u6574\u4e2a\u8868\u7ed3\u6784 | \u274c \u4e0d\u80fd | \u8868\u76f4\u63a5\u6d88\u5931 | \u274c \u4e0d\u652f\u6301\u56de\u6eda |\u6eda|> 💡 \u4e1a\u52a1\u5e38\u7528\u65b9\u6848：\u903b\u8f91\u5220\u9664（\u8f6f\u5220\u9664），\u4e0d\u6267\u884c DELETE\u3002<\/p>\n

\u66f4\u65b0 is_delete=1 \u4ee3\u8868\u5220\u9664，\u67e5\u8be2\u7684\u65f6\u5019\u5e26\u4e0a WHERE is_delete=0=0`<\/p>\n

— \u903b\u8f91\u5220\u9664<\/span>
\nUPDATE<\/span> student SET<\/span> is_delete=<\/span>1<\/span> WHERE<\/span> id=<\/span>3<\/span>;<\/span>
\n— \u67e5\u8be2\u6709\u6548\u6570\u636e<\/span>
\nSELECT<\/span> *<\/span> FROM<\/span> student WHERE<\/span> is_delete=<\/span>0<\/span>;<\/span><\/p>\n

\u516d\u3001Python pymysql \u8fde\u63a5\u6570\u636e\u5e93\u5b9e\u73b0CRUD<\/h3>\n

1\u3001\u5148\u5b89\u88c5\u4f9d\u8d56<\/h4>\n

pip install<\/span> pymysql
\n`<\/span>### 2\u3001\u5c01\u88c5\u5de5\u5177\u7c7b db.py（\u8003\u8bd5 + \u9879\u76ee\u901a\u7528\u6a21\u677f）\u6a21\u677f）<\/span>
\n`<\/span><\/span>``python
\nimport<\/span> pymysql<\/p>\n

class MySQLHelper:
\n def __init__(<\/span>self, host<\/span>=<\/span>'localhost'<\/span>, user<\/span>=<\/span>'root'<\/span>, password<\/span>=<\/span>'123456'<\/span>, database<\/span>=<\/span>'test_db'<\/span>)<\/span>:
\n # \u5efa\u7acb\u6570\u636e\u5e93\u8fde\u63a5<\/span>
\n self.conn =<\/span> pymysql.connect(<\/span>
\n host<\/span>=<\/span>host,
\n user<\/span>=<\/span>user,
\n password<\/span>=<\/span>password,
\n database<\/span>=<\/span>database,
\n charset<\/span>=<\/span>'utf8mb4'<\/span>,
\n cursorclass<\/span>=<\/span>pymysql.cursors.DictCursor
\n )<\/span><\/p>\n

# \u67e5\u8be2\u591a\u6761<\/span>
\n def query_all(<\/span>self, sql, params<\/span>=<\/span>None)<\/span>:
\n params =<\/span> params or (<\/span>)<\/span>
\n with self.conn.cursor(<\/span>)<\/span> as cur:
\n cur.execute(<\/span>sql, params)<\/span>
\n return<\/span> cur.fetchall(<\/span>)<\/span><\/p>\n

# \u67e5\u8be2\u5355\u6761<\/span>
\n def query_one(<\/span>self, sql, params<\/span>=<\/span>None)<\/span>:
\n params =<\/span> params or (<\/span>)<\/span>
\n with self.conn.cursor(<\/span>)<\/span> as cur:
\n cur.execute(<\/span>sql, params)<\/span>
\n return<\/span> cur.fetchone(<\/span>)<\/span><\/p>\n

# \u589e\u3001\u6539\u3001\u5220\u7edf\u4e00\u65b9\u6cd5<\/span>
\n def execute_sql(<\/span>self, sql, params<\/span>=<\/span>None)<\/span>:
\n params =<\/span> params or (<\/span>)<\/span>
\n with self.conn.cursor(<\/span>)<\/span> as cur:
\n cur.execute(<\/span>sql, params)<\/span>
\n self.conn.commit(<\/span>)<\/span> # DML\u64cd\u4f5c\u5fc5\u987b\u63d0\u4ea4\u4e8b\u52a1<\/span>
\n return<\/span> cur.rowcount<\/p>\n

# \u5173\u95ed\u8fde\u63a5<\/span>
\n def close(<\/span>self)<\/span>:
\n self.conn.close(<\/span>)<\/span><\/p>\n

# \u6d4b\u8bd5\u8c03\u7528<\/span>
\nif<\/span> __name__ ==<\/span> '__main__'<\/span>:<\/span>
\n db =<\/span> MySQLHelper(<\/span>password=<\/span>"\u4f60\u7684\u6570\u636e\u5e93\u5bc6\u7801"<\/span>, database<\/span>=<\/span>"student"<\/span>)<\/span><\/p>\n

# \u65b0\u589e<\/span>
\n # sql = "INSERT INTO student(name,age,score) VALUES (%s,%s,%s)"<\/span>
\n # db.execute_sql(sql, ("\u5c0f\u660e",18,80))<\/span><\/p>\n

# \u4fee\u6539<\/span>
\n # sql = "UPDATE student SET score=%s WHERE id=%s"<\/span>
\n # db.execute_sql(sql, (86, 1))<\/span><\/p>\n

# \u5220\u9664<\/span>
\n # sql = "DELETE FROM student WHERE id=%s"<\/span>
\n # db.execute_sql(sql, (1,))<\/span><\/p>\n

# \u67e5\u8be2<\/span>
\n res =<\/span> db.query_all(<\/span>"SELECT * FROM student WHERE is_delete=0"<\/span>)<\/span>
\n print(<\/span>res)<\/span>
\n db.close(<\/span>)<\/span><\/p>\n

💡 > 1. %s \u662f\u5360\u4f4d\u7b26，\u4e0d\u662f\u5b57\u7b26\u4e32\u62fc\u63a5！\u7528\u6765\u9632\u6b62 SQL \u6ce8\u5165，\u7edd\u5bf9\u4e0d\u8981\u7528 f-string \u62fc\u63a5 SQL \u8bed\u53e5\u8bed\u53e5**
\n2. insert\/update\/delete \u6267\u884c\u5b8c\u5fc5\u987b commit() \u63d0\u4ea4\u4e8b\u52a1，\u5426\u5219\u6570\u636e\u5e93\u6570\u636e\u4e0d\u4f1a\u53d8\u5316
\n3. with \u7ba1\u7406\u6e38\u6807，\u81ea\u52a8\u5173\u95ed\u6e38\u6807，\u4e0d\u7528\u624b\u52a8\u5199 cur.close()<\/p>\n

\u4e03\u3001\u9ad8\u9891\u66131. DQL（select）\u4e0d\u7528 commit；DML（insert\/update\/delete）\u9700\u8981 commitm2. update\u3001delete \u4e00\u5b9a\u8981\u52a0 where \u6761\u4ef6r3. \u6a21\u7cca\u67e5\u8be2 % \u5339\u914d\u4efb\u610f\u5b57\u7b26，_ \u5339\u914d\u5355\u4e2a\u5b57\u7b26\u53554. \u5916\u952e\u7ea6\u675f\u4fdd\u8bc1\u53c2\u7167\u5b8c\u6574\u6027，\u4e3b\u952e\u552f\u4e00\u975e\u7a7a，\u552f\u4e00\u7ea6\u675f\u5141\u8bb8\u4e00\u4e2a nulln5. \u4e8b\u52a1 ACID：\u539f\u5b50\u6027\u3001\u4e00\u81f4\u6027\u3001\u9694\u79bb\u6027\u3001\u6301\u4e45\u6027\u3001\u6301\u4e45\u6027<\/h3>\n
  • \u903b\u8f91\u5220\u9664\u9002\u5408\u4e1a\u52a1\u7cfb\u7edf，\u7269\u7406\u5220\u9664\u4e00\u822c\u7528\u4e8e\u6e05\u7406\u5783\u573e\u6570\u636e<\/li>\n

    \u516bCRUD \u770b\u7740\u7b80\u5355，\u4f46\u662f\u7ec6\u8282\u5751\u975e\u5e38\u591a\u3002\u719f\u7ec3\u638c\u63e1\u539f\u751f SQL，\u518d\u642d\u914d Python \u5c01\u88c5\u5de5\u5177\u7c7b，\u5de5\u5177\u7c7b，\u4e0d\u7ba1\u662f\u6570\u636e\u5e93\u671f\u672b\u8003\u8bd5\u3001\u540e\u7aef\u5f00\u53d1\u5199\u63a5\u53e3，\u90fd\u591f\u7528\u4e86\u3002\u540e\u7eed\u53ef\u4ee5\u7ee7\u7eed\u5b66\u4e60\u7d22\u5f15\u3001\u4e8b\u52a1\u3001\u9501\u3001\u8054\u8868\u67e5\u8be2\u8fd9\u4e9b\u8fdb\u9636\u5185\u5bb9\u3002<\/h3>\n
    \n

    \u6807\u7b7e：MySQL CRUD pymysql \u6570\u636e\u5e93\u589e\u5220\u6539\u67e5 Python\u64cd\u4f5c\u6570\u636e\u5e93<\/p>\n","protected":false},"excerpt":{"rendered":"

    MySQL \u589e\u5220\u6539\u67e5（CRUD）\u8be6\u89e3 Python pymysql\u5b9e\u64cd\u9002\u914dCSDN Markdown，\u76f4\u63a5\u5168\u9009\u590d\u5236\u7c98\u8d34\u5373\u53ef，\u65e0\u7279\u6b8a\u6837\u5f0f，\u4ee3\u7801\u5757\u3001\u8868\u683c\u6b63\u5e38\u8bc6\u522b\u524d\u8a00
    \nCRUD \u662f\u6570\u636e\u5e93\u6700\u6838\u5fc3\u7684\u56db\u4e2a\u64cd\u4f5c：\u65b0\u589e（Create）\u3001\u67e5\u8be2（Read）\u3001\u4fee\u6539（Update）\u3001\u5220\u9664（Delete）\u3002<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[114,81,371,190,100],"topic":[],"class_list":["post-121197","post","type-post","status-publish","format-standard","hentry","category-server","tag-mysql","tag-python","tag-371","tag-190","tag-100"],"yoast_head":"\nMySQL \u589e\u5220\u6539\u67e5\uff08CRUD\uff09\u8be6\u89e3 + Python pymysql\u5b9e\u64cd - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wsisp.com\/helps\/121197.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"MySQL \u589e\u5220\u6539\u67e5\uff08CRUD\uff09\u8be6\u89e3 + Python pymysql\u5b9e\u64cd - 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