{"id":1052,"date":"2023-03-24T09:47:07","date_gmt":"2023-03-24T01:47:07","guid":{"rendered":""},"modified":"2023-03-24T09:47:07","modified_gmt":"2023-03-24T01:47:07","slug":"Python PyMySQL","status":"publish","type":"post","link":"https:\/\/bianchenghao6.com\/1052.html","title":{"rendered":"Python PyMySQL"},"content":{"rendered":"


\n <\/head>
\n <\/p>\n

\n

Python PyMySQL<\/h1>\n

\u641e\u61c2Python PyMySQL\u7684\u57fa\u672c\u64cd\u4f5c<\/span>\n <\/div>\n

\n \u672c\u6587\u6211\u4eec\u4e3a\u5927\u5bb6\u4ecb\u7ecd Python3 \u4f7f\u7528
\n PyMySQL \u8fde\u63a5\u6570\u636e\u5e93\uff0c\u5e76\u5b9e\u73b0\u7b80\u5355\u7684\u589e\u5220\u6539\u67e5\u3002\n <\/div>\n

\u4ec0\u4e48\u662f PyMySQL\uff1f<\/h3>\n
\n PyMySQL \u662f\u5728 Python3.x \u7248\u672c\u4e2d\u7528\u4e8e\u8fde\u63a5 MySQL \u670d\u52a1\u5668\u7684\u4e00\u4e2a\u5e93\uff0cPython2\u4e2d\u5219\u4f7f\u7528mysqldb\u3002
\n
PyMySQL \u9075\u5faa Python \u6570\u636e\u5e93 API v2.0 \u89c4\u8303\uff0c\u5e76\u5305\u542b\u4e86 pure-Python MySQL \u5ba2\u6237\u7aef\u5e93\u3002\n <\/div>\n
\n

PyMySQL \u5b89\u88c5<\/h3>\n
\n \u5728\u4f7f\u7528 PyMySQL \u4e4b\u524d\uff0c\u6211\u4eec\u9700\u8981\u786e\u4fdd PyMySQL \u5df2\u5b89\u88c5\u3002
\n
PyMySQL \u4e0b\u8f7d\u5730\u5740\uff1ahttps:\/\/github.com\/PyMySQL\/PyMySQL\u3002
\n
\u5982\u679c\u8fd8\u672a\u5b89\u88c5\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u5b89\u88c5\u6700\u65b0\u7248\u7684 PyMySQL\uff1a\n <\/div>\n
\n
 $ pip3 install PyMySQL
 <\/span><\/code><\/pre>\n<\/p><\/div>\n
\n    \u5982\u679c\u4f60\u7684\u7cfb\u7edf\u4e0d\u652f\u6301 pip \u547d\u4ee4\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u65b9\u5f0f\u5b89\u88c5\uff1a\n  <\/div>\n
\n    1\u3001\u4f7f\u7528 git \u547d\u4ee4\u4e0b\u8f7d\u5b89\u88c5\u5305\u5b89\u88c5(\u4f60\u4e5f\u53ef\u4ee5\u624b\u52a8\u4e0b\u8f7d)\uff1a\n  <\/div>\n
\n
 $ git clone https:\/\/github.com\/PyMySQL\/PyMySQL
 $ cd PyMySQL\/
 $ python setup.py install
 <\/span><\/code><\/pre>\n<\/p><\/div>\n
\n    2\u3001\u5982\u679c\u9700\u8981\u5236\u5b9a\u7248\u672c\u53f7\uff0c\u53ef\u4ee5\u4f7f\u7528 curl \u547d\u4ee4\u6765\u5b89\u88c5\uff1a\n  <\/div>\n
\n
 $ # X.X \u4e3a PyMySQL \u7684\u7248\u672c\u53f7
<\/span> $ curl -L https:\/\/github.com\/PyMySQL\/PyMySQL\/tarball\/pymysql-X.X | tar xz
 $ cd PyMySQL*
 $ python setup.py install
 $ # \u73b0\u5728\u4f60\u53ef\u4ee5\u5220\u9664 PyMySQL* \u76ee\u5f55
<\/span> <\/span><\/code><\/pre>\n<\/p><\/div>\n
\n   \u6ce8\u610f\uff1a<\/span>\u8bf7\u786e\u4fdd\u60a8\u6709root\u6743\u9650\u6765\u5b89\u88c5\u4e0a\u8ff0\u6a21\u5757\u3002\n  <\/div>\n
\n    \u5b89\u88c5\u7684\u8fc7\u7a0b\u4e2d\u53ef\u80fd\u4f1a\u51fa\u73b0\"ImportError: No module named setuptools\"\u7684\u9519\u8bef\u63d0\u793a\uff0c\u610f\u601d\u662f\u4f60\u6ca1\u6709\u5b89\u88c5setuptools\uff0c\u4f60\u53ef\u4ee5\u8bbf\u95ee
\n   https:\/\/pypi.python.org\/pypi\/setuptools \u627e\u5230\u5404\u4e2a\u7cfb\u7edf\u7684\u5b89\u88c5\u65b9\u6cd5\u3002\n  <\/div>\n
\n    Linux \u7cfb\u7edf\u5b89\u88c5\u5b9e\u4f8b\uff1a\n  <\/div>\n
\n
 $ wget https:\/\/bootstrap.pypa.io\/ez_setup.py
 $ python ez_setup.py
 <\/span><\/code><\/pre>\n<\/p><\/div>\n
\n
\u6570\u636e\u5e93\u8fde\u63a5<\/h3>\n
\n    \u8fde\u63a5\u6570\u636e\u5e93\u524d\uff0c\u8bf7\u5148\u786e\u8ba4\u4ee5\u4e0b\u4e8b\u9879\uff1a\n  <\/div>\n
  \u60a8\u5df2\u7ecf\u521b\u5efa\u4e86\u6570\u636e\u5e93 TESTDB.<\/span>
\n  \u5728TESTDB\u6570\u636e\u5e93\u4e2d\u60a8\u5df2\u7ecf\u521b\u5efa\u4e86\u8868 EMPLOYEE<\/span>
\n  EMPLOYEE\u8868\u5b57\u6bb5\u4e3a FIRST_NAME, LAST_NAME, AGE, SEX \u548c INCOME\u3002<\/span>
\n  \u8fde\u63a5\u6570\u636e\u5e93TESTDB\u4f7f\u7528\u7684\u7528\u6237\u540d\u4e3a \"testuser\" \uff0c\u5bc6\u7801\u4e3a \"test123\",\u4f60\u53ef\u4ee5\u81ea\u5b9a\u4e49root\u7528\u6237\u540d\u53ca\u5176\u5bc6\u7801\u3002<\/span>
\n  \u5728\u4f60\u7684\u673a\u5b50\u4e0a\u5df2\u7ecf\u5b89\u88c5\u4e86 Python MySQLdb \u6a21\u5757\u3002<\/span> <\/p>\n
\n
 import <\/span>pymysql
  
 # \u6253\u5f00\u6570\u636e\u5e93\u8fde\u63a5
<\/span> db = pymysql.connect<\/span>(\"localhost\"<\/span>,\"testuser\"<\/span>,\"test123\"<\/span>,\"TESTDB\"<\/span> )
  
 # \u4f7f\u7528 cursor() \u65b9\u6cd5\u521b\u5efa\u4e00\u4e2a\u6e38\u6807\u5bf9\u8c61 cursor
<\/span> cursor <\/span>= db.cursor<\/span>()
  
 # \u4f7f\u7528 execute() \u65b9\u6cd5\u6267\u884c SQL \u67e5\u8be2 
<\/span> cursor.execute<\/span>(\"SELECT VERSION()\"<\/span>)
  
 # \u4f7f\u7528 fetchone() \u65b9\u6cd5\u83b7\u53d6\u5355\u6761\u6570\u636e.
<\/span> data = cursor.fetchone<\/span>()
  
 print <\/span>(\"Database version : %s \"<\/span> % data)
  
 # \u5173\u95ed\u6570\u636e\u5e93\u8fde\u63a5
<\/span> db.close<\/span>()
 <\/span><\/code><\/pre>\n<\/p><\/div>\n
\n    \u6267\u884c\u7ed3\u679c\uff1a\n  <\/div>\n
\n
Database version : 5.5.20-log
<\/span><\/code><\/pre>\n<\/p><\/div>\n
\n
\u521b\u5efa\u6570\u636e\u5e93\u8868<\/h3>\n
\n    \u5982\u679c\u6570\u636e\u5e93\u8fde\u63a5\u5b58\u5728\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528execute()\u65b9\u6cd5\u6765\u4e3a\u6570\u636e\u5e93\u521b\u5efa\u8868\uff0c\u5982\u4e0b\u6240\u793a\u521b\u5efa\u8868EMPLOYEE\uff1a\n  <\/div>\n
\n
 import <\/span>pymysql
  
 # \u6253\u5f00\u6570\u636e\u5e93\u8fde\u63a5
<\/span> db = pymysql.connect<\/span>(\"localhost\"<\/span>,\"testuser\"<\/span>,\"test123\"<\/span>,\"TESTDB\"<\/span> )
  
 # \u4f7f\u7528 cursor() \u65b9\u6cd5\u521b\u5efa\u4e00\u4e2a\u6e38\u6807\u5bf9\u8c61 cursor
<\/span> cursor <\/span>= db.cursor<\/span>()
  
 # \u4f7f\u7528 execute() \u65b9\u6cd5\u6267\u884c SQL\uff0c\u5982\u679c\u8868\u5b58\u5728\u5219\u5220\u9664
<\/span> cursor.execute<\/span>(\"DROP TABLE if <\/span>EXISTS EMPLOYEE\"<\/span>)
  
 # \u4f7f\u7528\u9884\u5904\u7406\u8bed\u53e5\u521b\u5efa\u8868
<\/span> sql = \"\"<\/span><\/span>\"CREATE TABLE EMPLOYEE (
          FIRST_NAME CHAR(20) not <\/span>NULL,
          LAST_NAME CHAR(20),
          AGE INT, 
          SEX CHAR(1),
          INCOME FLOAT )\"\"\"
  
 cursor.execute<\/span>(sql)
  
 # \u5173\u95ed\u6570\u636e\u5e93\u8fde\u63a5
<\/span> db.close<\/span>()
 <\/span><\/code><\/pre>\n<\/p><\/div>\n
\n
\u6570\u636e\u5e93\u63d2\u5165\u64cd\u4f5c<\/h2>\n
\n    \u4ee5\u4e0b\u5b9e\u4f8b\u4f7f\u7528\u6267\u884c SQL INSERT \u8bed\u53e5\u5411\u8868 EMPLOYEE \u63d2\u5165\u8bb0\u5f55\uff1a\n  <\/div>\n
\n
 import <\/span>pymysql
  
 # \u6253\u5f00\u6570\u636e\u5e93\u8fde\u63a5
<\/span> db = pymysql.connect<\/span>(\"localhost\"<\/span>,\"testuser\"<\/span>,\"test123\"<\/span>,\"TESTDB\"<\/span> )
  
 # \u4f7f\u7528cursor()\u65b9\u6cd5\u83b7\u53d6\u64cd\u4f5c\u6e38\u6807 
<\/span> cursor <\/span>= db.cursor<\/span>()
  
 # SQL \u63d2\u5165\u8bed\u53e5
<\/span> sql = \"\"<\/span><\/span>\"INSERT INTO EMPLOYEE(FIRST_NAME,
          LAST_NAME, AGE, SEX, INCOME)
          VALUES ('Mac'<\/span>, 'Mohan'<\/span>, 20, 'M'<\/span>, 2000)\"\"\"
 try:
    # \u6267\u884csql\u8bed\u53e5
<\/span>    cursor.execute<\/span>(sql)
    # \u63d0\u4ea4\u5230\u6570\u636e\u5e93\u6267\u884c
<\/span>    db.commit<\/span>()
 except:
    # \u5982\u679c\u53d1\u751f\u9519\u8bef\u5219\u56de\u6eda
<\/span>    db.rollback<\/span>()
  
 # \u5173\u95ed\u6570\u636e\u5e93\u8fde\u63a5
<\/span> db.close<\/span>()
 <\/span><\/code><\/pre>\n<\/p><\/div>\n
\n    \u4ee5\u4e0a\u4f8b\u5b50\u4e5f\u53ef\u4ee5\u5199\u6210\u5982\u4e0b\u5f62\u5f0f\uff1a\n  <\/div>\n
\n
 import <\/span>pymysql
  
 # \u6253\u5f00\u6570\u636e\u5e93\u8fde\u63a5
<\/span> db = pymysql.connect<\/span>(\"localhost\"<\/span>,\"testuser\"<\/span>,\"test123\"<\/span>,\"TESTDB\"<\/span> )
  
 # \u4f7f\u7528cursor()\u65b9\u6cd5\u83b7\u53d6\u64cd\u4f5c\u6e38\u6807 
<\/span> cursor <\/span>= db.cursor<\/span>()
  
 # SQL \u63d2\u5165\u8bed\u53e5
<\/span> sql = \"INSERT INTO EMPLOYEE(FIRST_NAME, \\
        LAST_NAME, AGE, SEX, INCOME) \\
        VALUES ('%s'<\/span><\/span><\/span>, '%s', %s, '%s', %s)\" % \\
        ('Mac'<\/span>, 'Mohan'<\/span>, 20, 'M'<\/span>, 2000)
 try:
    # \u6267\u884csql\u8bed\u53e5
<\/span><\/span>    cursor.execute<\/span>(sql)
    # \u6267\u884csql\u8bed\u53e5
    db.commit<\/span>()
 except:
    # \u53d1\u751f\u9519\u8bef\u65f6\u56de\u6eda
<\/span>    db.rollback<\/span>()
  
 # \u5173\u95ed\u6570\u636e\u5e93\u8fde\u63a5
<\/span> db.close<\/span>()
 <\/span><\/code><\/pre>\n<\/p><\/div>\n
\n    \u4ee5\u4e0b\u4ee3\u7801\u4f7f\u7528\u53d8\u91cf\u5411SQL\u8bed\u53e5\u4e2d\u4f20\u9012\u53c2\u6570:\n  <\/div>\n
\n
 ..................................
 user_id = \"test123\"<\/span>
 password = \"password\"<\/span>
 con.execute<\/span>('insert into Login <\/span>values( %s, %s)'<\/span> % (user_id, password))
 ..................................
 <\/span><\/code><\/pre>\n<\/p><\/div>\n
\u6570\u636e\u5e93\u67e5\u8be2\u64cd\u4f5c<\/h2>\n
\n    Python\u67e5\u8be2Mysql\u4f7f\u7528 fetchone() \u65b9\u6cd5\u83b7\u53d6\u5355\u6761\u6570\u636e, \u4f7f\u7528fetchall() \u65b9\u6cd5\u83b7\u53d6\u591a\u6761\u6570\u636e\u3002\n  <\/div>\n
  fetchone(): \u8be5\u65b9\u6cd5\u83b7\u53d6\u4e0b\u4e00\u4e2a\u67e5\u8be2\u7ed3\u679c\u96c6\u3002\u7ed3\u679c\u96c6\u662f\u4e00\u4e2a\u5bf9\u8c61<\/span>
\n  fetchall(): \u63a5\u6536\u5168\u90e8\u7684\u8fd4\u56de\u7ed3\u679c\u884c.<\/span>
\n  rowcount: \u8fd9\u662f\u4e00\u4e2a\u53ea\u8bfb\u5c5e\u6027\uff0c\u5e76\u8fd4\u56de\u6267\u884cexecute()\u65b9\u6cd5\u540e\u5f71\u54cd\u7684\u884c\u6570\u3002<\/span> <\/p>\n
\n
 import <\/span>pymysql
  
 # \u6253\u5f00\u6570\u636e\u5e93\u8fde\u63a5
<\/span> db = pymysql.connect<\/span>(\"localhost\"<\/span>,\"testuser\"<\/span>,\"test123\"<\/span>,\"TESTDB\"<\/span> )
  
 # \u4f7f\u7528cursor()\u65b9\u6cd5\u83b7\u53d6\u64cd\u4f5c\u6e38\u6807 
<\/span> cursor <\/span>= db.cursor<\/span>()
  
 # SQL \u67e5\u8be2\u8bed\u53e5
<\/span> sql = \"SELECT * from <\/span>EMPLOYEE \\
        WHERE INCOME > %s\" % (1000)
 try:
    # \u6267\u884cSQL\u8bed\u53e5
<\/span>    cursor.execute<\/span>(sql)
    # \u83b7\u53d6\u6240\u6709\u8bb0\u5f55\u5217\u8868
<\/span>    results = cursor.fetchall<\/span>()
    for <\/span><\/span>row in <\/span>results:
       fname = row[0]
       lname = row[1]
       age = row[2]
       sex = row[3]
       income = row[4]
        # \u6253\u5370\u7ed3\u679c
<\/span>       print <\/span>(\"fname=%s,lname=%s,age=%s,sex=%s,income=%s\"<\/span> % \\
              (fname, lname, age, sex, income ))
 except:
    print <\/span>(\"Error: unable to fetch data\"<\/span>)
  
 # \u5173\u95ed\u6570\u636e\u5e93\u8fde\u63a5
<\/span> db.close<\/span>()
 <\/span><\/code><\/pre>\n<\/p><\/div>\n
\n    \u4ee5\u4e0a\u811a\u672c\u6267\u884c\u7ed3\u679c\u5982\u4e0b\uff1a\n  <\/div>\n
\n
 fname=Mac, lname=Mohan, age=20, sex=M, income=2000
 <\/span><\/code><\/pre>\n<\/p><\/div>\n
\u6570\u636e\u5e93\u66f4\u65b0\u64cd\u4f5c<\/h2>\n
\n    \u66f4\u65b0\u64cd\u4f5c\u7528\u4e8e\u66f4\u65b0\u6570\u636e\u8868\u7684\u7684\u6570\u636e\uff0c\u4ee5\u4e0b\u5b9e\u4f8b\u5c06 TESTDB \u8868\u4e2d SEX \u4e3a 'M' \u7684 AGE \u5b57\u6bb5\u9012\u589e 1\uff1a\n  <\/div>\n
\n
 import <\/span>pymysql
  
 # \u6253\u5f00\u6570\u636e\u5e93\u8fde\u63a5
<\/span> db = pymysql.connect<\/span>(\"localhost\"<\/span>,\"testuser\"<\/span>,\"test123\"<\/span>,\"TESTDB\"<\/span> )
  
 # \u4f7f\u7528cursor()\u65b9\u6cd5\u83b7\u53d6\u64cd\u4f5c\u6e38\u6807 
<\/span> cursor <\/span>= db.cursor<\/span>()
  
 # SQL \u66f4\u65b0\u8bed\u53e5
<\/span> sql = \"UPDATE EMPLOYEE SET AGE = AGE + 1 WHERE SEX = '<\/span>%c'\"<\/span> % ('M'<\/span>)
 try:
    # \u6267\u884cSQL\u8bed\u53e5
<\/span>    cursor.execute<\/span>(sql)
    # \u63d0\u4ea4\u5230\u6570\u636e\u5e93\u6267\u884c
<\/span>    db.commit<\/span>()
 except:
    # \u53d1\u751f\u9519\u8bef\u65f6\u56de\u6eda
<\/span>    db.rollback<\/span>()
  
 # \u5173\u95ed\u6570\u636e\u5e93\u8fde\u63a5
<\/span> db.close<\/span>()
 <\/span><\/code><\/pre>\n<\/p><\/div>\n
\u5220\u9664\u64cd\u4f5c<\/h2>\n
\n    \u5220\u9664\u64cd\u4f5c\u7528\u4e8e\u5220\u9664\u6570\u636e\u8868\u4e2d\u7684\u6570\u636e\uff0c\u4ee5\u4e0b\u5b9e\u4f8b\u6f14\u793a\u4e86\u5220\u9664\u6570\u636e\u8868 EMPLOYEE \u4e2d AGE \u5927\u4e8e 20 \u7684\u6240\u6709\u6570\u636e\uff1a\n  <\/div>\n
\n
 import <\/span>pymysql
  
 # \u6253\u5f00\u6570\u636e\u5e93\u8fde\u63a5
<\/span> db = pymysql.connect<\/span>(\"localhost\"<\/span>,\"testuser\"<\/span>,\"test123\"<\/span>,\"TESTDB\"<\/span> )
  
 # \u4f7f\u7528cursor()\u65b9\u6cd5\u83b7\u53d6\u64cd\u4f5c\u6e38\u6807 
<\/span> cursor <\/span>= db.cursor<\/span>()
  
 # SQL \u5220\u9664\u8bed\u53e5
<\/span> sql = \"DELETE from <\/span>EMPLOYEE WHERE AGE > %s\"<\/span> % (20)
 try:
    # \u6267\u884cSQL\u8bed\u53e5
<\/span>    cursor.execute<\/span>(sql)
    # \u63d0\u4ea4\u4fee\u6539
<\/span>    db.commit<\/span>()
 except:
    # \u53d1\u751f\u9519\u8bef\u65f6\u56de\u6eda
<\/span>    db.rollback<\/span>()
  
 # \u5173\u95ed\u8fde\u63a5
<\/span> db.close<\/span>()
 <\/span><\/code><\/pre>\n<\/p><\/div>\n
\u6267\u884c\u4e8b\u52a1<\/h2>\n
\n    \u4e8b\u52a1\u673a\u5236\u53ef\u4ee5\u786e\u4fdd\u6570\u636e\u4e00\u81f4\u6027\u3002
\n   
\u4e8b\u52a1\u5e94\u8be5\u5177\u67094\u4e2a\u5c5e\u6027\uff1a\u539f\u5b50\u6027\u3001\u4e00\u81f4\u6027\u3001\u9694\u79bb\u6027\u3001\u6301\u4e45\u6027\u3002\u8fd9\u56db\u4e2a\u5c5e\u6027\u901a\u5e38\u79f0\u4e3aACID\u7279\u6027\u3002\n  <\/div>\n
  \u539f\u5b50\u6027\uff08atomicity\uff09: <\/b>\u4e00\u4e2a\u4e8b\u52a1\u662f\u4e00\u4e2a\u4e0d\u53ef\u5206\u5272\u7684\u5de5\u4f5c\u5355\u4f4d\uff0c\u4e8b\u52a1\u4e2d\u5305\u62ec\u7684\u8bf8\u64cd\u4f5c\u8981\u4e48\u90fd\u505a\uff0c\u8981\u4e48\u90fd\u4e0d\u505a\u3002<\/span>
\n  \u4e00\u81f4\u6027\uff08consistency\uff09: <\/b>\u4e8b\u52a1\u5fc5\u987b\u662f\u4f7f\u6570\u636e\u5e93\u4ece\u4e00\u4e2a\u4e00\u81f4\u6027\u72b6\u6001\u53d8\u5230\u53e6\u4e00\u4e2a\u4e00\u81f4\u6027\u72b6\u6001\u3002\u4e00\u81f4\u6027\u4e0e\u539f\u5b50\u6027\u662f\u5bc6\u5207\u76f8\u5173\u7684\u3002<\/span>
\n  \u9694\u79bb\u6027\uff08isolation\uff09 : <\/b>\u4e00\u4e2a\u4e8b\u52a1\u7684\u6267\u884c\u4e0d\u80fd\u88ab\u5176\u4ed6\u4e8b\u52a1\u5e72\u6270,\u5e76\u53d1\u6267\u884c\u7684\u5404\u4e2a\u4e8b\u52a1\u4e4b\u95f4\u4e0d\u80fd\u4e92\u76f8\u5e72\u6270\u3002<\/span>
\n  \u6301\u4e45\u6027\uff08durability\uff09: <\/b>\u6307\u4e00\u4e2a\u4e8b\u52a1\u4e00\u65e6\u63d0\u4ea4\uff0c\u5b83\u5bf9\u6570\u636e\u5e93\u4e2d\u6570\u636e\u7684\u6539\u53d8\u5c31\u5e94\u8be5\u662f\u6c38\u4e45\u6027\u7684\u3002\u63a5\u4e0b\u6765\u7684\u5176\u4ed6\u64cd\u4f5c\u6216\u6545\u969c\u4e0d\u5e94\u8be5\u5bf9\u5176\u6709\u4efb\u4f55\u5f71\u54cd\u3002<\/span> <\/p>\n
\n    Python DB API 2.0 \u7684\u4e8b\u52a1\u63d0\u4f9b\u4e86\u4e24\u4e2a\u65b9\u6cd5 commit \u6216 rollback\u3002\n  <\/div>\n
\n
 # SQL\u5220\u9664\u8bb0\u5f55\u8bed\u53e5
<\/span> sql = \"DELETE from <\/span>EMPLOYEE WHERE AGE > %s\"<\/span> % (20)
 try:
    # \u6267\u884cSQL\u8bed\u53e5
<\/span>    cursor.execute<\/span>(sql)
    # \u5411\u6570\u636e\u5e93\u63d0\u4ea4
<\/span>    db.commit<\/span>()
 except:
    # \u53d1\u751f\u9519\u8bef\u65f6\u56de\u6eda
<\/span>    db.rollback<\/span>()
 <\/span><\/code><\/pre>\n<\/p><\/div>\n
\n    \u5bf9\u4e8e\u652f\u6301\u4e8b\u52a1\u7684\u6570\u636e\u5e93\uff0c \u5728Python\u6570\u636e\u5e93\u7f16\u7a0b\u4e2d\uff0c\u5f53\u6e38\u6807\u5efa\u7acb\u4e4b\u65f6\uff0c\u5c31\u81ea\u52a8\u5f00\u59cb\u4e86\u4e00\u4e2a\u9690\u5f62\u7684\u6570\u636e\u5e93\u4e8b\u52a1\u3002
\n   
commit()\u65b9\u6cd5\u6e38\u6807\u7684\u6240\u6709\u66f4\u65b0\u64cd\u4f5c\uff0crollback\uff08\uff09\u65b9\u6cd5\u56de\u6eda\u5f53\u524d\u6e38\u6807\u7684\u6240\u6709\u64cd\u4f5c\u3002\u6bcf\u4e00\u4e2a\u65b9\u6cd5\u90fd\u5f00\u59cb\u4e86\u4e00\u4e2a\u65b0\u7684\u4e8b\u52a1\u3002\n  <\/div>\n
\u9519\u8bef\u5904\u7406<\/h3>\n
\n    DB API\u4e2d\u5b9a\u4e49\u4e86\u4e00\u4e9b\u6570\u636e\u5e93\u64cd\u4f5c\u7684\u9519\u8bef\u53ca\u5f02\u5e38\uff0c\u4e0b\u8868\u5217\u51fa\u4e86\u8fd9\u4e9b\u9519\u8bef\u548c\u5f02\u5e38:\n  <\/div>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\u5f02\u5e38<\/td>\n\u63cf\u8ff0<\/td>\n<\/tr>\n
Warning<\/td>\n\u5f53\u6709\u4e25\u91cd\u8b66\u544a\u65f6\u89e6\u53d1\uff0c\u4f8b\u5982\u63d2\u5165\u6570\u636e\u662f\u88ab\u622a\u65ad\u7b49\u7b49\u3002\u5fc5\u987b\u662f StandardError \u7684\u5b50\u7c7b\u3002<\/td>\n<\/tr>\n
Error<\/td>\n\u8b66\u544a\u4ee5\u5916\u6240\u6709\u5176\u4ed6\u9519\u8bef\u7c7b\u3002\u5fc5\u987b\u662f StandardError \u7684\u5b50\u7c7b\u3002<\/td>\n<\/tr>\n
InterfaceError<\/td>\n\u5f53\u6709\u6570\u636e\u5e93\u63a5\u53e3\u6a21\u5757\u672c\u8eab\u7684\u9519\u8bef\uff08\u800c\u4e0d\u662f\u6570\u636e\u5e93\u7684\u9519\u8bef\uff09\u53d1\u751f\u65f6\u89e6\u53d1\u3002 \u5fc5\u987b\u662fError\u7684\u5b50\u7c7b\u3002<\/td>\n<\/tr>\n
DatabaseError<\/td>\n\u548c\u6570\u636e\u5e93\u6709\u5173\u7684\u9519\u8bef\u53d1\u751f\u65f6\u89e6\u53d1\u3002 \u5fc5\u987b\u662fError\u7684\u5b50\u7c7b\u3002<\/td>\n<\/tr>\n
DataError<\/td>\n\u5f53\u6709\u6570\u636e\u5904\u7406\u65f6\u7684\u9519\u8bef\u53d1\u751f\u65f6\u89e6\u53d1\uff0c\u4f8b\u5982\uff1a\u9664\u96f6\u9519\u8bef\uff0c\u6570\u636e\u8d85\u8303\u56f4\u7b49\u7b49\u3002 \u5fc5\u987b\u662fDatabaseError\u7684\u5b50\u7c7b\u3002<\/td>\n<\/tr>\n
OperationalError<\/td>\n\u6307\u975e\u7528\u6237\u63a7\u5236\u7684\uff0c\u800c\u662f\u64cd\u4f5c\u6570\u636e\u5e93\u65f6\u53d1\u751f\u7684\u9519\u8bef\u3002\u4f8b\u5982\uff1a\u8fde\u63a5\u610f\u5916\u65ad\u5f00\u3001 \u6570\u636e\u5e93\u540d\u672a\u627e\u5230\u3001\u4e8b\u52a1\u5904\u7406\u5931\u8d25\u3001\u5185\u5b58\u5206\u914d\u9519\u8bef\u7b49\u7b49\u64cd\u4f5c\u6570\u636e\u5e93\u662f\u53d1\u751f\u7684\u9519\u8bef\u3002 \u5fc5\u987b\u662fDatabaseError\u7684\u5b50\u7c7b\u3002<\/td>\n<\/tr>\n
IntegrityError<\/td>\n\u5b8c\u6574\u6027\u76f8\u5173\u7684\u9519\u8bef\uff0c\u4f8b\u5982\u5916\u952e\u68c0\u67e5\u5931\u8d25\u7b49\u3002\u5fc5\u987b\u662fDatabaseError\u5b50\u7c7b\u3002<\/td>\n<\/tr>\n
InternalError<\/td>\n \u6570\u636e\u5e93\u7684\u5185\u90e8\u9519\u8bef\uff0c\u4f8b\u5982\u6e38\u6807\uff08cursor\uff09\u5931\u6548\u4e86\u3001\u4e8b\u52a1\u540c\u6b65\u5931\u8d25\u7b49\u7b49\u3002 \u5fc5\u987b\u662fDatabaseError\u5b50\u7c7b\u3002<\/td>\n<\/tr>\n
ProgrammingError<\/td>\n\u7a0b\u5e8f\u9519\u8bef\uff0c\u4f8b\u5982\u6570\u636e\u8868\uff08table\uff09\u6ca1\u627e\u5230\u6216\u5df2\u5b58\u5728\u3001SQL\u8bed\u53e5\u8bed\u6cd5\u9519\u8bef\u3001 \u53c2\u6570\u6570\u91cf\u9519\u8bef\u7b49\u7b49\u3002\u5fc5\u987b\u662fDatabaseError\u7684\u5b50\u7c7b\u3002<\/td>\n<\/tr>\n
NotSupportedError<\/td>\n\u4e0d\u652f\u6301\u9519\u8bef\uff0c\u6307\u4f7f\u7528\u4e86\u6570\u636e\u5e93\u4e0d\u652f\u6301\u7684\u51fd\u6570\u6216API\u7b49\u3002\u4f8b\u5982\u5728\u8fde\u63a5\u5bf9\u8c61\u4e0a \u4f7f\u7528.rollback()\u51fd\u6570\uff0c\u7136\u800c\u6570\u636e\u5e93\u5e76\u4e0d\u652f\u6301\u4e8b\u52a1\u6216\u8005\u4e8b\u52a1\u5df2\u5173\u95ed\u3002 \u5fc5\u987b\u662fDatabaseError\u7684\u5b50\u7c7b\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
 <\/body>
\n<\/html><\/p>\n","protected":false},"excerpt":{"rendered":"Python PyMySQLzh-cn","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[126],"tags":[],"class_list":["post-1052","post","type-post","status-publish","format-standard","hentry","category-python3"],"_links":{"self":[{"href":"https:\/\/bianchenghao6.com\/wp-json\/wp\/v2\/posts\/1052"}],"collection":[{"href":"https:\/\/bianchenghao6.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/bianchenghao6.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/bianchenghao6.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/bianchenghao6.com\/wp-json\/wp\/v2\/comments?post=1052"}],"version-history":[{"count":0,"href":"https:\/\/bianchenghao6.com\/wp-json\/wp\/v2\/posts\/1052\/revisions"}],"wp:attachment":[{"href":"https:\/\/bianchenghao6.com\/wp-json\/wp\/v2\/media?parent=1052"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/bianchenghao6.com\/wp-json\/wp\/v2\/categories?post=1052"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/bianchenghao6.com\/wp-json\/wp\/v2\/tags?post=1052"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}