{"id":1059791,"date":"2024-12-31T15:28:17","date_gmt":"2024-12-31T07:28:17","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/1059791.html"},"modified":"2024-12-31T15:28:22","modified_gmt":"2024-12-31T07:28:22","slug":"%e5%a6%82%e4%bd%95%e5%9c%a8python%e4%b8%ad%e6%98%be%e7%a4%ba%e6%95%b0%e6%8d%ae%e5%ba%93","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/1059791.html","title":{"rendered":"\u5982\u4f55\u5728python\u4e2d\u663e\u793a\u6570\u636e\u5e93"},"content":{"rendered":"

\"\u5982\u4f55\u5728python\u4e2d\u663e\u793a\u6570\u636e\u5e93\"<\/p>\n

\u5728Python\u4e2d\u663e\u793a\u6570\u636e\u5e93\uff0c\u53ef\u4ee5\u4f7f\u7528\u591a\u79cd\u65b9\u6cd5\uff0c\u5176\u4e2d\u5305\u62ec\u4f7f\u7528SQLAlchemy\u3001PyMySQL\u3001SQLite3\u7b49\u5e93\u6765\u8fde\u63a5\u548c\u67e5\u8be2\u6570\u636e\u5e93\u3001\u4f7f\u7528\u9002\u5f53\u7684\u67e5\u8be2\u8bed\u53e5\u6765\u663e\u793a\u6570\u636e\u5e93\u5185\u5bb9\u3002<\/strong> \u5176\u4e2d\uff0c\u4f7f\u7528SQLAlchemy\u662f\u4e00\u4e2a\u975e\u5e38\u6d41\u884c\u7684\u65b9\u6cd5\uff0c\u56e0\u4e3a\u5b83\u662f\u4e00\u4e2aORM\uff08\u5bf9\u8c61\u5173\u7cfb\u6620\u5c04\uff09\u5e93\uff0c\u4f7f\u5f97\u4e0e\u6570\u636e\u5e93\u7684\u4ea4\u4e92\u66f4\u52a0\u76f4\u89c2\u548c\u7b80\u4fbf\u3002\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u5982\u4f55\u4f7f\u7528\u8fd9\u4e9b\u65b9\u6cd5\u5728Python\u4e2d\u663e\u793a\u6570\u636e\u5e93\u5185\u5bb9\u3002<\/p>\n<\/p>\n

\u4e00\u3001\u4f7f\u7528SQLAlchemy\u663e\u793a\u6570\u636e\u5e93<\/p>\n<\/p>\n

SQLAlchemy\u662f\u4e00\u4e2a\u975e\u5e38\u5f3a\u5927\u7684\u5e93\uff0c\u5b83\u5141\u8bb8Python\u7a0b\u5e8f\u5458\u4f7f\u7528Python\u5bf9\u8c61\u6765\u7ba1\u7406\u6570\u636e\u5e93\u3002\u5b83\u652f\u6301\u591a\u79cd\u6570\u636e\u5e93\u7cfb\u7edf\uff0c\u5305\u62ecPostgreSQL\u3001MySQL\u3001SQLite\u7b49\u3002<\/p>\n<\/p>\n

1\u3001\u5b89\u88c5SQLAlchemy\uff1a<\/p>\n

\u9996\u5148\uff0c\u60a8\u9700\u8981\u5b89\u88c5SQLAlchemy\u3002\u60a8\u53ef\u4ee5\u4f7f\u7528pip\u6765\u5b89\u88c5\u5b83\uff1a<\/p>\n<\/p>\n

pip install sqlalchemy<\/p>\n
<\/code><\/pre>\n<\/p>\n
2\u3001\u8fde\u63a5\u6570\u636e\u5e93\uff1a<\/p>\n
\u63a5\u4e0b\u6765\uff0c\u60a8\u9700\u8981\u8fde\u63a5\u5230\u60a8\u7684\u6570\u636e\u5e93\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u8fde\u63a5\u5230SQLite\u6570\u636e\u5e93\u7684\u793a\u4f8b\uff1a<\/p>\n<\/p>\n
from sqlalchemy import create_engine<\/p>\n
\u521b\u5efa\u5f15\u64ce<\/strong><\/h2>\n
engine = create_engine('sqlite:\/\/\/example.db')<\/p>\n
\u8fde\u63a5\u5230\u6570\u636e\u5e93<\/strong><\/h2>\n
connection = engine.connect()<\/p>\n
<\/code><\/pre>\n<\/p>\n
3\u3001\u663e\u793a\u6570\u636e\u5e93\u5185\u5bb9\uff1a<\/p>\n
\u8981\u663e\u793a\u6570\u636e\u5e93\u4e2d\u7684\u5185\u5bb9\uff0c\u60a8\u9700\u8981\u6267\u884c\u4e00\u4e2a\u67e5\u8be2\uff0c\u5e76\u6253\u5370\u7ed3\u679c\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u67e5\u8be2\u793a\u4f8b\uff1a<\/p>\n<\/p>\n
from sqlalchemy import MetaData, Table<\/p>\n
\u521b\u5efaMetaData\u5b9e\u4f8b<\/strong><\/h2>\n
metadata = MetaData()<\/p>\n
\u53cd\u6620\u6570\u636e\u5e93\u4e2d\u7684\u8868<\/strong><\/h2>\n
example_table = Table('example_table', metadata, autoload=True, autoload_with=engine)<\/p>\n
\u6267\u884c\u67e5\u8be2<\/strong><\/h2>\n
query = example_table.select()<\/p>\n
result_proxy = connection.execute(query)<\/p>\n
\u6253\u5370\u67e5\u8be2\u7ed3\u679c<\/strong><\/h2>\n
for row in result_proxy:<\/p>\n
    print(row)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u4e0a\u9762\u7684\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u9996\u5148\u521b\u5efa\u4e86\u4e00\u4e2aMetaData\u5b9e\u4f8b\uff0c\u7136\u540e\u4f7f\u7528\u8be5\u5b9e\u4f8b\u53cd\u6620\u6570\u636e\u5e93\u4e2d\u7684\u8868\u3002\u63a5\u7740\uff0c\u6211\u4eec\u6267\u884c\u4e00\u4e2a\u67e5\u8be2\uff0c\u5e76\u6253\u5370\u7ed3\u679c\u3002<\/p>\n<\/p>\n
\u8be6\u7ec6\u63cf\u8ff0\uff1a\u5982\u4f55\u4f7f\u7528SQLAlchemy\u53cd\u6620\u6570\u636e\u5e93\u4e2d\u7684\u8868<\/strong><\/p>\n<\/p>\n
\u53cd\u6620\u6570\u636e\u5e93\u4e2d\u7684\u8868\u662fSQLAlchemy\u4e2d\u4e00\u4e2a\u975e\u5e38\u6709\u7528\u7684\u529f\u80fd\uff0c\u5b83\u5141\u8bb8\u60a8\u4ece\u73b0\u6709\u7684\u6570\u636e\u5e93\u4e2d\u52a0\u8f7d\u8868\u7684\u7ed3\u6784\u3002\u8fd9\u5bf9\u4e8e\u5904\u7406\u73b0\u6709\u6570\u636e\u5e93\u975e\u5e38\u6709\u7528\uff0c\u56e0\u4e3a\u60a8\u65e0\u9700\u624b\u52a8\u5b9a\u4e49\u8868\u7684\u7ed3\u6784\u3002<\/p>\n<\/p>\n
\u4ee5\u4e0b\u662f\u4e00\u4e2a\u66f4\u8be6\u7ec6\u7684\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u4f7f\u7528SQLAlchemy\u53cd\u6620\u6570\u636e\u5e93\u4e2d\u7684\u8868\u5e76\u663e\u793a\u5176\u5185\u5bb9\uff1a<\/p>\n<\/p>\n
from sqlalchemy import create_engine, MetaData, Table<\/p>\n
\u521b\u5efa\u5f15\u64ce<\/strong><\/h2>\n
engine = create_engine('sqlite:\/\/\/example.db')<\/p>\n
\u521b\u5efaMetaData\u5b9e\u4f8b<\/strong><\/h2>\n
metadata = MetaData()<\/p>\n
\u53cd\u6620\u6570\u636e\u5e93\u4e2d\u7684\u8868<\/strong><\/h2>\n
example_table = Table('example_table', metadata, autoload=True, autoload_with=engine)<\/p>\n
\u6267\u884c\u67e5\u8be2<\/strong><\/h2>\n
query = example_table.select()<\/p>\n
result_proxy = engine.execute(query)<\/p>\n
\u6253\u5370\u67e5\u8be2\u7ed3\u679c<\/strong><\/h2>\n
for row in result_proxy:<\/p>\n
    print(row)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u9996\u5148\u521b\u5efa\u4e86\u4e00\u4e2a\u5f15\u64ce\uff0c\u5e76\u8fde\u63a5\u5230\u4e00\u4e2a\u540d\u4e3aexample.db<\/code>\u7684SQLite\u6570\u636e\u5e93\u3002\u63a5\u7740\uff0c\u6211\u4eec\u521b\u5efa\u4e86\u4e00\u4e2aMetaData\u5b9e\u4f8b\uff0c\u5e76\u4f7f\u7528\u5b83\u53cd\u6620\u6570\u636e\u5e93\u4e2d\u7684\u8868\u3002\u7136\u540e\uff0c\u6211\u4eec\u6267\u884c\u4e00\u4e2a\u67e5\u8be2\uff0c\u5e76\u6253\u5370\u7ed3\u679c\u3002<\/p>\n<\/p>\n
\u4e8c\u3001\u4f7f\u7528PyMySQL\u663e\u793a\u6570\u636e\u5e93<\/p>\n<\/p>\n
PyMySQL\u662f\u4e00\u4e2a\u7eafPython\u5b9e\u73b0\u7684MySQL\u5ba2\u6237\u7aef\u5e93\u3002\u5b83\u5141\u8bb8\u60a8\u8fde\u63a5\u5230MySQL\u6570\u636e\u5e93\uff0c\u5e76\u6267\u884c\u67e5\u8be2\u3002<\/p>\n<\/p>\n
1\u3001\u5b89\u88c5PyMySQL\uff1a<\/p>\n
\u9996\u5148\uff0c\u60a8\u9700\u8981\u5b89\u88c5PyMySQL\u3002\u60a8\u53ef\u4ee5\u4f7f\u7528pip\u6765\u5b89\u88c5\u5b83\uff1a<\/p>\n<\/p>\n
pip install pymysql<\/p>\n
<\/code><\/pre>\n<\/p>\n
2\u3001\u8fde\u63a5\u6570\u636e\u5e93\uff1a<\/p>\n
\u63a5\u4e0b\u6765\uff0c\u60a8\u9700\u8981\u8fde\u63a5\u5230\u60a8\u7684MySQL\u6570\u636e\u5e93\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u8fde\u63a5\u5230MySQL\u6570\u636e\u5e93\u7684\u793a\u4f8b\uff1a<\/p>\n<\/p>\n
import pymysql<\/p>\n
\u8fde\u63a5\u5230\u6570\u636e\u5e93<\/strong><\/h2>\n
connection = pymysql.connect(<\/p>\n
    host='localhost',<\/p>\n
    user='your_username',<\/p>\n
    password='your_password',<\/p>\n
    database='your_database'<\/p>\n
)<\/p>\n
<\/code><\/pre>\n<\/p>\n
3\u3001\u663e\u793a\u6570\u636e\u5e93\u5185\u5bb9\uff1a<\/p>\n
\u8981\u663e\u793a\u6570\u636e\u5e93\u4e2d\u7684\u5185\u5bb9\uff0c\u60a8\u9700\u8981\u6267\u884c\u4e00\u4e2a\u67e5\u8be2\uff0c\u5e76\u6253\u5370\u7ed3\u679c\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u67e5\u8be2\u793a\u4f8b\uff1a<\/p>\n<\/p>\n
with connection.cursor() as cursor:<\/p>\n
    # \u6267\u884c\u67e5\u8be2<\/p>\n
    sql = "SELECT * FROM example_table"<\/p>\n
    cursor.execute(sql)<\/p>\n
    # \u83b7\u53d6\u67e5\u8be2\u7ed3\u679c<\/p>\n
    result = cursor.fetchall()<\/p>\n
    # \u6253\u5370\u67e5\u8be2\u7ed3\u679c<\/p>\n
    for row in result:<\/p>\n
        print(row)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u4e0a\u9762\u7684\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u9996\u5148\u8fde\u63a5\u5230MySQL\u6570\u636e\u5e93\uff0c\u7136\u540e\u6267\u884c\u4e00\u4e2a\u67e5\u8be2\uff0c\u5e76\u6253\u5370\u7ed3\u679c\u3002<\/p>\n<\/p>\n
\u4e09\u3001\u4f7f\u7528SQLite3\u663e\u793a\u6570\u636e\u5e93<\/p>\n<\/p>\n
SQLite3\u662f\u4e00\u4e2aC\u5e93\uff0c\u5b83\u5b9e\u73b0\u4e86\u4e00\u4e2a\u81ea\u7ed9\u81ea\u8db3\u3001\u65e0\u670d\u52a1\u5668\u3001\u96f6\u914d\u7f6e\u3001\u4e8b\u52a1\u6027\u7684SQL\u6570\u636e\u5e93\u5f15\u64ce\u3002\u5b83\u5d4c\u5165\u5728Python\u6807\u51c6\u5e93\u4e2d\uff0c\u56e0\u6b64\u60a8\u65e0\u9700\u5b89\u88c5\u4efb\u4f55\u5916\u90e8\u5e93\u3002<\/p>\n<\/p>\n
1\u3001\u8fde\u63a5\u6570\u636e\u5e93\uff1a<\/p>\n
\u4ee5\u4e0b\u662f\u4e00\u4e2a\u8fde\u63a5\u5230SQLite\u6570\u636e\u5e93\u7684\u793a\u4f8b\uff1a<\/p>\n<\/p>\n
import sqlite3<\/p>\n
\u8fde\u63a5\u5230\u6570\u636e\u5e93<\/strong><\/h2>\n
connection = sqlite3.connect('example.db')<\/p>\n
<\/code><\/pre>\n<\/p>\n
2\u3001\u663e\u793a\u6570\u636e\u5e93\u5185\u5bb9\uff1a<\/p>\n
\u8981\u663e\u793a\u6570\u636e\u5e93\u4e2d\u7684\u5185\u5bb9\uff0c\u60a8\u9700\u8981\u6267\u884c\u4e00\u4e2a\u67e5\u8be2\uff0c\u5e76\u6253\u5370\u7ed3\u679c\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u67e5\u8be2\u793a\u4f8b\uff1a<\/p>\n<\/p>\n
cursor = connection.cursor()<\/p>\n
\u6267\u884c\u67e5\u8be2<\/strong><\/h2>\n
cursor.execute("SELECT * FROM example_table")<\/p>\n
\u83b7\u53d6\u67e5\u8be2\u7ed3\u679c<\/strong><\/h2>\n
rows = cursor.fetchall()<\/p>\n
\u6253\u5370\u67e5\u8be2\u7ed3\u679c<\/strong><\/h2>\n
for row in rows:<\/p>\n
    print(row)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u4e0a\u9762\u7684\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u9996\u5148\u8fde\u63a5\u5230SQLite\u6570\u636e\u5e93\uff0c\u7136\u540e\u6267\u884c\u4e00\u4e2a\u67e5\u8be2\uff0c\u5e76\u6253\u5370\u7ed3\u679c\u3002<\/p>\n<\/p>\n
\u56db\u3001\u4f7f\u7528Pandas\u663e\u793a\u6570\u636e\u5e93\u5185\u5bb9<\/p>\n<\/p>\n
Pandas\u662f\u4e00\u4e2a\u5f3a\u5927\u7684\u6570\u636e\u5904\u7406\u5e93\uff0c\u5b83\u5141\u8bb8\u60a8\u8f7b\u677e\u5730\u5904\u7406\u548c\u5206\u6790\u6570\u636e\u3002\u60a8\u53ef\u4ee5\u4f7f\u7528Pandas\u4ece\u6570\u636e\u5e93\u4e2d\u8bfb\u53d6\u6570\u636e\uff0c\u5e76\u5c06\u5176\u663e\u793a\u4e3a\u6570\u636e\u6846\u3002<\/p>\n<\/p>\n
1\u3001\u5b89\u88c5Pandas\uff1a<\/p>\n
\u9996\u5148\uff0c\u60a8\u9700\u8981\u5b89\u88c5Pandas\u3002\u60a8\u53ef\u4ee5\u4f7f\u7528pip\u6765\u5b89\u88c5\u5b83\uff1a<\/p>\n<\/p>\n
pip install pandas<\/p>\n
<\/code><\/pre>\n<\/p>\n
2\u3001\u8fde\u63a5\u6570\u636e\u5e93\u5e76\u8bfb\u53d6\u6570\u636e\uff1a<\/p>\n
\u4ee5\u4e0b\u662f\u4e00\u4e2a\u8fde\u63a5\u5230\u6570\u636e\u5e93\u5e76\u8bfb\u53d6\u6570\u636e\u7684\u793a\u4f8b\uff1a<\/p>\n<\/p>\n
import pandas as pd<\/p>\n
import sqlite3<\/p>\n
\u8fde\u63a5\u5230\u6570\u636e\u5e93<\/strong><\/h2>\n
connection = sqlite3.connect('example.db')<\/p>\n
\u8bfb\u53d6\u6570\u636e<\/strong><\/h2>\n
df = pd.read_sql_query("SELECT * FROM example_table", connection)<\/p>\n
\u663e\u793a\u6570\u636e<\/strong><\/h2>\n
print(df)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u4e0a\u9762\u7684\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u9996\u5148\u8fde\u63a5\u5230SQLite\u6570\u636e\u5e93\uff0c\u7136\u540e\u4f7f\u7528Pandas\u4ece\u6570\u636e\u5e93\u4e2d\u8bfb\u53d6\u6570\u636e\uff0c\u5e76\u5c06\u5176\u663e\u793a\u4e3a\u6570\u636e\u6846\u3002<\/p>\n<\/p>\n
\u4e94\u3001\u4f7f\u7528Django ORM\u663e\u793a\u6570\u636e\u5e93\u5185\u5bb9<\/p>\n<\/p>\n
Django\u662f\u4e00\u4e2a\u9ad8\u5c42\u6b21\u7684Python Web\u6846\u67b6\uff0c\u5b83\u63d0\u4f9b\u4e86\u4e00\u4e2a\u5f3a\u5927\u7684ORM\uff08\u5bf9\u8c61\u5173\u7cfb\u6620\u5c04\uff09\u7cfb\u7edf\uff0c\u5141\u8bb8\u60a8\u4f7f\u7528Python\u5bf9\u8c61\u6765\u7ba1\u7406\u6570\u636e\u5e93\u3002<\/p>\n<\/p>\n
1\u3001\u5b89\u88c5Django\uff1a<\/p>\n
\u9996\u5148\uff0c\u60a8\u9700\u8981\u5b89\u88c5Django\u3002\u60a8\u53ef\u4ee5\u4f7f\u7528pip\u6765\u5b89\u88c5\u5b83\uff1a<\/p>\n<\/p>\n
pip install django<\/p>\n
<\/code><\/pre>\n<\/p>\n
2\u3001\u8bbe\u7f6eDjango\u9879\u76ee\uff1a<\/p>\n
\u63a5\u4e0b\u6765\uff0c\u60a8\u9700\u8981\u521b\u5efa\u4e00\u4e2aDjango\u9879\u76ee\uff0c\u5e76\u8bbe\u7f6e\u6570\u636e\u5e93\u8fde\u63a5\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u793a\u4f8b\uff1a<\/p>\n<\/p>\n
django-admin startproject myproject<\/p>\n
cd myproject<\/p>\n
python manage.py startapp myapp<\/p>\n
<\/code><\/pre>\n<\/p>\n
3\u3001\u5b9a\u4e49\u6a21\u578b\uff1a<\/p>\n
\u5728Django\u4e2d\uff0c\u60a8\u53ef\u4ee5\u5b9a\u4e49\u6a21\u578b\u6765\u8868\u793a\u6570\u636e\u5e93\u4e2d\u7684\u8868\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u793a\u4f8b\u6a21\u578b\uff1a<\/p>\n<\/p>\n
# myapp\/models.py<\/p>\n
from django.db import models<\/p>\n
class ExampleTable(models.Model):<\/p>\n
    column1 = models.CharField(max_length=100)<\/p>\n
    column2 = models.IntegerField()<\/p>\n
<\/code><\/pre>\n<\/p>\n
4\u3001\u663e\u793a\u6570\u636e\u5e93\u5185\u5bb9\uff1a<\/p>\n
\u8981\u663e\u793a\u6570\u636e\u5e93\u4e2d\u7684\u5185\u5bb9\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528Django\u7684ORM\u7cfb\u7edf\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u793a\u4f8b\u89c6\u56fe\uff1a<\/p>\n<\/p>\n
# myapp\/views.py<\/p>\n
from django.shortcuts import render<\/p>\n
from .models import ExampleTable<\/p>\n
def show_data(request):<\/p>\n
    data = ExampleTable.objects.all()<\/p>\n
    return render(request, 'show_data.html', {'data': data})<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u4e0a\u9762\u7684\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u9996\u5148\u5b9a\u4e49\u4e86\u4e00\u4e2a\u6a21\u578b\uff0c\u7136\u540e\u4f7f\u7528Django\u7684ORM\u7cfb\u7edf\u4ece\u6570\u636e\u5e93\u4e2d\u67e5\u8be2\u6570\u636e\uff0c\u5e76\u5c06\u5176\u4f20\u9012\u7ed9\u6a21\u677f\u8fdb\u884c\u663e\u793a\u3002<\/p>\n<\/p>\n
\u516d\u3001\u4f7f\u7528SQL\u8bed\u53e5\u663e\u793a\u6570\u636e\u5e93\u5185\u5bb9<\/p>\n<\/p>\n
SQL\uff08\u7ed3\u6784\u5316\u67e5\u8be2\u8bed\u8a00\uff09\u662f\u7528\u4e8e\u7ba1\u7406\u548c\u64cd\u4f5c\u5173\u7cfb\u6570\u636e\u5e93\u7684\u6807\u51c6\u8bed\u8a00\u3002\u60a8\u53ef\u4ee5\u4f7f\u7528SQL\u8bed\u53e5\u4ece\u6570\u636e\u5e93\u4e2d\u67e5\u8be2\u6570\u636e\uff0c\u5e76\u5c06\u5176\u663e\u793a\u51fa\u6765\u3002<\/p>\n<\/p>\n
1\u3001\u8fde\u63a5\u6570\u636e\u5e93\uff1a<\/p>\n
\u4ee5\u4e0b\u662f\u4e00\u4e2a\u8fde\u63a5\u5230MySQL\u6570\u636e\u5e93\u7684\u793a\u4f8b\uff1a<\/p>\n<\/p>\n
import pymysql<\/p>\n
\u8fde\u63a5\u5230\u6570\u636e\u5e93<\/strong><\/h2>\n
connection = pymysql.connect(<\/p>\n
    host='localhost',<\/p>\n
    user='your_username',<\/p>\n
    password='your_password',<\/p>\n
    database='your_database'<\/p>\n
)<\/p>\n
<\/code><\/pre>\n<\/p>\n
2\u3001\u6267\u884cSQL\u67e5\u8be2\uff1a<\/p>\n
\u8981\u663e\u793a\u6570\u636e\u5e93\u4e2d\u7684\u5185\u5bb9\uff0c\u60a8\u9700\u8981\u6267\u884c\u4e00\u4e2aSQL\u67e5\u8be2\uff0c\u5e76\u6253\u5370\u7ed3\u679c\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u67e5\u8be2\u793a\u4f8b\uff1a<\/p>\n<\/p>\n
with connection.cursor() as cursor:<\/p>\n
    # \u6267\u884c\u67e5\u8be2<\/p>\n
    sql = "SELECT * FROM example_table"<\/p>\n
    cursor.execute(sql)<\/p>\n
    # \u83b7\u53d6\u67e5\u8be2\u7ed3\u679c<\/p>\n
    result = cursor.fetchall()<\/p>\n
    # \u6253\u5370\u67e5\u8be2\u7ed3\u679c<\/p>\n
    for row in result:<\/p>\n
        print(row)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u4e0a\u9762\u7684\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u9996\u5148\u8fde\u63a5\u5230MySQL\u6570\u636e\u5e93\uff0c\u7136\u540e\u6267\u884c\u4e00\u4e2aSQL\u67e5\u8be2\uff0c\u5e76\u6253\u5370\u7ed3\u679c\u3002<\/p>\n<\/p>\n
\u603b\u7ed3<\/p>\n<\/p>\n
\u5728Python\u4e2d\u663e\u793a\u6570\u636e\u5e93\u5185\u5bb9\u6709\u591a\u79cd\u65b9\u6cd5\uff0c\u5305\u62ec\u4f7f\u7528SQLAlchemy\u3001PyMySQL\u3001SQLite3\u3001Pandas\u3001Django ORM\u4ee5\u53ca\u76f4\u63a5\u4f7f\u7528SQL\u8bed\u53e5\u3002\u6bcf\u79cd\u65b9\u6cd5\u90fd\u6709\u5176\u4f18\u70b9\u548c\u9002\u7528\u573a\u666f\uff0c\u60a8\u53ef\u4ee5\u6839\u636e\u5177\u4f53\u9700\u6c42\u9009\u62e9\u5408\u9002\u7684\u65b9\u6cd5\u3002\u4f7f\u7528SQLAlchemy\u8fdb\u884c\u5bf9\u8c61\u5173\u7cfb\u6620\u5c04\u662f\u4e00\u4e2a\u975e\u5e38\u5f3a\u5927\u7684\u65b9\u6cd5\uff0c\u5b83\u5141\u8bb8\u60a8\u4f7f\u7528Python\u5bf9\u8c61\u6765\u7ba1\u7406\u6570\u636e\u5e93\uff0c\u4f7f\u5f97\u4ee3\u7801\u66f4\u52a0\u76f4\u89c2\u548c\u6613\u4e8e\u7ef4\u62a4\u3002<\/strong><\/p>\n<\/p>\n
\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
 \u5728Python\u4e2d\u8fde\u63a5\u6570\u636e\u5e93\u9700\u8981\u54ea\u4e9b\u6b65\u9aa4\uff1f<\/strong>
\u8fde\u63a5\u6570\u636e\u5e93\u901a\u5e38\u9700\u8981\u5b89\u88c5\u76f8\u5e94\u7684\u6570\u636e\u5e93\u9a71\u52a8\u7a0b\u5e8f\uff0c\u5982sqlite3<\/code>\u3001psycopg2<\/code>\uff08\u7528\u4e8ePostgreSQL\uff09\u6216mysql-connector-python<\/code>\uff08\u7528\u4e8eMySQL\uff09\u3002\u4e4b\u540e\uff0c\u5229\u7528\u8fd9\u4e9b\u5e93\u63d0\u4f9b\u7684\u8fde\u63a5\u65b9\u6cd5\uff0c\u901a\u8fc7\u6570\u636e\u5e93\u7684\u5730\u5740\u3001\u7528\u6237\u540d\u548c\u5bc6\u7801\u7b49\u4fe1\u606f\u6765\u5efa\u7acb\u8fde\u63a5\u3002\u8fde\u63a5\u6210\u529f\u540e\uff0c\u53ef\u4ee5\u4f7f\u7528\u76f8\u5e94\u7684\u6e38\u6807\u5bf9\u8c61\u6267\u884cSQL\u67e5\u8be2\u3002<\/p>\n
\u5982\u4f55\u5728Python\u4e2d\u8bfb\u53d6\u548c\u663e\u793a\u6570\u636e\u5e93\u4e2d\u7684\u6570\u636e\uff1f<\/strong>
\u4f7f\u7528Python\u8bfb\u53d6\u6570\u636e\u5e93\u6570\u636e\u65f6\uff0c\u53ef\u4ee5\u6267\u884cSQL\u67e5\u8be2\u5e76\u4f7f\u7528\u6e38\u6807\u5bf9\u8c61\u83b7\u53d6\u7ed3\u679c\u3002\u4f8b\u5982\uff0c\u4f7f\u7528SELECT<\/code>\u8bed\u53e5\u4ece\u8868\u4e2d\u63d0\u53d6\u6570\u636e\uff0c\u5e76\u901a\u8fc7\u6e38\u6807\u7684fetchall()<\/code>\u6216fetchone()<\/code>\u65b9\u6cd5\u83b7\u53d6\u7ed3\u679c\u3002\u4e4b\u540e\uff0c\u5229\u7528\u5faa\u73af\u904d\u5386\u7ed3\u679c\u5e76\u4ee5\u6613\u4e8e\u7406\u89e3\u7684\u683c\u5f0f\u8f93\u51fa\uff0c\u4f8b\u5982\u4ee5\u8868\u683c\u5f62\u5f0f\u6253\u5370\u3002<\/p>\n
\u5728Python\u4e2d\u5904\u7406\u6570\u636e\u5e93\u5f02\u5e38\u7684\u6700\u4f73\u5b9e\u8df5\u662f\u4ec0\u4e48\uff1f<\/strong>
\u5904\u7406\u6570\u636e\u5e93\u5f02\u5e38\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528try-except<\/code>\u8bed\u53e5\u6765\u6355\u83b7\u6f5c\u5728\u7684\u9519\u8bef\uff0c\u5982\u8fde\u63a5\u5931\u8d25\u6216\u67e5\u8be2\u9519\u8bef\u3002\u5728except<\/code>\u5757\u4e2d\uff0c\u53ef\u4ee5\u8bb0\u5f55\u9519\u8bef\u4fe1\u606f\uff0c\u6216\u5411\u7528\u6237\u663e\u793a\u53cb\u597d\u7684\u63d0\u793a\uff0c\u786e\u4fdd\u7a0b\u5e8f\u4e0d\u4f1a\u56e0\u4e3a\u672a\u5904\u7406\u7684\u5f02\u5e38\u800c\u5d29\u6e83\u3002\u8fd9\u79cd\u65b9\u5f0f\u4e0d\u4ec5\u589e\u5f3a\u4e86\u7a0b\u5e8f\u7684\u5065\u58ee\u6027\uff0c\u8fd8\u63d0\u5347\u4e86\u7528\u6237\u4f53\u9a8c\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u5728Python\u4e2d\u663e\u793a\u6570\u636e\u5e93\uff0c\u53ef\u4ee5\u4f7f\u7528\u591a\u79cd\u65b9\u6cd5\uff0c\u5176\u4e2d\u5305\u62ec\u4f7f\u7528SQLAlchemy\u3001PyMySQL\u3001SQLite3 […]","protected":false},"author":3,"featured_media":1059808,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1059791"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=1059791"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1059791\/revisions"}],"predecessor-version":[{"id":1059810,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1059791\/revisions\/1059810"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/1059808"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=1059791"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=1059791"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=1059791"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}