![\"\u5982\u4f55\u5728python\u4e2d\u8bfb\u53d6\u6570\u636e\u5e93\u6570\u636e\u5e93\u6570\u636e\"](\"https:\/\/cdn-kb.worktile.com\/kb\/wp-content\/uploads\/2024\/04\/24180618\/590970cf-01f7-447e-ae0e-f1a9b36c9b2f.webp\")
<\/p>\n<\/p>\n
\u5982\u4f55\u5728Python\u4e2d\u8bfb\u53d6\u6570\u636e\u5e93\u6570\u636e<\/strong><\/p>\n<\/p>\n \u5728Python\u4e2d\u8bfb\u53d6\u6570\u636e\u5e93\u6570\u636e\u7684\u65b9\u6cd5\u6709\u5f88\u591a\uff0c\u4e3b\u8981\u6b65\u9aa4\u5305\u62ec\uff1a\u9009\u62e9\u6570\u636e\u5e93\u9a71\u52a8\u3001\u5efa\u7acb\u6570\u636e\u5e93\u8fde\u63a5\u3001\u6267\u884cSQL\u67e5\u8be2\u3001\u5904\u7406\u67e5\u8be2\u7ed3\u679c<\/strong>\u3002\u4ee5\u4e0b\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u5982\u4f55\u4f7f\u7528Python\u6765\u8bfb\u53d6\u6570\u636e\u5e93\u6570\u636e\u3002<\/p>\n<\/p>\n \u4e00\u3001\u9009\u62e9\u6570\u636e\u5e93\u9a71\u52a8<\/p>\n<\/p>\n Python\u652f\u6301\u591a\u79cd\u6570\u636e\u5e93\u9a71\u52a8\uff0c\u5e38\u89c1\u7684\u6709SQLite\u3001MySQL\u3001PostgreSQL\u3001Oracle\u7b49\u3002\u9009\u62e9\u5408\u9002\u7684\u9a71\u52a8\u7a0b\u5e8f\u662f\u8bfb\u53d6\u6570\u636e\u5e93\u6570\u636e\u7684\u7b2c\u4e00\u6b65\u3002\u4ee5MySQL\u4e3a\u4f8b\uff0c\u63a8\u8350\u4f7f\u7528 \u4e8c\u3001\u5efa\u7acb\u6570\u636e\u5e93\u8fde\u63a5<\/p>\n<\/p>\n \u5efa\u7acb\u6570\u636e\u5e93\u8fde\u63a5\u662f\u8fdb\u884c\u4efb\u4f55\u6570\u636e\u5e93\u64cd\u4f5c\u7684\u524d\u63d0\u3002\u4ee5MySQL\u4e3a\u4f8b\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\u5efa\u7acb\u8fde\u63a5\uff1a<\/p>\n<\/p>\n conn = mysql.connector.connect(<\/p>\n host='localhost',<\/p>\n user='yourusername',<\/p>\n password='yourpassword',<\/p>\n database='yourdatabase'<\/p>\n )<\/p>\n cursor = conn.cursor()<\/p>\n <\/code><\/pre>\n<\/p>\n \u4e09\u3001\u6267\u884cSQL\u67e5\u8be2<\/p>\n<\/p>\n \u8fde\u63a5\u5efa\u7acb\u540e\uff0c\u53ef\u4ee5\u6267\u884cSQL\u67e5\u8be2\u6765\u8bfb\u53d6\u6570\u636e\u3002\u4ee5\u4e0b\u793a\u4f8b\u5c55\u793a\u5982\u4f55\u6267\u884c\u4e00\u4e2a\u7b80\u5355\u7684SELECT\u67e5\u8be2\uff1a<\/p>\n<\/p>\n cursor.execute("SELECT * FROM yourtable")<\/p>\n results = cursor.fetchall()<\/p>\n <\/code><\/pre>\n<\/p>\n \u56db\u3001\u5904\u7406\u67e5\u8be2\u7ed3\u679c<\/p>\n<\/p>\n \u67e5\u8be2\u7ed3\u679c\u53ef\u4ee5\u901a\u8fc7 for row in results:<\/p>\n print(row)<\/p>\n <\/code><\/pre>\n<\/p>\n \u4e94\u3001\u5173\u95ed\u8fde\u63a5<\/p>\n<\/p>\n \u64cd\u4f5c\u5b8c\u6210\u540e\uff0c\u8bb0\u5f97\u5173\u95ed\u6e38\u6807\u548c\u8fde\u63a5\u4ee5\u91ca\u653e\u8d44\u6e90\u3002<\/p>\n<\/p>\n cursor.close()<\/p>\n conn.close()<\/p>\n <\/code><\/pre>\n<\/p>\n \u5728\u9009\u62e9\u6570\u636e\u5e93\u9a71\u52a8\u65f6\uff0c\u9700\u8981\u8003\u8651\u4ee5\u4e0b\u51e0\u70b9\uff1a\u517c\u5bb9\u6027\u3001\u6027\u80fd\u3001\u793e\u533a\u652f\u6301<\/strong>\u3002\u4e0d\u540c\u7684\u6570\u636e\u5e93\u9a71\u52a8\u6709\u4e0d\u540c\u7684\u7279\u70b9\u548c\u9002\u7528\u573a\u666f\u3002<\/p>\n<\/p>\n SQLite\u662f\u4e00\u4e2a\u8f7b\u91cf\u7ea7\u7684\u5d4c\u5165\u5f0f\u6570\u636e\u5e93\uff0c\u9002\u7528\u4e8e\u5c0f\u578b\u5e94\u7528\u548c\u5f00\u53d1\u9636\u6bb5\u3002Python\u5185\u7f6e\u4e86SQLite\u7684\u652f\u6301\uff0c\u65e0\u9700\u989d\u5916\u5b89\u88c5\u3002<\/p>\n<\/p>\n conn = sqlite3.connect('example.db')<\/p>\n cursor = conn.cursor()<\/p>\n <\/code><\/pre>\n<\/p>\n MySQL\u662f\u4e00\u4e2a\u6d41\u884c\u7684\u5f00\u6e90\u5173\u7cfb\u578b\u6570\u636e\u5e93\uff0c\u9002\u7528\u4e8e\u5927\u591a\u6570Web\u5e94\u7528\u3002\u63a8\u8350\u4f7f\u7528 conn = mysql.connector.connect(<\/p>\n host='localhost',<\/p>\n user='yourusername',<\/p>\n password='yourpassword',<\/p>\n database='yourdatabase'<\/p>\n )<\/p>\n cursor = conn.cursor()<\/p>\n <\/code><\/pre>\n<\/p>\n PostgreSQL\u662f\u4e00\u4e2a\u529f\u80fd\u5f3a\u5927\u7684\u5f00\u6e90\u5173\u7cfb\u578b\u6570\u636e\u5e93\uff0c\u9002\u7528\u4e8e\u590d\u6742\u67e5\u8be2\u548c\u9ad8\u5e76\u53d1\u573a\u666f\u3002\u63a8\u8350\u4f7f\u7528 conn = psycopg2.connect(<\/p>\n host='localhost',<\/p>\n user='yourusername',<\/p>\n password='yourpassword',<\/p>\n database='yourdatabase'<\/p>\n )<\/p>\n cursor = conn.cursor()<\/p>\n <\/code><\/pre>\n<\/p>\n Oracle\u662f\u4e00\u4e2a\u5546\u4e1a\u5173\u7cfb\u578b\u6570\u636e\u5e93\uff0c\u9002\u7528\u4e8e\u4f01\u4e1a\u7ea7\u5e94\u7528\u3002\u63a8\u8350\u4f7f\u7528 conn = cx_Oracle.connect('yourusername\/yourpassword@localhost\/yourdatabase')<\/p>\n cursor = conn.cursor()<\/p>\n <\/code><\/pre>\n<\/p>\n \u5efa\u7acb\u6570\u636e\u5e93\u8fde\u63a5\u65f6\uff0c\u9700\u8981\u63d0\u4f9b\u6570\u636e\u5e93\u670d\u52a1\u5668\u5730\u5740\u3001\u7528\u6237\u540d\u3001\u5bc6\u7801\u548c\u6570\u636e\u5e93\u540d\u79f0\u7b49\u4fe1\u606f\u3002\u4e0d\u540c\u7684\u6570\u636e\u5e93\u9a71\u52a8\u6709\u4e0d\u540c\u7684\u8fde\u63a5\u65b9\u5f0f\uff0c\u4f46\u57fa\u672c\u539f\u7406\u76f8\u540c\u3002<\/p>\n<\/p>\n conn = mysql.connector.connect(<\/p>\n host='localhost',<\/p>\n user='yourusername',<\/p>\n password='yourpassword',<\/p>\n database='yourdatabase'<\/p>\n )<\/p>\n cursor = conn.cursor()<\/p>\n <\/code><\/pre>\n<\/p>\n conn = psycopg2.connect(<\/p>\n host='localhost',<\/p>\n user='yourusername',<\/p>\n password='yourpassword',<\/p>\n database='yourdatabase'<\/p>\n )<\/p>\n cursor = conn.cursor()<\/p>\n <\/code><\/pre>\n<\/p>\n \u4e00\u65e6\u5efa\u7acb\u4e86\u6570\u636e\u5e93\u8fde\u63a5\uff0c\u5c31\u53ef\u4ee5\u4f7f\u7528SQL\u67e5\u8be2\u6765\u8bfb\u53d6\u6570\u636e\u3002\u6267\u884c\u67e5\u8be2\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528 cursor.execute("SELECT * FROM yourtable")<\/p>\n results = cursor.fetchall()<\/p>\n <\/code><\/pre>\n<\/p>\n \u6709\u65f6\u9700\u8981\u6267\u884c\u5e26\u53c2\u6570\u7684\u67e5\u8be2\uff0c\u53ef\u4ee5\u4f7f\u7528\u53c2\u6570\u5316\u67e5\u8be2\u6765\u9632\u6b62SQL\u6ce8\u5165\u653b\u51fb\u3002<\/p>\n<\/p>\n sql = "SELECT * FROM yourtable WHERE column1 = %s"<\/p>\n val = ("value1",)<\/p>\n cursor.execute(sql, val)<\/p>\n results = cursor.fetchall()<\/p>\n <\/code><\/pre>\n<\/p>\n \u67e5\u8be2\u7ed3\u679c\u53ef\u4ee5\u901a\u8fc7\u6e38\u6807\u5bf9\u8c61\u7684 for row in results:<\/p>\n print(row)<\/p>\n <\/code><\/pre>\n<\/p>\n \u53ef\u4ee5\u5c06\u67e5\u8be2\u7ed3\u679c\u5b58\u50a8\u5230\u5217\u8868\u3001\u5b57\u5178\u6216\u5176\u4ed6\u6570\u636e\u7ed3\u6784\u4e2d\uff0c\u4ee5\u4fbf\u540e\u7eed\u5904\u7406\u3002<\/p>\n<\/p>\n result_list = []<\/p>\n for row in results:<\/p>\n result_list.append(row)<\/p>\n <\/code><\/pre>\n<\/p>\n \u64cd\u4f5c\u5b8c\u6210\u540e\uff0c\u8bb0\u5f97\u5173\u95ed\u6e38\u6807\u548c\u8fde\u63a5\u4ee5\u91ca\u653e\u8d44\u6e90\u3002\u5173\u95ed\u8fde\u63a5\u53ef\u4ee5\u907f\u514d\u8d44\u6e90\u6cc4\u6f0f\u548c\u5e76\u53d1\u95ee\u9898\u3002<\/p>\n<\/p>\n cursor.close()<\/p>\n conn.close()<\/p>\n <\/code><\/pre>\n<\/p>\n \u4e0b\u9762\u662f\u4e00\u4e2a\u5b8c\u6574\u7684\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u5728Python\u4e2d\u8bfb\u53d6MySQL\u6570\u636e\u5e93\u6570\u636e\u3002<\/p>\n<\/p>\n conn = mysql.connector.connect(<\/p>\n host='localhost',<\/p>\n user='yourusername',<\/p>\n password='yourpassword',<\/p>\n database='yourdatabase'<\/p>\n )<\/p>\n cursor = conn.cursor()<\/p>\n cursor.execute("SELECT * FROM yourtable")<\/p>\n results = cursor.fetchall()<\/p>\n for row in results:<\/p>\n print(row)<\/p>\n cursor.close()<\/p>\n conn.close()<\/p>\n <\/code><\/pre>\n<\/p>\n \u9664\u4e86\u76f4\u63a5\u4f7f\u7528\u6570\u636e\u5e93\u9a71\u52a8\u5916\uff0c\u8fd8\u53ef\u4ee5\u4f7f\u7528ORM\uff08\u5bf9\u8c61\u5173\u7cfb\u6620\u5c04\uff09\u6846\u67b6\u6765\u7b80\u5316\u6570\u636e\u5e93\u64cd\u4f5c\u3002\u5e38\u89c1\u7684ORM\u6846\u67b6\u6709SQLAlchemy\u3001Django ORM\u7b49\u3002<\/p>\n<\/p>\n SQLAlchemy\u662f\u4e00\u4e2a\u5f3a\u5927\u7684ORM\u6846\u67b6\uff0c\u652f\u6301\u591a\u79cd\u6570\u636e\u5e93\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u4f7f\u7528SQLAlchemy\u8bfb\u53d6\u6570\u636e\u5e93\u6570\u636e\u3002<\/p>\n<\/p>\n from sqlalchemy.orm import sessionmaker<\/p>\n from sqlalchemy.ext.declarative import declarative_base<\/p>\n from sqlalchemy import Column, Integer, String<\/p>\n engine = create_engine('mysql+mysqlconnector:\/\/yourusername:yourpassword@localhost\/yourdatabase')<\/p>\n Session = sessionmaker(bind=engine)<\/p>\n session = Session()<\/p>\n Base = declarative_base()<\/p>\n class YourTable(Base):<\/p>\n __tablename__ = 'yourtable'<\/p>\n id = Column(Integer, primary_key=True)<\/p>\n column1 = Column(String)<\/p>\n column2 = Column(String)<\/p>\n results = session.query(YourTable).all()<\/p>\n for row in results:<\/p>\n print(row.id, row.column1, row.column2)<\/p>\n session.close()<\/p>\n <\/code><\/pre>\n<\/p>\n Django ORM\u662fDjango\u6846\u67b6\u5185\u7f6e\u7684ORM\u5de5\u5177\uff0c\u9002\u7528\u4e8eDjango\u9879\u76ee\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u4f7f\u7528Django ORM\u8bfb\u53d6\u6570\u636e\u5e93\u6570\u636e\u3002<\/p>\n<\/p>\n from django.db import models<\/p>\n class YourTable(models.Model):<\/p>\n column1 = models.CharField(max_length=100)<\/p>\n column2 = models.CharField(max_length=100)<\/p>\n from .models import YourTable<\/p>\n def read_data():<\/p>\n results = YourTable.objects.all()<\/p>\n for row in results:<\/p>\n print(row.id, row.column1, row.column2)<\/p>\n <\/code><\/pre>\n<\/p>\n \u8bfb\u53d6\u5927\u91cf\u6570\u636e\u65f6\uff0c\u53ef\u80fd\u4f1a\u9047\u5230\u6027\u80fd\u95ee\u9898\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u6027\u80fd\u4f18\u5316\u7684\u5efa\u8bae\uff1a<\/p>\n<\/p>\n \u5206\u9875\u67e5\u8be2\u53ef\u4ee5\u51cf\u5c11\u6bcf\u6b21\u67e5\u8be2\u7684\u6570\u636e\u91cf\uff0c\u63d0\u9ad8\u67e5\u8be2\u6548\u7387\u3002<\/p>\n<\/p>\n page_size = 100<\/p>\n page_number = 1<\/p>\n while True:<\/p>\n offset = (page_number - 1) * page_size<\/p>\n cursor.execute("SELECT * FROM yourtable LIMIT %s OFFSET %s", (page_size, offset))<\/p>\n results = cursor.fetchall()<\/p>\n if not results:<\/p>\n break<\/p>\n # \u5904\u7406\u7ed3\u679c<\/p>\n for row in results:<\/p>\n print(row)<\/p>\n page_number += 1<\/p>\n <\/code><\/pre>\n<\/p>\n \u4e3a\u5e38\u7528\u7684\u67e5\u8be2\u5b57\u6bb5\u6dfb\u52a0\u7d22\u5f15\uff0c\u53ef\u4ee5\u663e\u8457\u63d0\u9ad8\u67e5\u8be2\u901f\u5ea6\u3002<\/p>\n<\/p>\n <\/code><\/pre>\n<\/p>\n \u6279\u91cf\u5904\u7406\u53ef\u4ee5\u51cf\u5c11\u6570\u636e\u5e93\u4ea4\u4e92\u6b21\u6570\uff0c\u63d0\u9ad8\u5904\u7406\u6548\u7387\u3002<\/p>\n<\/p>\n data = [<\/p>\n ('value1', 'value2'),<\/p>\n ('value3', 'value4'),<\/p>\n # ...<\/p>\n ]<\/p>\n cursor.executemany("INSERT INTO yourtable (column1, column2) VALUES (%s, %s)", data)<\/p>\n conn.commit()<\/p>\n <\/code><\/pre>\n<\/p>\n \u8fde\u63a5\u8d85\u65f6\u53ef\u80fd\u662f\u7531\u4e8e\u7f51\u7edc\u95ee\u9898\u6216\u6570\u636e\u5e93\u670d\u52a1\u5668\u8d1f\u8f7d\u8fc7\u9ad8\u5bfc\u81f4\u7684\u3002\u53ef\u4ee5\u5c1d\u8bd5\u589e\u52a0\u8fde\u63a5\u8d85\u65f6\u65f6\u95f4\u3002<\/p>\n<\/p>\n host='localhost',<\/p>\n user='yourusername',<\/p>\n password='yourpassword',<\/p>\n database='yourdatabase',<\/p>\n connection_timeout=300<\/p>\n )<\/p>\n <\/code><\/pre>\n<\/p>\n SQL\u6ce8\u5165\u662f\u5e38\u89c1\u7684\u5b89\u5168\u95ee\u9898\uff0c\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528\u53c2\u6570\u5316\u67e5\u8be2\u6765\u9632\u6b62\u3002<\/p>\n<\/p>\n sql = "SELECT * FROM yourtable WHERE column1 = %s"<\/p>\n val = ("value1",)<\/p>\n cursor.execute(sql, val)<\/p>\n <\/code><\/pre>\n<\/p>\n \u5b57\u7b26\u7f16\u7801\u95ee\u9898\u53ef\u80fd\u5bfc\u81f4\u6570\u636e\u8bfb\u53d6\u9519\u8bef\uff0c\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u5b57\u7b26\u7f16\u7801\u6765\u89e3\u51b3\u3002<\/p>\n<\/p>\n host='localhost',<\/p>\n user='yourusername',<\/p>\n password='yourpassword',<\/p>\n database='yourdatabase',<\/p>\n charset='utf8mb4'<\/p>\n )<\/p>\n <\/code><\/pre>\n<\/p>\n \u5728Python\u4e2d\u8bfb\u53d6\u6570\u636e\u5e93\u6570\u636e\u6d89\u53ca\u591a\u4e2a\u6b65\u9aa4\uff0c\u5305\u62ec\u9009\u62e9\u6570\u636e\u5e93\u9a71\u52a8\u3001\u5efa\u7acb\u6570\u636e\u5e93\u8fde\u63a5\u3001\u6267\u884cSQL\u67e5\u8be2\u3001\u5904\u7406\u67e5\u8be2\u7ed3\u679c\u548c\u5173\u95ed\u8fde\u63a5\u3002\u9009\u62e9\u5408\u9002\u7684\u6570\u636e\u5e93\u9a71\u52a8\u548cORM\u6846\u67b6\uff0c\u53ef\u4ee5\u7b80\u5316\u6570\u636e\u5e93\u64cd\u4f5c\u5e76\u63d0\u9ad8\u6548\u7387\u3002\u901a\u8fc7\u5408\u7406\u7684\u6027\u80fd\u4f18\u5316\u548c\u5b89\u5168\u63aa\u65bd\uff0c\u53ef\u4ee5\u786e\u4fdd\u6570\u636e\u8bfb\u53d6\u7684\u9ad8\u6548\u6027\u548c\u5b89\u5168\u6027\u3002<\/p>\n<\/p>\n \u5982\u4f55\u5728Python\u4e2d\u8fde\u63a5\u5230\u6570\u636e\u5e93\uff1f<\/strong> \u5728Python\u4e2d\u8bfb\u53d6\u6570\u636e\u5e93\u6570\u636e\u9700\u8981\u4ec0\u4e48\u6743\u9650\uff1f<\/strong> \u5982\u4f55\u5904\u7406\u4ece\u6570\u636e\u5e93\u4e2d\u8bfb\u53d6\u7684\u6570\u636e\uff1f<\/strong>mysql-connector-python<\/code> \u6216 PyMySQL<\/code> \u5e93\u3002<\/p>\n<\/p>\nimport mysql.connector<\/p>\n\u5efa\u7acb\u8fde\u63a5<\/strong><\/h2>\n
\u521b\u5efa\u6e38\u6807\u5bf9\u8c61<\/strong><\/h2>\n
# \u6267\u884c\u67e5\u8be2<\/p>\n\u83b7\u53d6\u67e5\u8be2\u7ed3\u679c<\/strong><\/h2>\n
fetchall()<\/code>\u65b9\u6cd5\u83b7\u53d6\uff0c\u5e76\u8fdb\u884c\u76f8\u5e94\u5904\u7406\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u5c06\u7ed3\u679c\u6253\u5370\u51fa\u6765\uff0c\u6216\u8005\u8fdb\u4e00\u6b65\u5904\u7406\u3001\u5b58\u50a8\u3002<\/p>\n<\/p>\n# \u6253\u5370\u7ed3\u679c<\/p>\n# \u5173\u95ed\u6e38\u6807\u548c\u8fde\u63a5<\/p>\n\u4e00\u3001\u9009\u62e9\u6570\u636e\u5e93\u9a71\u52a8<\/h3>\n<\/p>\n
1. SQLite<\/h4>\n<\/p>\n
import sqlite3<\/p>\n\u5efa\u7acb\u8fde\u63a5<\/strong><\/h2>\n
2. MySQL<\/h4>\n<\/p>\n
mysql-connector-python<\/code> \u6216 PyMySQL<\/code> \u5e93\u3002<\/p>\n<\/p>\nimport mysql.connector<\/p>\n\u5efa\u7acb\u8fde\u63a5<\/strong><\/h2>\n
3. PostgreSQL<\/h4>\n<\/p>\n
psycopg2<\/code> \u5e93\u3002<\/p>\n<\/p>\nimport psycopg2<\/p>\n\u5efa\u7acb\u8fde\u63a5<\/strong><\/h2>\n
4. Oracle<\/h4>\n<\/p>\n
cx_Oracle<\/code> \u5e93\u3002<\/p>\n<\/p>\nimport cx_Oracle<\/p>\n\u5efa\u7acb\u8fde\u63a5<\/strong><\/h2>\n
\u4e8c\u3001\u5efa\u7acb\u6570\u636e\u5e93\u8fde\u63a5<\/h3>\n<\/p>\n
1. MySQL\u8fde\u63a5\u793a\u4f8b<\/h4>\n<\/p>\n
import mysql.connector<\/p>\n\u5efa\u7acb\u8fde\u63a5<\/strong><\/h2>\n
\u521b\u5efa\u6e38\u6807\u5bf9\u8c61<\/strong><\/h2>\n
2. PostgreSQL\u8fde\u63a5\u793a\u4f8b<\/h4>\n<\/p>\n
import psycopg2<\/p>\n\u5efa\u7acb\u8fde\u63a5<\/strong><\/h2>\n
\u521b\u5efa\u6e38\u6807\u5bf9\u8c61<\/strong><\/h2>\n
\u4e09\u3001\u6267\u884cSQL\u67e5\u8be2<\/h3>\n<\/p>\n
execute<\/code> \u65b9\u6cd5\u6765\u6267\u884cSQL\u8bed\u53e5\uff0c\u5e76\u901a\u8fc7\u6e38\u6807\u5bf9\u8c61\u83b7\u53d6\u7ed3\u679c\u3002<\/p>\n<\/p>\n1. \u6267\u884c\u7b80\u5355\u67e5\u8be2<\/h4>\n<\/p>\n
# \u6267\u884c\u67e5\u8be2<\/p>\n\u83b7\u53d6\u67e5\u8be2\u7ed3\u679c<\/strong><\/h2>\n
2. \u6267\u884c\u5e26\u53c2\u6570\u7684\u67e5\u8be2<\/h4>\n<\/p>\n
# \u5e26\u53c2\u6570\u7684\u67e5\u8be2<\/p>\n\u83b7\u53d6\u67e5\u8be2\u7ed3\u679c<\/strong><\/h2>\n
\u56db\u3001\u5904\u7406\u67e5\u8be2\u7ed3\u679c<\/h3>\n<\/p>\n
fetchall<\/code> \u65b9\u6cd5\u83b7\u53d6\uff0c\u5e76\u8fdb\u884c\u76f8\u5e94\u5904\u7406\u3002\u53ef\u4ee5\u5c06\u7ed3\u679c\u6253\u5370\u51fa\u6765\uff0c\u6216\u8005\u8fdb\u4e00\u6b65\u5904\u7406\u3001\u5b58\u50a8\u3002<\/p>\n<\/p>\n1. \u6253\u5370\u67e5\u8be2\u7ed3\u679c<\/h4>\n<\/p>\n
# \u6253\u5370\u7ed3\u679c<\/p>\n2. \u5b58\u50a8\u67e5\u8be2\u7ed3\u679c<\/h4>\n<\/p>\n
# \u5c06\u7ed3\u679c\u5b58\u50a8\u5230\u5217\u8868\u4e2d<\/p>\n\u4e94\u3001\u5173\u95ed\u8fde\u63a5<\/h3>\n<\/p>\n
# \u5173\u95ed\u6e38\u6807\u548c\u8fde\u63a5<\/p>\n\u5b9e\u6218\u793a\u4f8b\uff1a\u8bfb\u53d6MySQL\u6570\u636e\u5e93\u6570\u636e<\/h3>\n<\/p>\n
import mysql.connector<\/p>\n\u5efa\u7acb\u8fde\u63a5<\/strong><\/h2>\n
\u521b\u5efa\u6e38\u6807\u5bf9\u8c61<\/strong><\/h2>\n
\u6267\u884c\u67e5\u8be2<\/strong><\/h2>\n
\u83b7\u53d6\u67e5\u8be2\u7ed3\u679c<\/strong><\/h2>\n
\u6253\u5370\u7ed3\u679c<\/strong><\/h2>\n
\u5173\u95ed\u6e38\u6807\u548c\u8fde\u63a5<\/strong><\/h2>\n
\u9ad8\u7ea7\u7528\u6cd5\uff1a\u4f7f\u7528ORM\u6846\u67b6<\/h3>\n<\/p>\n
1. \u4f7f\u7528SQLAlchemy<\/h4>\n<\/p>\n
from sqlalchemy import create_engine<\/p>\n\u5b9a\u4e49\u6570\u636e\u5e93\u8fde\u63a5<\/strong><\/h2>\n
\u521b\u5efa\u4f1a\u8bdd<\/strong><\/h2>\n
\u5b9a\u4e49\u6a21\u578b<\/strong><\/h2>\n
\u67e5\u8be2\u6570\u636e<\/strong><\/h2>\n
\u6253\u5370\u7ed3\u679c<\/strong><\/h2>\n
\u5173\u95ed\u4f1a\u8bdd<\/strong><\/h2>\n
2. \u4f7f\u7528Django ORM<\/h4>\n<\/p>\n
# models.py<\/p>\nviews.py<\/strong><\/h2>\n
\u6027\u80fd\u4f18\u5316<\/h3>\n<\/p>\n
1. \u5206\u9875\u67e5\u8be2<\/h4>\n<\/p>\n
# \u5206\u9875\u67e5\u8be2<\/p>\n2. \u4f7f\u7528\u7d22\u5f15<\/h4>\n<\/p>\n
CREATE INDEX idx_column1 ON yourtable (column1);<\/p>\n3. \u6279\u91cf\u5904\u7406<\/h4>\n<\/p>\n
# \u6279\u91cf\u63d2\u5165<\/p>\n\u5e38\u89c1\u95ee\u9898\u53ca\u89e3\u51b3\u65b9\u6848<\/h3>\n<\/p>\n
1. \u8fde\u63a5\u8d85\u65f6<\/h4>\n<\/p>\n
conn = mysql.connector.connect(<\/p>\n2. SQL\u6ce8\u5165<\/h4>\n<\/p>\n
# \u5e26\u53c2\u6570\u7684\u67e5\u8be2<\/p>\n3. \u5b57\u7b26\u7f16\u7801\u95ee\u9898<\/h4>\n<\/p>\n
conn = mysql.connector.connect(<\/p>\n\u603b\u7ed3<\/h3>\n<\/p>\n
\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
\u5728Python\u4e2d\u8fde\u63a5\u5230\u6570\u636e\u5e93\u901a\u5e38\u9700\u8981\u4f7f\u7528\u76f8\u5e94\u7684\u6570\u636e\u5e93\u9a71\u52a8\u7a0b\u5e8f\u3002\u4f8b\u5982\uff0c\u5bf9\u4e8eMySQL\uff0c\u53ef\u4ee5\u4f7f\u7528mysql-connector-python<\/code>\uff0c\u800c\u5bf9\u4e8eSQLite\uff0c\u53ef\u4ee5\u4f7f\u7528\u5185\u7f6e\u7684sqlite3<\/code>\u6a21\u5757\u3002\u8fde\u63a5\u7684\u57fa\u672c\u6b65\u9aa4\u5305\u62ec\u5bfc\u5165\u5e93\u3001\u521b\u5efa\u8fde\u63a5\u5bf9\u8c61\uff0c\u5e76\u4f7f\u7528\u8be5\u5bf9\u8c61\u83b7\u53d6\u4e00\u4e2a\u6e38\u6807\u6765\u6267\u884cSQL\u67e5\u8be2\u3002<\/p>\n
\u4e3a\u4e86\u6210\u529f\u8bfb\u53d6\u6570\u636e\u5e93\u6570\u636e\uff0c\u7528\u6237\u9700\u8981\u5177\u5907\u76f8\u5e94\u7684\u8bbf\u95ee\u6743\u9650\u3002\u8fd9\u901a\u5e38\u5305\u62ecSELECT\u6743\u9650\uff0c\u4ee5\u4fbf\u80fd\u591f\u67e5\u8be2\u6570\u636e\u3002\u6b64\u5916\uff0c\u5177\u4f53\u7684\u6743\u9650\u8bbe\u7f6e\u53ef\u80fd\u4f9d\u8d56\u4e8e\u6570\u636e\u5e93\u7ba1\u7406\u7cfb\u7edf\uff08DBMS\uff09\u7684\u914d\u7f6e\uff0c\u786e\u4fdd\u7528\u6237\u89d2\u8272\u5728\u6570\u636e\u5e93\u4e2d\u5177\u5907\u6240\u9700\u7684\u6743\u9650\u3002<\/p>\n
\u4ece\u6570\u636e\u5e93\u4e2d\u8bfb\u53d6\u7684\u6570\u636e\u901a\u5e38\u4f1a\u4ee5\u8868\u683c\u7684\u5f62\u5f0f\u8fd4\u56de\uff0c\u4f7f\u7528\u6e38\u6807\u7684fetchall()<\/code>\u6216fetchone()<\/code>\u65b9\u6cd5\u53ef\u4ee5\u83b7\u53d6\u8fd9\u4e9b\u6570\u636e\u3002\u53ef\u4ee5\u5c06\u7ed3\u679c\u5b58\u50a8\u5728\u5217\u8868\u6216\u5b57\u5178\u4e2d\uff0c\u4ee5\u4fbf\u540e\u7eed\u5904\u7406\u548c\u5206\u6790\u3002\u5bf9\u4e8e\u5927\u578b\u6570\u636e\u96c6\uff0c\u8003\u8651\u4f7f\u7528\u6570\u636e\u6846\u67b6\u5982Pandas\uff0c\u53ef\u4ee5\u65b9\u4fbf\u5730\u8fdb\u884c\u6570\u636e\u5206\u6790\u548c\u53ef\u89c6\u5316\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u5982\u4f55\u5728Python\u4e2d\u8bfb\u53d6\u6570\u636e\u5e93\u6570\u636e \u5728Python\u4e2d\u8bfb\u53d6\u6570\u636e\u5e93\u6570\u636e\u7684\u65b9\u6cd5\u6709\u5f88\u591a\uff0c\u4e3b\u8981\u6b65\u9aa4\u5305\u62ec\uff1a\u9009\u62e9\u6570\u636e\u5e93\u9a71\u52a8\u3001 […]","protected":false},"author":3,"featured_media":1142603,"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\/1142597"}],"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=1142597"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1142597\/revisions"}],"predecessor-version":[{"id":1142605,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1142597\/revisions\/1142605"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/1142603"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=1142597"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=1142597"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=1142597"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}