Python使用pymssql连接SQL SEVER数据库全流程

pip install pymssql

import pymssql

server = '(local)'
database = '订单信息'
username = 'sa'
password = '123456'
# 连接到数据库
conn = pymssql.connect(server=server, user=username, password=password, database=database,tds_version="7.0")#最后一个参数不是必须的
# 创建游标对象
cursor = conn.cursor()
print('连接成功！')
# 关闭数据库连接
conn.close()

#coding=utf-8
import time
import pymssql
import pandas as pd

def insert_data_to_sql(df, server, database, username, password, table_name,mode='Overlay'):
    # 连接到数据库
    conn = pymssql.connect(server=server, user=username, password=password, database=database)
    # 创建游标对象
    cursor = conn.cursor()
    # 获取 DataFrame 对象的字段名和数据类型
    columns = list(df.columns)
    dtypes = df.dtypes
    if mode=='Overlay':
        try:
        #覆盖模式
            cursor.execute("DROP TABLE {}".format(table_name))
        except:
            print('表不存在，直接创建……')
        # 构造创建表的 SQL 语句
        create_table_sql = f'CREATE TABLE [{table_name}] ('
        for col_name, col_type in zip(columns, dtypes):
            if col_type == 'int64':
                create_table_sql += f'[{col_name}] BIGINT,'
            elif col_type == 'float64':
                create_table_sql += f'[{col_name}] FLOAT,'
            elif col_type== 'datetime64[ns]' or '时间' in col_name or '日期' in col_name:
                create_table_sql += f'[{col_name}] DATETIME2(0),'
            elif col_type == 'date':
                create_table_sql += f'[{col_name}] DATE,'
            else:
                create_table_sql += f'[{col_name}] NVARCHAR(max),'
        create_table_sql = create_table_sql.rstrip(',') + ');'
        cursor.execute(create_table_sql)
    # 将 DataFrame 转换成元组列表
    data = [tuple(row) for row in df.fillna(0).values.tolist()]
    # 构造插入数据的 SQL 语句
    insert_sql = f'INSERT INTO [{table_name}] ('
    insert_sql += ','.join([f'[{col_name}]' for col_name in columns]) + ') VALUES ('
    insert_sql += ','.join(['%s'] * len(columns)) + ');'

    # 将数据插入到数据库
    cursor.executemany(insert_sql, data)
    # 提交事务
    conn.commit()
    # 关闭数据库连接
    conn.close()
   # 数据库连接参数