mainly uses the two libraries SQLAlchemy and PyMySQL integrated in Python to add new row records to the database. SQLAlchemyProvides Python with a unified interface for different databases, which can be used to connect to most common databases, such as Postges, MySQL, SQLite, Oracle, etc. PyMySQL is a library used in Python3.x version to connect to the MySQL server.
1. Add new records to the table
import pandas as pd
from sqlalchemy import create_engine
import pymysql
engine=create_engine(r"mysql+pymysql://root:[email protected]:3301/database_name")#root:[email protected]:3301/database_name 用户名:密码@ip地址:端口号/表名称
data_sale.to_sql('table_name_1',engine,if_exists='append',index= False)#向table_name_1表中新增data_sale记录，非覆盖新增
data_order.to_sql('table_name_2',engine,if_exists='append',index= False)#向table_name_2表中新增data_order记录，非覆盖新增
2. Execute the query statement
sql='''
select * from table_name_1
'''
df = pd.read_sql_query(sql, engine)#执行查询语句并将查询结果赋值给df