python+sqlalchemy 完成Oracle数据库读写操作

Posted 2020-11-26 havelucky

1.从Oracle中读取数据

1 import pandas as pd 
2 from sqlalchemy import create_engine
3 import os
4 os.environ["NLS_LANG"] = "GERMAN_GERMANY.UTF8"    #解决中文乱码
5 conn_string=‘oracle+cx_oracle://用户名:密码@hostIP:端口号/数据库名‘
6 engine = create_engine(conn_string,echo=True)
7 data=pd.read_sql(sql , con = engine)

2. 向Oracle中写数据

 1 from sqlalchemy import create_engine
 2 import pandas as pd
 3 import os
 4 os.environ[‘NLS_LANG‘] = ‘SIMPLIFIED CHINESE_CHINA.UTF8‘
 5 conn_string=‘oracle+cx_oracle://用户名:密码@IP:端口号/数据库名字‘
 6 engine = create_engine(conn_string, echo=True,encoding=‘utf8‘)
 7 data=pd.Dataframe({‘name‘:[‘lily‘]})
 8 data.to_sql(dbName, con=engine, if_exists=‘replace‘)
 9 
10 sql="SELECT * FROM ISC_USER"  
11 d=engine.execute(sql).fetchmany(1)  #查看数据表
12 print(d)
13 
14 sql="delete from table_name"
15 engine.execute(sql)   # 删除指定表
16   

3. 解决中文乱码问题

import os
os.environ["NLS_LANG"] = "GERMAN_GERMANY.UTF8"    #解决中文乱码