How to connect Python to Db2

Question

Is there a way to connect Python to Db2?

Answer 1

You can connect to db2 from python using jaydeapi First install library running pip install jaydeapi download db2jcc4.jar Then you can connect using below code : by passing hostname,portno, userid,password database name

import jaydebeapi

conn_src = jaydebeapi.connect(
    'com.ibm.db2.jcc.DB2Driver',
    ['YourHostName:PortNo/DatabaseName','userid','password'],'C:/db2jcc4.jar'
)

cursor=conn_src.cursor()
sql = 'Select * from schemaname.TableName fetch first 100 rows only '

cursor.execute(sql)
print("fetchall:")
result = cursor.fetchall()
for r in result:
    print(r)

Answer 2

There is a way in which one can connect to IBM db2 using nothing but Python requests library.
Have a look at the following video, found it quite useful:
https://youtu.be/PSNBDwgf9ts
You need nothing but the requests library and your db2 credentials. Worked for me.

Answer 3

You can use ibm_db library to connect DB2.

query_str = "SELECT COUNT(*) FROM table_name"

conn = ibm_db.pconnect("dsn=write","usrname","secret")
query_stmt   = ibm_db.prepare(conn, query_str)
ibm_db.execute(query_stmt)

Answer 4

This is for future reference:

Official installation docs say:

Python 2.5 or later, excluding Python 3.X.

pip install ibm_db

It only worked on Python 2.7 for me; it didn't for 3.X. Also, I had to make Python 2.7 default (instead of Python 3) so that the installation would work (otherwise, there would be installation errors).

Official docs sample usage:

import ibm_db 
ibm_db.connect("DATABASE=name;HOSTNAME=host;PORT=60000;PROTOCOL=TCPIP;UID=username; PWD=password;", "", "")