I only have microsoft office, how can i write code to manipulate relational data sets?
It should be possible to install Python without admin privileges. This has been discussed on Stackoverflow here.

The easiest method appears to be installing Anaconda.

And according to this answer you should also be able to use WSL without admin rights, which will get you bash.

For handling relational data you can use sqlite, which is built-in to Python. For example:

import sqlite3

conn = sqlite3.connect('example.db')
cur = conn.cursor()
cur.execute('''CREATE TABLE users(id INTEGER PRIMARY KEY, name TEXT''')
conn.commit()
conn.close()