Найти совпадения записей в двух базах SQLite3

import sqlite3
 
base = sqlite3.connect('home_name .db')
cur = base.cursor()
x = cur.execute('SELECT home_courses FROM home_name').fetchall()
print(x, '\n\n\n')
 
base = sqlite3.connect('folding_courses .db')
cur = base.cursor()
y = cur.execute('SELECT clubbing_on_courses FROM course_name').fetchall()
print(y, '\n\n\n')
 
for user in y:
        for item in user:
            for i in x:
                exist = "{}".format(i[0]) in item
                if exist == True:
                    await ctx.send('Найдено совпадение {}'.format(i[0]))

import sqlite3 as sq
 
with sq.connect("home_courses.db") as con:
    cur = con.cursor()
 
    x = cur.execute('SELECT home_name FROM home_courses').fetchall()
    print(x, '\n\n\n')
 
#base = sqlite3.connect('folding_courses .db')
#cur = base.cursor()
y = cur.execute('SELECT clubbing_on_courses FROM course_name').fetchall()
print(y, '\n\n\n')
 
for user in y:
    for item in user:
        for i in x:
            exist = "{}".format(i[0]) in item

ef write_sqlite3(data):
    base = sqlite3.connect('folding_courses .db')
    cur = base.cursor()
 
    base.execute(
        'CREATE TABLE IF NOT EXISTS clubbing_on_courses (id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, course_name TEXT NOT NULL UNIQUE, author TEXT NOT NULL)')
    base.commit()