How to insert a 15 minute time slot for every day of the year

Question

I'm trying to create a database thta reflects a customisable stock level for every 15 minute window for an entire year.

My database structure looks like this:

time_period	day	month	stock
00:00	1	1	20
00:15	1	1	15
....	...	...	...
23:45	1	1	0
00:00	2	1	20
....	...	...	...
23:45	31	12	0

So in total there would be 96 * 366 = 35,136 rows in this particular table that I want to insert. The time_period increments every 15 minutes (96 slots per day) for 266 days of the year.

Are there any ways to easily insert this data using a mySQL query or a loop?

So far the best option I've come up with is to manually generate the data into a JSON or CSV file and then import to the DB FROM FILE - it seems like there should be an easier way to do this though?

EDIT: Attempted using Recursive Common Table Expressions as suggested by a commenter. My DB is running mySQL 5.7 so unfortunately this isn't an option

Answer 1

It would be quicker and easier to write a script to just insert 35,040 rows in a loop:

import datetime
import mysql.connector

cnx = mysql.connector.connect(user='root', password='xxxxxxxx', database='test')
cursor = cnx.cursor(prepared=True)

stmt = """INSERT INTO MyTable SET t = %s"""

time = datetime.datetime(2023, 1, 1, 0, 0, 0)
end = datetime.datetime(2024, 1, 1, 0, 0, 0)

while time < end:
    cursor.execute(stmt, (time,))
    time += datetime.timedelta(minutes=15)

cnx.commit()