How to automatically update data from the 12 most recent weeks?

Question

I would like to create two dynamic weekly BigQuery Firebase Reports, reflecting the most recent 12 Weeks of data for:

1. Event Occurrences per W

Answer 1

It would be a lot faster if i did not have to manually input the date fields every week), but the script "knows" the week-number we are in, and updates the 12 most recent weeks' data given the week we are in.

Below is for BigQuery Standard SQL

WHERE _TABLE_SUFFIX 
  BETWEEN FORMAT_DATE('%Y%m%d', DATE_SUB(CURRENT_DATE(), INTERVAL 12 * 7 + EXTRACT(DAYOFWEEK FROM CURRENT_DATE()) - 2 DAY)) 
  AND FORMAT_DATE('%Y%m%d', DATE_SUB(CURRENT_DATE(), INTERVAL EXTRACT(DAYOFWEEK FROM CURRENT_DATE()) - 1 DAY))

Below just shows the output

#standardSQL
SELECT 
  FORMAT_DATE('%Y%m%d', DATE_SUB(CURRENT_DATE(), INTERVAL 2 * 7 + EXTRACT(DAYOFWEEK FROM CURRENT_DATE()) - 2 DAY)) first_day,
  FORMAT_DATE('%Y%m%d', DATE_SUB(CURRENT_DATE(), INTERVAL EXTRACT(DAYOFWEEK FROM CURRENT_DATE()) - 1 DAY)) last_day  

-

first_day   last_day     
20171002    20171015       

Whenever you run above script - it will return you the start and end of most recent 12 weeks period

Update for:

I posted my first iteration answer above in what i would want

#standardSQL
SELECT 
  CONCAT(
    FORMAT_DATE('Week %W %d %B %Y, ', first_day),
    FORMAT_DATE('%d %B %Y, ', last_day), 
    FORMAT_DATE('%Y%m%d ', first_day),
    FORMAT_DATE('%Y%m%d', last_day)
  ) wk
FROM (
  SELECT 
    DATE_SUB(CURRENT_DATE(), INTERVAL 1 * 7 + EXTRACT(DAYOFWEEK FROM CURRENT_DATE()) - 2 DAY) first_day,
    DATE_SUB(CURRENT_DATE(), INTERVAL EXTRACT(DAYOFWEEK FROM CURRENT_DATE()) - 1 DAY) last_day 
)

with the output

wk   
Week 41 09 October 2017, 15 October 2017, 20171002 20171015