Self selection bias.sql

SELECT   quality ,ratio * 100 AS percent,total FROM (
 SELECT quality , count(*) AS total, RATIO_TO_REPORT(total) OVER() AS ratio
 FROM [telegrass_reviews.reviews]
 GROUP by quality
)
SELECT   price ,ratio * 100 AS percent,total FROM (
 SELECT price , count(*) AS total, RATIO_TO_REPORT(total) OVER() AS ratio
 FROM [telegrass_reviews.reviews]
 GROUP by price
)
SELECT   quality  ,ratio * 100 AS percent,total FROM (
 SELECT quality , count(*) AS total, RATIO_TO_REPORT(total) OVER() AS ratio
 FROM [telegrass_reviews.reviews]
 GROUP by quality
)
SELECT   communication   ,ratio * 100 AS percent,total FROM (
 SELECT communication , count(*) AS total, RATIO_TO_REPORT(total) OVER() AS ratio
 FROM [telegrass_reviews.reviews]
 GROUP by communication
)