Check to see if two SELECT statements are equivalent in SQL

queries_are_equivalent.sql

-- Found this in the following StackOverflow post and found it useful on multiple occasions
-- https://stackoverflow.com/questions/5727882/check-if-two-selects-are-equivalent

WITH query1 AS
(
  -- Copy/paste SELECT statement here
),
query2 AS
(
  -- Copy/paste SELECT statement here
)
select * from (
  (select * from query1 MINUS select * from query2) 
  UNION ALL
  (select * from query2 MINUS select * from query1)
)
;

-- This will result in all rows that are returned by only one of the queries

Link to the original StackOverflow answer: https://stackoverflow.com/a/5728044/10393763