SQL 同表多列查询where子句

Question

Having the below database:

Trying to execute below query:

select * 
from data_five_minutes 
where ((open in (select open 
                 from data_five_minutes 
                 where date_time = '2019-01-02 13:15:00')) > 
        (open in (select open 
                  from data_five_minutes 
                  where date_time = '2019-01-01 11:10:00')))

The above query gives me result give me 3 results but I was expecting 0!

What I try to fetch is:- get the row where the open of 02/01 13:15 > open of 01/01 11:10 having script_id same for both.

Answer 1

You can use EXISTS :

SELECT d1.* 
FROM data_five_minutes d1 
WHERE d1.date_time = '2019-01-02 13:15:00'
  AND EXISTS (
    SELECT 1
    FROM data_five_minutes d2
    WHERE d2.date_time = '2019-01-01 11:10:00'
      AND d2.script_id = d1.script_id
      AND d2.open < d1.open
  );