1. SQL / Говнокод #25628

    −2

    1. 01
    2. 02
    3. 03
    4. 04
    5. 05
    6. 06
    7. 07
    8. 08
    9. 09
    10. 10
    11. 11
    12. 12
    13. 13
    14. 14
    15. 15
    SELECT country, QTY, MIN(launched)
FROM (SELECT country, launched, COUNT(name) QTY
 FROM Classes c JOIN 
 Ships s ON c.class = s.class
 GROUP BY country,launched
 HAVING COUNT(name) = (SELECT MAX(qty) 
 FROM (SELECT country,launched,COUNT(name) qty
 FROM Classes c1 JOIN 
 Ships s1 ON c1.class = s1.class
 WHERE country = c.country
 GROUP BY country,launched
 )e
 )
 )T
GROUP BY t.qty, t.country;

    -2 sql ex rating
    я так понял необходимо ещё как-то добавить проверку на NULL?

    Запостил: 5252mmr, 20 Мая 2019

    Комментарии (6) RSS

    Добавить комментарий