Можно ли выполнить арифметическую операцию со строками в результатах запроса SQL Server?

Question

У меня есть следующий запрос:

SELECT MATRICULE,ID_POINTAGE,DT_POINTAGE,HH_POINTAGE,CONVERT(VARCHAR,DATEADD(SS,HH_POINTAGE,8),108) GMT,ROW_NUMBER() OVER(PARTITION BY MATRICULE,DT_POINTAGE ORDER BY MATRICULE , DT_POINTAGE) AS NEMRA,CASE WHEN ROW_NUMBER() OVER(PARTITION BY MATRICULE,DT_POINTAGE ORDER BY MATRICULE , DT_POINTAGE) % 2 = 1 THEN 'S' ELSE 'E' END ENTREE_SORTIE FROM POINTAGES WHERE MATRICULE = '0118' AND DT_POINTAGE = '30/10/2019'AND HH_POINTAGE NOT IN ((SELECT MAX(HH_POINTAGE) FROM POINTAGES WHERE MATRICULE = '0118' AND DT_POINTAGE = '30/10/2019'),(SELECT MIN(HH_POINTAGE) FROM POINTAGES WHERE MATRICULE = '0118' AND DT_POINTAGE = '30/10/2019'))

--Formatted Query
SELECT MATRICULE,
       ID_POINTAGE,
       DT_POINTAGE,
       HH_POINTAGE,
       CONVERT(varchar, DATEADD(SS, HH_POINTAGE, 8), 108) AS GMT,
       ROW_NUMBER() OVER (PARTITION BY MATRICULE, DT_POINTAGE ORDER BY MATRICULE, DT_POINTAGE) AS NEMRA,
       CASE
            WHEN ROW_NUMBER() OVER (PARTITION BY MATRICULE, DT_POINTAGE ORDER BY MATRICULE, DT_POINTAGE) % 2 = 1 THEN 'S'
            ELSE 'E'
       END AS ENTREE_SORTIE
FROM POINTAGES
WHERE MATRICULE = '0118'
  AND DT_POINTAGE = '30/10/2019'
  AND HH_POINTAGE NOT IN ((SELECT MAX(HH_POINTAGE)
                           FROM POINTAGES
                           WHERE MATRICULE = '0118'
                             AND DT_POINTAGE = '30/10/2019'), (SELECT MIN(HH_POINTAGE)
                                                               FROM POINTAGES
                                                               WHERE MATRICULE = '0118'
                                                                 AND DT_POINTAGE = '30/10/2019'));

Я получаю эти результаты:

Мой вопрос, если естьВ любом случае я могу выполнить следующую операцию над столбцом HH_POINTAGE: (32820 - 32400) + (42000 - 41400) + (50400 - 43200)

Answer 1

Хммм. ,,Вы, кажется, хотите это на основе четности / нечетности nemra:

with t as (
      <your query here>
     )
select sum(case when nemra % 2 = 1 then hh_pointage
                else - hh_pointage
           end)
from t;