如果值为零，如何在sql中添加多个sum语句，它将总数量返回到零，如何在多个sum语句中添加

Question

（总和（国民的情况！='沙特'和DIVISION ='达曼中心'和STATUS为空然后（current_salary）结束）） - （总和（国民的情况！='沙特'和DIVISION ='达曼中央'和internal_transfer_from在（'Dammam Central'，'Dammam East'，'Jeddah SMPT'，'Jubail'，'hadeed MTO'，'Hadeed FPH'，'IBN Rushd'）然后（current_salary）结束））+（（总和） NATIONALITY！='Saudi'和internal_transfer_from ='Dammam Central'然后（current_salary）结束）））作为Dammam_Central，

Answer 1

这是你想要的

isnull((sum (case when NATIONALITY != 'Saudi' and DIVISION='Dammam Central' and STATUS is null then (current_salary) end)),0)-
isnull((sum (case when NATIONALITY != 'Saudi' and DIVISION='Dammam Central' and internal_transfer_from in ('Dammam Central','Dammam East','Jeddah SMPT','Jubail','hadeed MTO','Hadeed FPH','IBN Rushd') then (current_salary) end)),0)+
isnull(((sum (case when NATIONALITY != 'Saudi' and internal_transfer_from='Dammam Central' then (current_salary) end))),0) as Dammam_Central,

注意：仅供参考Handling Nulls

Answer 2

使用coalesce（fieldname，0）= casesum（fieldnames）= 0然后sum（）else sum（）结束

以上样本

COALESCE(sum (case when NATIONALITY != 'Saudi' and DIVISION='Dammam Central' and STATUS is null then (current_salary) end)),0)- COALESCE(sum (case when NATIONALITY != 'Saudi' and DIVISION='Dammam Central' and internal_transfer_from in ('Dammam Central','Dammam East','Jeddah SMPT','Jubail','hadeed MTO','Hadeed FPH','IBN Rushd') then (current_salary) end)),0)+(COALESCE(sum (case when NATIONALITY != 'Saudi' and internal_transfer_from='Dammam Central' then (current_salary) end)),0) as Dammam_Central