如何求和union查詢結果？

Question

直升機， 我曾查詢是這樣的：

SELECT 
if (cf_1095-accountingpaidamount>0,FORMAT(cf_1095-accountingpaidamount, 0, 'de_DE'),0) as Kurang_Gesek 

FROM vtiger_servicecontracts, vtiger_crmentity, vtiger_servicecontractscf, vtiger_campaign, vtiger_contactdetails, vtiger_accounting, vtiger_accounting_payments 

WHERE 
vtiger_accounting_payments.idtransaction=vtiger_accounting.accountingid 
and 
vtiger_accounting.accountingrelated2=vtiger_servicecontracts.servicecontractsid 
and 
vtiger_contactdetails.contactid=vtiger_servicecontracts.contactid and 
vtiger_campaign.campaignid=cf_1155 
and vtiger_crmentity.crmid=vtiger_servicecontracts.servicecontractsid 
and vtiger_servicecontractscf.servicecontractsid=vtiger_servicecontracts.servicecontractsid 
and accountingtype="Pelunasan Gesek" 
group by campaignname 

UNION 

SELECT 
if (cf_1095>0,FORMAT(cf_1095, 0, 'de_DE'),0) as Kurang_Gesek 

FROM vtiger_servicecontracts, vtiger_crmentity, vtiger_servicecontractscf, vtiger_campaign, vtiger_contactdetails, vtiger_accounting, vtiger_accounting_payments 

WHERE 
vtiger_accounting_payments.idtransaction=vtiger_accounting.accountingid 
and 
vtiger_accounting.accountingrelated2=vtiger_servicecontracts.servicecontractsid 
and 
vtiger_contactdetails.contactid=vtiger_servicecontracts.contactid and 
vtiger_campaign.campaignid=cf_1155 
and vtiger_crmentity.crmid=vtiger_servicecontracts.servicecontractsid 
and vtiger_servicecontractscf.servicecontractsid=vtiger_servicecontracts.servicecontractsid 

and accountingpaidamount=accountingamount 

group by campaignname 
having length(GROUP_CONCAT(accountingtype SEPARATOR " "))=12 

什麼，我試圖達到在上面的查詢顯示列Kurang_Gesek的SUM結果..

誰能幫助？

由於之前...

Answer 1

所以只是另一個SELECT包裹查詢：

SELECT t. *, SUM(t.Kurang_Gesek) 
FROM (
SELECT 
... 
UNION 
... 
) t 
GROUP BY t.some_column_you_need 

Answer 2

嘗試使用子查詢：

select sum(Kurang_Gesek) 
from (<your query here>) q