在orden中重寫查詢以避免某些記錄

Question

我不知道如何重寫查詢以避免ISPRIMARY = 0的記錄。換句話說，允許的值必須是ISPRIMARY = 1和ISPRIMARY = NULL。

查詢是下一個：

select 
    S.assetnum, S.description, S.serialnum, 
    S.epp_codactfij, S.location, L.description, 
    S.EPP_NUMCONTRATO, S.PURCHASEPRICE, U.personid, U.isprimary 
from maximo.asset S 
left join maximo.locations L on S.location=L.location 
left join maximo.assetusercust U on S.assetnum=U.assetnum 
where 
S.siteid ='TI' 
order by S.assetnum 

Answer 1

select 
    S.assetnum, S.description, S.serialnum, S.epp_codactfij, 
    S.location, L.description, S.EPP_NUMCONTRATO, 
    S.PURCHASEPRICE, U.personid, U.isprimary 
from maximo.asset S 
left join maximo.locations L on S.location=L.location 
left join maximo.assetusercust U on S.assetnum=U.assetnum 
WHERE S.siteid ='TI' AND (U.isprimary = 1 OR U.isprimary IS NULL) 
order by S.assetnum; 

或：

select 
    S.assetnum, S.description, S.serialnum, S.epp_codactfij, 
    S.location, L.description, S.EPP_NUMCONTRATO, 
    S.PURCHASEPRICE, U.personid, U.isprimary 
from maximo.asset S 
left join maximo.locations L on S.location=L.location 
left join maximo.assetusercust U on S.assetnum=U.assetnum 
WHERE S.siteid ='TI' AND (U.isprimary <> 0 OR U.isprimary IS NULL) 
order by S.assetnum; 

Answer 2

嘗試添加以下行WHERE條款：

select 
S.assetnum, S.description, S.serialnum, S.epp_codactfij, S.location, L.description, S.EPP_NUMCONTRATO, S.PURCHASEPRICE, U.personid, U.isprimary 
from maximo.asset S 
left join maximo.locations L on S.location=L.location 
left join maximo.assetusercust U on S.assetnum=U.assetnum 
where 
S.siteid ='TI' 
-- add this line 
AND (U.isprimary = 1 OR U.isprimary IS NULL) 
order by S.assetnum