मुझे लगता है कि मुख्य विचार उन प्रिंटरों की सूची प्राप्त करना है जो आप चाहते हैं:
select PrinterGUID
from ((select cm.PrinterGUID
from computermapping cm
where cm.ComputerGUID = '5bec3779-b002-46ba-97c4-19158c13001f'
) union -- to remove duplicates
(select PrinterGUID
from usermapping um
where um.UserGUID = 'd3cf699b-8d71-4dbc-92f3-402950042054'
)
) p;
तब आप exists
. का उपयोग कर सकते हैं यह देखने के लिए कि क्या ये डिफ़ॉल्ट हैं:
select p.PrinterGUID,
(exists (select 1
from computerdefaultprinter cdp
where cdp.PrinterGUID = p.PrinterGUID and
cdp.ComputerGUID = '5bec3779-b002-46ba-97c4-19158c13001f'
)
) as is_computer_default,
(exists (select 1
from userdefaultprinter udp
where udp.PrinterGUID = p.PrinterGUID AND
udp.UserGUID = 'd3cf699b-8d71-4dbc-92f3-402950042054'
)
) as is_user_default
from ((select cm.PrinterGUID
from computermapping cm
where cm.ComputerGUID = '5bec3779-b002-46ba-97c4-19158c13001f'
) union -- to remove duplicates
(select PrinterGUID
from usermapping um
where um.UserGUID = 'd3cf699b-8d71-4dbc-92f3-402950042054'
)
) p;
यहां एक डीबी<>बेला है।