表SECURITYGROUPSID：
GROUPNAME | SIDNAME
--------------------------
Group 1 Apple
Group 1 Apples
Group 1 Applesauce
Group 1 Applesauces
Group 1 Appleton
Group 2 Apple
Group 2 Applesauce
Group 2 Appleton
对于像'Apple％'这样的值，我需要第1组和第2组之间SIDNAME值的差异。例如，如果我执行以下2个查询，我需要在底部进行结果查询。
SELECT SIDNAME FROM SECURITYGROUPSID WHERE GROUPNAME = 'Group 1' AND SIDNAME LIKE 'Apple%';
SELECT SIDNAME FROM SECURITYGROUPSID WHERE GROUPNAME = 'Group 2' AND SIDNAME LIKE 'Apple%';
结果查询应该是： 苹果 Applesauces
答案 0 :(得分：2)
使用__accepted_types
not exists()或使用select o.sidname
from securitygroupsid o
where o.groupname = 'Group 1'
and o.sidname like 'Apple%'
and not exists (
select 1
from securitygroupsid i
where i.groupname = 'Group 2'
and i.sidname = o.sidname
)
not in()或select o.sidname
from securitygroupsid o
where o.groupname = 'Group 1'
and o.sidname like 'Apple%'
and o.sidname not in (
select i.sidname
from securitygroupsid i
where i.groupname = 'Group 2'
and i.sidname like 'Apple%'
)
left join答案 1 :(得分：1)
只需在查询之间添加except（SqlServer）即可。 （或MINUS for Oracle）
SELECT SIDNAME FROM SECURITYGROUPSID WHERE GROUPNAME = 'Group 1' AND SIDNAME LIKE 'Apple%';
EXCEPT
SELECT SIDNAME FROM SECURITYGROUPSID WHERE GROUPNAME = 'Group 2' AND SIDNAME LIKE 'Apple%';