select
(case count(*)
when 0 then 1
else max(Document_ID)+1
end ) as maxDocument_Id
from T_Flow_DocumentType
--------------------------------
select decode(count(*),0,1, max(Document_ID)+1) as maxDocument_Id
from T_Flow_DocumentType
(case count(*)
when 0 then 1
else max(Document_ID)+1
end ) as maxDocument_Id
from T_Flow_DocumentType
--------------------------------
select decode(count(*),0,1, max(Document_ID)+1) as maxDocument_Id
from T_Flow_DocumentType
解决方案 »
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