?? exists-top.sql
字號:
/*
if exists(select * from Region where RegionID = 5)
begin
update Region set RegionDescription = 'EastSouth' where RegionID = 5
end
else
begin
insert into Region(RegionID, RegionDescription) values(5, 'Middle')
end
*/
select top 20 * from Orders order by OrderID desc
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