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select a.name
from a,b
where a.name=b.name
--2K
SELECT NAME
FROM (
SELECT NAME FROM SYSCOLUMNS WHERE ID=OBJECT_ID('TB1')
UNION ALL
SELECT NAME FROM SYSCOLUMNS WHERE ID=OBJECT_ID('TB2')
) T
GROUP BY NAME
HAVING COUNT(1)=2--05
SELECT NAME FROM SYSCOLUMNS WHERE ID=OBJECT_ID('TB1')
INTERSECT
SELECT NAME FROM SYSCOLUMNS WHERE ID=OBJECT_ID('TB2')
select a.name,count(1) from sys.columns a
inner join sys.indexes b
on a.object_id=b.object_id
group by a.name
having count(1)>1