Q

找出冗餘

sql

2011-03-09 175 views 1 likes

1

我有一個外部表...我想看看對應於外部列的冗餘行以及冗餘的數量。找出冗餘

2011-03-09 Rahul Biswas

A

回答

3

select foriegn_column_name,COUNT(foriegn_column_name) from table_name 
group by foriegn_column_name 
having COUNT(foriegn_column_name) > 1

2011-03-09 10:17:30

+0

偉大的作品......... – 2011-03-09 10:24:34

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