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Sql distinct vs unique
and mysql
sql distinct vs unique
Unique: helps to ensure that all the values
in a column are different
Distinct: helps to remove all the duplicate
records when retrieving the records from a table.
how to get non distinct values in sql
SELECT [EmailAddress], [CustomerName] FROM [Customers] WHERE [EmailAddress] IN
(SELECT [EmailAddress] FROM [Customers] GROUP BY [EmailAddress] HAVING COUNT(*) > 1)
