What is a unique key constraint?


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More SQL Server Interview Questions

Which is better in performance - CONSTRAINT or TRIGGER over a column which restricts say an input of particular value in a column of a table?

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Explain indexes disadvantages?

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What are the encryption mechanisms in sql server?

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Can we use custom code in ssrs?

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Can you give me some DBCC command options?(Database consistency check) - DBCC CHECKDB - Ensures that tables in the db and the indexes are correctly linked.and DBCC CHECKALLOC - To check that all pages in a db are correctly allocated. DBCC SQLPERF - It gives report on current usage of transaction log in percentage. DBCC CHECKFILEGROUP - Checks all tables file group for any damage.

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what are the different ways of moving data/databases between servers and databases in sql server? : Sql server database administration

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What is primary key, unique key, and foreign key?

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When do u use clustered index and non-clustered index?

3 Answers   IBM,


What is sql server programming?

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How to use go command in "sqlcmd"?

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Find columns used in stored procedure?

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What are the recovery models in sql server 2000?

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