SQL Interview Questions and Answers Videos

All SQL Interview Videos Playlist

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What is the difference between COUNT(*) vs COUNT(1) vs COUNT(col) and COUNT(*) vs COUNT_BIG(*) in SQL?

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What is the difference between INSERT INTO and SELECT INTO Clause in SQL?

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What is the difference between WHERE and HAVING Clause in SQL?

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What are the difference ways to delete duplicate records in SQL?

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What is the difference between ROW_NUMBER, RANK, and DENSE_RANK functions in SQL?

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How can you get the 3rd highest salary in SQL?

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What is the difference between ISNULL and COALESCE in SQL?

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What is the difference between LEN() and DATALENGTH() in SQL?

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What is the difference between DELETE and TRUNCATE commands in MS SQL?

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What is the difference between UNION and UNION ALL in MS SQL?

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What is the difference between FULL JOIN and CROSS JOIN in SQL?

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What is the difference between IN() and NOT IN() operators in SQL?

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What is the difference between the ON clause and WHERE clause in SQL?

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What is the difference between INNER JOIN and LEFT OUTER JOIN with WHERE condition in SQL?

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What is the difference between INNER JOIN, IN() and EXISTS() operator in MS SQL?

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What is the difference between SubQuery and Co-Related SubQuery in MS SQL?

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What is the difference between INTERSECT and EXCEPT SubQuery in MS SQL?

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