check whether all the emp numbers are indeed unique.

6 Answers  

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What is pl sql code?

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What is the use of desc in sql?

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Why do we need pl sql?

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How do I truncate a word?

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Do stored procedures prevent sql injection?

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What is the main difference between a UNION statement and a UNION ALL statement? 1. A UNION statement eliminates duplicate rows; a UNION ALL statement includes duplicate rows. 2. A UNION statement can be used to combine any number of queries; a UNION ALL statement can be used to combine a maximum of two queries. 3. A UNION statement can only combine queries that have parallel fields in the SELECT list; a UNION ALL statement can combine queries with differing SELECT list structures. 4. A UNION statement cannot be used with aggregate functions; a UNION ALL statement can be used with aggregate functions. 5. There is no difference between the two statements; they are interchangeable.

2 Answers   Saman Bank, Sonata,

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List the various privileges that a user can grant to another user?

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how to insert the records in particular position

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How global cursor can be declare with dynamic trigger ?

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Explain the difference between sql and mysql.

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how does a local variable is defined using t-sql? : Transact sql

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