Why is a primary key important?

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What is the use of double ampersand (&&) in sql queries? Give an example

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What is the difference between explicit and implicit cursors in oracle?

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When do we use triggers?

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how to retrieve the top 2 salaried persons from a database?

7 Answers   Orion Laboratories,

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what are myisam tables? : Sql dba

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Is sql a dbms?

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Can we want to pass a parameter payroll_id to this external pl/sql function, how do we do it?

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What is the difference between union and union all command?

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I i have 2 tables A & B ,A contains 10 records B contains 20 records ,what w'll be the o/p if we perform equijoin,outer join,right outer join,left outer join,full outer join,cross join seperately Can anyone help on this?

2 Answers  

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which tcp/ip port does sql server run on? : Sql dba

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What does inner join mean?

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