what is difference between "Primary key" and "Unique key"?

4 Answers   PreVator,

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What is union and union all keyword in sql and what are their differences?

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What is a full join?

0 Answers  

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wt is the diff b/w greast and max ,least and min? wt is the diff b/w case and decod?

4 Answers   Oracle, TCS, Tecnics,

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how many groups of data types? : Sql dba

0 Answers  

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Is it possible to remove child records without removing master table records...the two having pk,fk relationship?

0 Answers  

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How One can easily select all even, odd, or Nth rows from a table using SQL queries?

4 Answers  

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how to find the second highest salary from emp table?

211 Answers   CIS, Cognizant, Cosmosoft, DAS, EDS, GreenTech, HOV Services, IBM, Infosys, National Institute of Science and Technology, Patni, Persistent, Polaris, TCS, Wipro, Yardi, Zensar,

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What is dense_rank in sql?

0 Answers  

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What is $$ in sql?

0 Answers  

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How to fetch alternate records from a table?

0 Answers  

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What is vector point function?

0 Answers  

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