What is the difference between unique and primary key constraints?

0 Answers  

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.  have a tablle like this: cust acc ----------- a 1 b 2 b 3 c 4 c 5 c 6 I Want below o/p: cust acc --------------- a 1 b 2|3 c 4|5|6 Please any one can you have any ideas share me. I have urgent requirement. CUST         ACC a            dv b            fg b            bh c            mk c            cl c            so result:- A  B   c dv fg mk    bh cl       so

3 Answers  

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Is hadoop a nosql?

0 Answers  

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suppose I have two table one Emp and other is dpt. Emp table has a field ,dept id,name ,sal and dpt table has a field dept id,dept name. Now I want to find out the emplyee list whose sal is between 2000-3000 from dept x.

7 Answers   Geometric Software, IBM,

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

4 Answers   PreVator,

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How many clustered indexes can you have?

0 Answers  

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How will you debug your procedure? If your procedure is around 2000 lines and the expected output is 10 and we get only output 5.So how will you debug it? Somebody pls give the correct answer?

2 Answers   Fidelity,

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column A column b | output 10 7 | 10 5 8 | 8 7 -9 | 7 3 5 | 5 0 6 | 6 Write a sql query to print such output.

4 Answers  

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How many types of primary keys are there?

0 Answers  

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Why use subqueries instead of joins?

0 Answers  

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Can a select statement fire a trigger?

0 Answers  

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what are the demerits of sql?

1 Answers  

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