Can we use more than one null value for unique key?

31 Answers   A1 Technology, Wipro,

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How would you reference column values before and after you have inserted and deleted triggers?

0 Answers  

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What is the purpose of a sql?

0 Answers  

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i have a table like this. i want to output like this c1 c2 c1 c2 1 10 1 10 2 20 2 30 3 30 3 60 4 40 4 100 5 5 5 105 c1 and c2 are columns in a table .i want output like this c2 values are 10,10+20,10+20+30,10+20+30+40.10+20+30+40+5. write a sql query.pls help this i want urgent.

2 Answers   IBM, Loginworks, OFSS,

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Define sql delete statement.

0 Answers  

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What is data modelling in sql?

0 Answers  

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What are the different ways to optimize a sql query?

0 Answers  

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what is indexing, searching and user interface?

1 Answers   HCL,

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What is sql exception?

0 Answers  

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What is sql catalog?

0 Answers  

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What is cursor in pl sql with examples?

0 Answers  

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what is a primary key? : Sql dba

0 Answers  

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