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Hello, during the summer I'll have to pick a dissertation subject for my CS bachelor, and all I know is that I'm interested in databases. So if someone has experience, I would like some abstract proposals. Thank you. 
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Hello, I know relational algebra uses sets which eliminates duplicates values but I'm not sure about one thing. Duplicate values are impossible to exist in a relation ever? For example I can never have a relation R(A,B) with values (1,2),(1,2) ? Or they get eliminated <b>after</b> a projection or selection, …
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Hello, I'm new to C++ with a fair experience in java. I would like to know the difference between [CODE]Ob o* = new Ob();[/CODE] and [CODE]Ob o = new Ob();[/CODE] I know the first allocates a block of memory and creates a pointer which keeps the address of this block. … 
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