GATE 2006
Which relational algebra operator selects all tuples from relation R that satisfy a specified predicate P?
Consider the following relational schema: • Suppliers(sid:integer, sname:string,city:string ,street:string ) • Parts(pid:integer, …
In SQL, what is the result of evaluating the predicate: NULL = NULL?
Which of the following SQL clauses is used to filter groups formed by a GROUP BY clause?
A prime attribute of a relation schema R is an attribute that:
A transaction schedule that is conflict serializable is always guaranteed to be:
Which of the following relational algebra expressions selects tuples where attribute A is greater than 10 from relation R?
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