define an operator that a relational algebra does
Define an operator that a Relational Algebra does not have
Ans: Relational Algebra does not have Aggregation operators.
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1 which relational algebra operations do not need the participating tables to be union-compatibleans join is the relational algebra operations that
what is the difference between top-down and bottom-up programmingans top-down and bottom-up approachesin top-down programming approach we begin by
define a property that is not a property of transactionsans concurrency is not a property of
explain the term step-wise refinementans step wise refinement refinement is a method of elaboration here one starts with a statement of
define an operator that a relational algebra does not haveans relational algebra does not have aggregation
1 determine that the checkpoints are a part of ans checkpoints are a part of recovery
how can we change almost any algorithm to have a good best case running timecheck whether the input constitutes an input at the very startingor else
1 which model is used to store data in tree structuresans hierarchical model is used to store data in tree
determine the language that needs a user to specify the data to be retrieved with no specifying exactly how to get it isans non-procedural
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