Which is not a operation implemented by the SQL select command?1 pointrestrictprojectjoinnone of the above
Question
Which is not a operation implemented by the SQL select command?1 pointrestrictprojectjoinnone of the above
Solution
The SQL SELECT command is used to fetch data from a database. The operations implemented by the SELECT command include:
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Restrict: This operation is used to select a subset of the tuples from a relation that satisfies a selection condition.
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Project: This operation is used to select a subset of the columns (attributes) in a relation.
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Join: This operation is used to combine related tuples from two relations into single "longer" tuples.
Therefore, the correct answer is "none of the above" because all of the options listed are operations implemented by the SQL SELECT command.
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