Which of the following statements are TRUE about DISTINCT keyword? [Choose any TWO]DISTINCT keyword can be used in SELECT and WHERE clausesDISTINCT removes duplicates based on column immediately following DISTINCTDISTINCT removes duplicates based on all the columns in the SELECT clauseUsage of DISTINCT should be avoided as far as possible due to performance issues
Question
Which of the following statements are TRUE about DISTINCT keyword? [Choose any TWO]DISTINCT keyword can be used in SELECT and WHERE clausesDISTINCT removes duplicates based on column immediately following DISTINCTDISTINCT removes duplicates based on all the columns in the SELECT clauseUsage of DISTINCT should be avoided as far as possible due to performance issues
Solution
The two true statements about the DISTINCT keyword are:
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DISTINCT removes duplicates based on all the columns in the SELECT clause: This is true. When you use the DISTINCT keyword, it will consider all the columns that you have specified in the SELECT clause to determine the uniqueness of a row in the result set.
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Usage of DISTINCT should be avoided as far as possible due to performance issues: This is also true. The DISTINCT keyword can cause performance issues because it needs to sort the results to remove duplicates. This can be especially problematic when dealing with large amounts of data.
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The Distinct Keyword In Sql Is Used To
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Which SQL statement is used to return only different values?Select one:a.SELECT DISTINCTb.None of the answers are correctc.SELECT DIFFERENTd.SELECT IDENTICALe.SELECT UNIQUE
DISTINCT can be used for removing duplicate tuples in the query result in SQL
What does the SQL SELECT DISTINCT statement do?OptionsDeletes duplicate rows from a tableRetrieves unique values from a columnUpdates distinct values in a tableInserts distinct rows into a table
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