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Junior — Middle

How can you obtain a list of unique elements in the resulting dataset when executing an SQL query?

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Answer from AI

To obtain a list of unique elements in the result of an SQL query, the DISTINCT keyword is used.

Example:

SELECT DISTINCT column_name FROM table_name;

This will return all unique values from the column_name column without repetitions.

If you need to get unique combinations of multiple columns:

SELECT DISTINCT column1, column2 FROM table_name;

DISTINCT filters out duplicate rows in the result set.