To remove duplicates in the playlist_id column and return only unique IDs, which SQL clause would you use?

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Multiple Choice

To remove duplicates in the playlist_id column and return only unique IDs, which SQL clause would you use?

Removing duplicates from a single column is done with the DISTINCT keyword. SELECT DISTINCT playlist_id FROM your_table; returns each playlist_id only once, filtering out repeated values so you get a unique list of IDs. Distinct works by examining the result and collapsing identical values into a single row. The other phrasings aren’t valid for this purpose in standard SQL—ALL returns all rows (including duplicates) when used, while UNIQUE and DIFFERENT aren’t proper SQL clauses for removing duplicates. So using DISTINCT is the correct approach to obtain unique IDs.

Removing duplicates from a single column is done with the DISTINCT keyword. SELECT DISTINCT playlist_id FROM your_table; returns each playlist_id only once, filtering out repeated values so you get a unique list of IDs. Distinct works by examining the result and collapsing identical values into a single row. The other phrasings aren’t valid for this purpose in standard SQL—ALL returns all rows (including duplicates) when used, while UNIQUE and DIFFERENT aren’t proper SQL clauses for removing duplicates. So using DISTINCT is the correct approach to obtain unique IDs.

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