Data Science Skills

Table: candidates > > >Each record associates one skill with a candidate. The table has no primary key, and no two rows are identical. > >Find the candidate_id values for candidates who have Python, Tableau, and PostgreSQL among their skills. List the matching IDs in ascending order. > >The expected result layout is illustrated here. Example >Input: > >Output: > >Explanation: >Only candidate 123 includes each of the three requested skills. Candidate 234 has none of them,…