Question 3Which of the following can be used in a SELECT statement to restrict a result set? 1 pointHAVING WHEREDISTINCT All of the above

Break Down the Problem

1. Identify the options provided: HAVING, WHERE, DISTINCT, All of the above.
2. Determine the purpose of each option in the context of a SQL SELECT statement.

Relevant Concepts

1. WHERE Clause: Used to filter records before any groupings are made. It restricts the rows returned by the SELECT statement based on specified criteria.
2. HAVING Clause: Similar to WHERE but is used to filter records after the aggregation. It applies to grouped records.
3. DISTINCT: Used to return unique records by removing duplicates from the result set.

Analysis and Detail

1. WHERE: Filters individual rows before aggregation. Example: SELECT * FROM table WHERE condition;
2. HAVING: Filters results after they have been aggregated. Example: SELECT column, COUNT(*) FROM table GROUP BY column HAVING COUNT(*) > value;
3. DISTINCT: Ensures that the result set contains unique values. Example: SELECT DISTINCT column FROM table;
4. All of the above: Since both WHERE and HAVING can restrict the result set in different contexts, plus DISTINCT removes duplicates, "All of the above" applies.

Verify and Summarize

All three options (WHERE, HAVING, DISTINCT) can be used to restrict a result set in different contexts. Therefore, "All of the above" is the correct answer as each has its use case in SQL.

Final Answer

All of the above