COUNT with a non-grouped column: Analyze the statement. “The SQL: SELECT Name, COUNT() FROM NAME_TABLE; counts the number of name rows and displays this total in a table with a single row and a single column.”

Introduction / Context: Mixing aggregated and non-aggregated columns in a SELECT list requires a GROUP BY clause in standard SQL. Without GROUP BY, only aggregate expressions are allowed (or all selected columns must be functionally dependent according to vendor-specific extensions). This question examines what happens when Name appears alongside COUNT() without GROUP BY.

Given Data / Assumptions:

• ANSI SQL-92 behavior is assumed.
• NAME_TABLE contains a column Name and multiple rows.
• No vendor-specific “only_full_group_by” relaxations are assumed.

Concept / Approach: The query SELECT Name, COUNT() FROM NAME_TABLE; is invalid in standard SQL because Name is neither aggregated nor grouped. Most engines will raise a syntax or semantic error (for example, “column must appear in the GROUP BY clause or be used in an aggregate function”). Furthermore, even if a vendor allowed it with non-standard behavior, the result would not be “a single row and a single column”—the SELECT list clearly has two columns. To correctly count all rows, use SELECT COUNT() FROM NAME_TABLE; To count per name, use SELECT Name, COUNT() FROM NAME_TABLE GROUP BY Name;

Step-by-Step Solution:

Verification / Alternative check: Test in PostgreSQL or SQL Server—engine rejects the non-grouped, non-aggregated column alongside an aggregate.

Why Other Options Are Wrong:

• “Correct” misstates the rules and the output shape.
• Uniqueness of Name does not remove the need for GROUP BY in standard SQL.
• “Autogrouping” is not part of the standard and is rarely supported.

Common Pitfalls: Forgetting GROUP BY when mixing aggregate and non-aggregate columns; misreading result shapes.

Final Answer: Incorrect