How many rows does the following query produce in the report: select * from sq.employee_donations, sq.employees?

How many rows does the following query produce in the report: select * from sq.employee_donations, sq.employees?

• A. 4
• B. 5
• C. 9
• D. 20

Answer: (D)

When interpreting the query `select * from sq.employee_donations, sq.employees`, we note that this SQL statement creates a cartesian product of the two tables, `sq.employee_donations` and `sq.employees`. A cartesian product results in every combination of rows from the first table with every combination of rows from the second table. To determine the number of rows in the resulting report, it is essential to know how many rows exist in each of the two tables. The total number of rows produced by the cartesian product can be calculated by multiplying the number of rows in `sq.employee_donations` with the number of rows in `sq.employees`. For example, if `sq.employee_donations` contains 4 rows and `sq.employees` contains 5 rows, the total number of rows generated by the query would be: 4 (rows from employee_donations) * 5 (rows from employees) = 20 rows in the resultant report. This highlights that the query effectively combines the records in a manner allowing for multiple combinations, thus leading to an output that typically exceeds the number of rows found in either individual table when they are joined in this manner. Based on this logic, the produced

When interpreting the query select * from sq.employee_donations, sq.employees, we note that this SQL statement creates a cartesian product of the two tables, sq.employee_donations and sq.employees. A cartesian product results in every combination of rows from the first table with every combination of rows from the second table.

To determine the number of rows in the resulting report, it is essential to know how many rows exist in each of the two tables. The total number of rows produced by the cartesian product can be calculated by multiplying the number of rows in sq.employee_donations with the number of rows in sq.employees.

For example, if sq.employee_donations contains 4 rows and sq.employees contains 5 rows, the total number of rows generated by the query would be:

4 (rows from employee_donations) * 5 (rows from employees) = 20 rows in the resultant report.

This highlights that the query effectively combines the records in a manner allowing for multiple combinations, thus leading to an output that typically exceeds the number of rows found in either individual table when they are joined in this manner. Based on this logic, the produced