Ultimate access to all questions.
Upgrade Now 🚀
Sign in to unlock AI tutor
What would be the result of executing the following SQL query on a table named 'customers'?
SELECT COUNT(DISTINCT *) FROM customers;
A
The query will return the total number of distinct rows in the 'customers' table, excluding any rows with NULL values in any column.
B
The query will return the total number of rows in the 'customers' table, including those with NULL values.
C
The query will return the number of distinct values in the first column of the 'customers' table.
D
The query will return the number of distinct values across all columns in the 'customers' table, excluding rows with any NULL values.
E
The query will return an error because the DISTINCT keyword cannot be used with *.
