Quizzes de desarrollo web

This query returns all the columns from the table Employee: SELECT + FROM Employee
False
True

This query is correct: SELECT * FROM employee ORDER BY age DESC;
False
True

This query is correct: UPDATE table_name SET column1=value1;
False
True

LEFT JOIN returns all rows when there is at least one match in BOTH tables
False
True

A primary key column can contain NULL values.
False
True