Question

Which SQL keyword is used to change the values of an entire column?

1) CHANGE
2) INSERT
3) SELECT
4) SET
5) MODIFY

Answer 1

The SQL keyword to change the values of an entire column is SET, which is used in conjunction with the UPDATE statement. The SET keyword establishes the new value(s) for the specified column(s), and a WHERE clause is used to determine which rows should be updated.

Step-by-step explanation:

The SQL keyword used to change the values of an entire column is SET. When we want to modify the data in a table, we would typically use the UPDATE statement, which is followed by the SET keyword to specify the changes. The SET keyword is always used in conjunction with the UPDATE statement to establish the new value(s) for the chosen column(s). Here's an example showing how to use SET to update a whole column:

UPDATE table_name SET column_name = 'new_value' WHERE some_condition;

Remember, the WHERE clause specifies which rows should be updated. If the WHERE clause is omitted, all rows in the column will be updated with the 'new_value'.