Answer :
To delete all records where the username is 'dennis', you need to use a SQL command. SQL (Structured Query Language) is used to communicate with databases, specifically for managing and manipulating structured data.
The correct SQL statement to remove records from a table is the DELETE FROM statement. This statement allows you to specify which records should be deleted using the WHERE clause.
Among the options provided, the correct one is:
- DELETE FROM login WHERE username='dennis';
Here's a breakdown of this command:
DELETE FROM login: This part of the command specifies that you want to delete records from the table named "login".
WHERE username='dennis': This specifies the condition that must be met for a record to be deleted. In this case, any record where the "username" field equals 'dennis' will be deleted.
Ensure you execute such a command with caution, especially on a live or production database, as this action cannot be undone unless you have backups. It's always good practice to first run a SELECT query to confirm exactly which records will be affected, like so:
SELECT * FROM login WHERE username='dennis';
This confirms which records match your criteria before executing the DELETE statement.
