Final answer:
To delete all records in the 'dogs' table where the breed is 'mixed', use the SQL command: DELETE FROM dogs WHERE breed = 'mixed'; Ensure to backup your database before performing this operation, as it is irreversible.
Step-by-step explanation:
To delete ALL the records in the table dogs where the breed is mixed, you'll need to use a SQL command. The exact command will depend on the SQL dialect you are using, but typically, it will look something like this:
DELETE FROM dogs WHERE breed = 'mixed';
This command checks the breed column of each row in the dogs table. If the value is 'mixed', that row will be deleted. It's important to use this command cautiously, as it will permanently remove the matching records from the database. Ensure you have a backup of your database before executing such an operation if necessary.