AIHelperBot

• The SQL statement selects all columns from the "users" table.
• It joins the "comments" table on the "user_id" column and the "posts" table on the "user_id" column.
• It filters the results to only include the user with id 13 and comments or posts made within the last year.

SELECT

u.*

FROM

users u

JOIN comments c ON u.id = c.user_id

JOIN posts p ON u.id = p.user_id

WHERE

u.id = 13

AND (

c.created_at >= DATE_SUB (CURDATE (), INTERVAL 1 YEAR)

OR p.created_at >= DATE_SUB (CURDATE (), INTERVAL 1 YEAR)

)

• The statement uses a LEFT JOIN to combine the "customers" and "rentals" tables based on the customer_id column.
• The WHERE clause filters the result to include only customers who either have a rental_date older than 12 months ago or have no rental_date at all (NULL).
• The SELECT clause retrieves the customer_id and customer_name columns from the "customers" table for the matching rows.

SELECT

c.customer_id,

c.customer_name

FROM

customers c

LEFT JOIN rentals r ON c.customer_id = r.customer_id

WHERE

r.rental_date < DATE_SUB (NOW (), INTERVAL 12 MONTH)

OR r.rental_date IS NULL;