So far we’ve been using the
signup_date column in the
users table to filter data:
SELECT COUNT(*) FROM users WHERE signup_date BETWEEN '2018-01-01' AND '2018-01-07'
As you remember,
signup_date is simply a date when a user signed up (in other words, when a record in the users table was created). The signup timestamp is stored inside the
created_at column which has type datetime. We can use the
created_at column for our filter the same way:
SELECT COUNT(*) FROM users WHERE created_at BETWEEN '2018-01-01' AND '2018-01-07'
SQL will figure out that...