Getting rows between 2 given dates (included rows on those dates) - mysql

Question

I know this should be simple, but Its proving to be quite complicated, I have two tables:
USERS id | name | url
COMMENTS id | id_user | text | lang | date(datetime)
And I want to retrieve all records (comments) between this two given dates (both dates included) I have tried in two different ways but they dont work as spected, returning no results where it should:
OPTION A
The following sentence returns nothing, and there are comments and this two comments should appear as the dates are '2014-01-09 16:34:58' and '2014-01-13 10:09:24'
SELECT
comments.text,
users.url,
users.name
FROM comments
JOIN users
ON comments.id_user = users.id
WHERE comments.date BETWEEN '2014-01-13'
AND '2014-01-09'
AND comments.lang = 'es'
ORDER BY comments.date DESC
OPTION B
THe following sentence returns commments written on day '2014-01-09' BUT not the ones written on '2013-01-09'
SELECT
comments.text,
users.url,
users.name
FROM comments
JOIN users
ON comments.id_user = users.id
WHERE comments.date <= '2014-01-13'
AND comments.date > '2014-01-09'
AND comments.lang = 'es'
ORDER BY comments.date DESC
What am I doing wrong?

Answer 1

Change this:
WHERE comments.date BETWEEN '2014-01-13' AND '2014-01-09'
To this:
WHERE comments.date BETWEEN '2014-01-09' AND '2014-01-13 23:59:59'
The MySQL BETWEEN clause expects the min and max parameters to be ordered properly so smaller value must be specified first. Secondly, to include records for 2014-01-13 you need to add the time portion (the time part in datetime does not contain milliseconds so checking for 23:59:59 is sufficient). Alternately you can write:
WHERE comments.date >= '2014-01-09'
AND comments.date < '2014-01-13' + INTERVAL 1 DAY
-- ^---------------------------^ evaluates to 2014-01-14

Answer 2

Instead of BETWEEN use this
SELECT
comments.texto,
usuarios.url,
users.nombre
FROM comments
JOIN usuarios
ON comments.id_usuario = users.id
WHERE DATE(comments.date) <= '2014-01-14'
AND DATE(comments.date) >= '2014-01-09'
AND comments.lang = 'es'
ORDER BY comments.fecha DESC
OR
SELECT
comments.texto,
usuarios.url,
users.nombre
FROM comments
JOIN usuarios
ON comments.id_usuario = users.id
WHERE comments.date <= '2014-01-14 59:59:59'
AND comments.date >= '2014-01-09 00:00:00'
AND comments.lang = 'es'
ORDER BY comments.fecha DESC