Join data from one table based on 2 values - mysql

Question

I have the following SQL statement:
SELECT user_accounts.uacc_id,
user_accounts.uacc_username,
ride_rides.ride_type,
ride_rides.ride_num_seats,
ride_rides.ride_price_seat,
ride_rides.ride_accept_nm,
ride_rides.ride_split_cost,
ride_rides.ride_from,
ride_rides.ride_from_lat,
ride_rides.ride_from_lng,
ride_rides.ride_to,
ride_rides.ride_to_lat,
ride_rides.ride_to_lng,
user_profiles.upro_image_name,
ride_times.ridetms_id,
ride_times.ridetms_return,
ride_times.ridetms_depart_date,
ride_times.ridetms_depart_time,
ride_times.ridetms_return_date,
ride_times.ridetms_return_time,
depart_times.dpttme_text
FROM ride_times
LEFT JOIN ride_rides
ON ride_rides.ride_id = ride_times.ridetms_ride_fk
LEFT JOIN user_accounts
ON ride_rides.ride_uacc_fk = user_accounts.uacc_id
LEFT JOIN user_profiles
ON user_profiles.upro_uacc_fk = user_accounts.uacc_id
LEFT JOIN depart_times
ON depart_times.dpttme_id = ride_times.ridetms_depart_time
WHERE ride_times.ridetms_id = ?"
Right now, I have the query pulling a text representation of the data from ride_times.ridetms_depart_time in the last join, and it works fine. However, I need to do the same with another column in the ride_times table. I think I need to use an alias, but after reading several sources on aliases, I can't wrap my head around how to change the call.
Also, 100 brownie points for any feedback about any glaring mistakes in this call. It is my first attempt at using JOINs.
take care,
lee
Thanks to the responses I've received so far. Here is the structure of the tables involved:
CREATE TABLE `depart_times` (
`dpttme_id` int(11) NOT NULL,
`dpttme_text` varchar(50) DEFAULT NULL,
PRIMARY KEY (`dpttme_id`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1;
CREATE TABLE `ride_rides` (
`ride_id` int(11) NOT NULL AUTO_INCREMENT,
`ride_uacc_fk` int(11) NOT NULL,
`ride_date_added` timestamp NULL DEFAULT CURRENT_TIMESTAMP,
`ride_type` tinyint(4) DEFAULT NULL,
`ride_from` varchar(200) DEFAULT NULL,
`ride_from_lat` float(10,6) DEFAULT NULL,
`ride_from_lng` float(10,6) DEFAULT NULL,
`ride_to` varchar(200) DEFAULT NULL,
`ride_to_lat` float(10,6) DEFAULT NULL,
`ride_to_lng` float(10,6) DEFAULT NULL,
`ride_num_seats` tinyint(4) DEFAULT NULL,
`ride_price_seat` float DEFAULT NULL,
`ride_accept_nm` tinyint(1) DEFAULT '0' COMMENT 'accept non-monetary items',
`ride_split_cost` tinyint(1) DEFAULT '0',
`ride_notes` longtext,
PRIMARY KEY (`ride_id`)
) ENGINE=MyISAM AUTO_INCREMENT=34 DEFAULT CHARSET=latin1;
CREATE TABLE `ride_times` (
`ridetms_id` int(11) NOT NULL AUTO_INCREMENT,
`ridetms_ride_fk` int(11) DEFAULT NULL,
`ridetms_date_added` timestamp NULL DEFAULT CURRENT_TIMESTAMP,
`ridetms_depart_date` date NOT NULL DEFAULT '0000-00-00',
`ridetms_depart_time` tinyint(4) DEFAULT '0',
`ridetms_return` tinyint(1) DEFAULT '0',
`ridetms_return_date` date NOT NULL DEFAULT '0000-00-00',
`ridetms_return_time` tinyint(4) DEFAULT '0',
PRIMARY KEY (`ridetms_id`)
) ENGINE=MyISAM AUTO_INCREMENT=8 DEFAULT CHARSET=latin1;
CREATE TABLE `user_accounts` (
`uacc_id` int(11) unsigned NOT NULL AUTO_INCREMENT,
`uacc_group_fk` smallint(5) unsigned NOT NULL,
`uacc_email` varchar(100) NOT NULL,
`uacc_username` varchar(15) NOT NULL,
`uacc_password` varchar(60) NOT NULL,
`uacc_ip_address` varchar(40) NOT NULL,
`uacc_salt` varchar(40) NOT NULL,
`uacc_activation_token` varchar(40) NOT NULL,
`uacc_forgotten_password_token` varchar(40) NOT NULL,
`uacc_forgotten_password_expire` datetime NOT NULL,
`uacc_update_email_token` varchar(40) NOT NULL,
`uacc_update_email` varchar(100) NOT NULL,
`uacc_active` tinyint(1) unsigned NOT NULL,
`uacc_suspend` tinyint(1) unsigned NOT NULL,
`uacc_fail_login_attempts` smallint(5) NOT NULL,
`uacc_fail_login_ip_address` varchar(40) NOT NULL,
`uacc_date_fail_login_ban` datetime NOT NULL COMMENT 'Time user is banned until due to repeated failed logins',
`uacc_date_last_login` datetime NOT NULL,
`uacc_date_added` datetime NOT NULL,
PRIMARY KEY (`uacc_id`),
UNIQUE KEY `uacc_id` (`uacc_id`),
KEY `uacc_group_fk` (`uacc_group_fk`),
KEY `uacc_email` (`uacc_email`),
KEY `uacc_username` (`uacc_username`),
KEY `uacc_fail_login_ip_address` (`uacc_fail_login_ip_address`)
) ENGINE=InnoDB AUTO_INCREMENT=56 DEFAULT CHARSET=latin1;
CREATE TABLE `user_profiles` (
`upro_id` int(11) NOT NULL AUTO_INCREMENT,
`upro_uacc_fk` int(11) NOT NULL,
`upro_name` varchar(100) DEFAULT NULL,
`upro_blackberry_id` varchar(200) DEFAULT NULL,
`upro_yahoo_id` varchar(200) DEFAULT NULL,
`upro_skype_id` varchar(200) DEFAULT NULL,
`upro_gmail_id` varchar(200) DEFAULT NULL,
`upro_image_name` varchar(200) DEFAULT 'default.jpg',
PRIMARY KEY (`upro_id`),
UNIQUE KEY `upro_id` (`upro_id`),
KEY `upro_uacc_fk` (`upro_uacc_fk`) USING BTREE
) ENGINE=InnoDB AUTO_INCREMENT=25 DEFAULT CHARSET=latin1;
So, to clarify:
Right now I am pulling some text from depart_times based on ride_times.ridetms_depart_time. I need to also pull some text form depart_times based on ride_times.ridetms_return_time.

Answer 1

I think if you have joined all the tables already, Just put the condition with the WHERE clause Like :
WHERE
ride_times.ridetms_id = ?
AND
depart_times.column_name1 = ride_times.return_time
Does this answer your question?
Well, I must point out this line:
LEFT JOIN depart_times ON depart_times.dpttme_id = ride_times.ridetms_depart_time
Just feels like, something wrong with the schema. But, that is also a guess from my side seeing the namings..

Answer 2

Ok,
After LOTS more searching, I found this post:
MySQL alias for SELECT * columns
I have revised my statement to the following and it is working properly:
SELECT user_accounts.uacc_id,
user_accounts.uacc_username,
ride_rides.*,
user_profiles.upro_image_name,
ride_times.*,
dpt1.dpttme_text AS dep_text,
dpt2.dpttme_text AS ret_text
FROM ride_times
LEFT JOIN ride_rides
ON ride_rides.ride_id = ride_times.ridetms_ride_fk
LEFT JOIN user_accounts
ON ride_rides.ride_uacc_fk = user_accounts.uacc_id
LEFT JOIN user_profiles
ON user_profiles.upro_uacc_fk = user_accounts.uacc_id
LEFT JOIN depart_times AS dpt1
ON dpt1.dpttme_id = ride_times.ridetms_depart_time
LEFT JOIN depart_times AS dpt2
ON dpt2.dpttme_id = ride_times.ridetms_return_time
WHERE ride_times.ridetms_id = ?
Thanks very much to everyone who attempted to help me.
take care,
lee