[英]Multiple rows in a MySQL join
I have this query / PHP code: 我有这个查询/ PHP代码:
public function get_days_appointments($day) {
$day_start = date('Y-m-d 00:00:00', $day);
$day_end = date('Y-m-d 23:59:59', $day);
return $this->db->select('e.id,
e.start_datetime,
e.end_datetime,
e.hash,
e.id_google_calendar,
u1.first_name AS customer_first_name,
u1.last_name AS customer_last_name,
u1.email AS customer_email,
u1.phone_number AS customer_phone_number,
u2.first_name AS provider_first_name,
u2.last_name AS provider_last_name,
u2.email AS provider_email,
u2.phone_number AS provider_phone_number,
s.name,
s.duration,
s.price,
s.description,
t.push_identifier')
->from('ea_appointments e')
->join('ea_users u1', 'e.id_users_customer = u1.id','left')
->join('ea_users u2', 'e.id_users_provider = u2.id','left')
->join('ea_services s', 'e.id_services = s.id','left')
->join('ea_push_ids t', 'e.id_users_customer = t.user_id','left')
//->join('ea_cellcarrier cc', 'u1.id_cellcarrier = cc.id','left')
->where('e.start_datetime >',$day_start)
->where('e.start_datetime <',$day_end)
->get()->result();
}
My problem is that there are multiple push_identifiers (ea_push_ids), but this query only retrieves one. 我的问题是有多个push_identifiers(ea_push_ids),但是此查询只检索一个。 How can I retrieve all the push identifiers belonging to a certain user without messing up the rest of the query? 如何在不弄乱其余查询的情况下检索属于某个用户的所有推送标识符?
You can use GROUP_CONCAT
to put all the ids into a comma - delimited string. 您可以使用GROUP_CONCAT
将所有ID放入以逗号分隔的字符串中。 (Be aware: I changed the alias to push_identifiers
with an s
) (请注意:我使用s
将别名更改为push_identifiers
)
public function get_days_appointments($day) {
$day_start = date('Y-m-d 00:00:00', $day);
$day_end = date('Y-m-d 23:59:59', $day);
return $this->db->select('e.id,
e.start_datetime,
e.end_datetime,
e.hash,
e.id_google_calendar,
u1.first_name AS customer_first_name,
u1.last_name AS customer_last_name,
u1.email AS customer_email,
u1.phone_number AS customer_phone_number,
u2.first_name AS provider_first_name,
u2.last_name AS provider_last_name,
u2.email AS provider_email,
u2.phone_number AS provider_phone_number,
s.name,
s.duration,
s.price,
s.description,
t.push_identifiers')
->from('ea_appointments e')
->join('ea_users u1', 'e.id_users_customer = u1.id','left')
->join('ea_users u2', 'e.id_users_provider = u2.id','left')
->join('ea_services s', 'e.id_services = s.id','left')
->join('(SELECT GROUP_CONCAT(push_identifier) AS push_identifiers, user_id
FROM ea_push_ids
GROUP BY user_id) t', 'e.id_users_customer = t.user_id','left')
->where('e.start_datetime >',$day_start)
->where('e.start_datetime <',$day_end)
->get()->result();
}
Or like this 或者像这样
public function get_days_appointments($day) {
$day_start = date('Y-m-d 00:00:00', $day);
$day_end = date('Y-m-d 23:59:59', $day);
return $this->db->select('e.id,
e.start_datetime,
e.end_datetime,
e.hash,
e.id_google_calendar,
u1.first_name AS customer_first_name,
u1.last_name AS customer_last_name,
u1.email AS customer_email,
u1.phone_number AS customer_phone_number,
u2.first_name AS provider_first_name,
u2.last_name AS provider_last_name,
u2.email AS provider_email,
u2.phone_number AS provider_phone_number,
s.name,
s.duration,
s.price,
s.description,
(SELECT GROUP_CONCAT(t.push_identifier)
FROM ea_push_ids t
WHERE t.user_id = e.id_users_customer) AS push_identifiers')
->from('ea_appointments e')
->join('ea_users u1', 'e.id_users_customer = u1.id','left')
->join('ea_users u2', 'e.id_users_provider = u2.id','left')
->join('ea_services s', 'e.id_services = s.id','left')
->where('e.start_datetime >',$day_start)
->where('e.start_datetime <',$day_end)
->get()->result();
}
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