[英]MySQL group_concat with join
我有聯系表。 每個聯系人可以有多個具有不同或相同表的電話號碼。 同樣,每個聯系人可以有多個具有不同或相同標簽的電子郵件。 我需要選擇所有不同的電話號碼和電子郵件ID屬於特定聯系人。
CREATE TABLE IF NOT EXISTS `contact` (
`id` int(8) unsigned NOT NULL ,
`fname` varchar(64) NOT NULL,
`lname` varchar(64) NOT NULL
) ENGINE=InnoDB DEFAULT CHARSET=latin1 ;
CREATE TABLE IF NOT EXISTS `phone` (
`id` int(8) unsigned NOT NULL ,
`sourceid` int(8) unsigned NOT NULL ,
`type` varchar(16) NOT NULL,
`phone` varchar(16) NOT NULL
) ENGINE=InnoDB DEFAULT CHARSET=latin1 ;
CREATE TABLE IF NOT EXISTS `email` (
`id` int(8) unsigned NOT NULL ,
`sourceid` int(8) unsigned NOT NULL ,
`type` varchar(16) NOT NULL,
`email` varchar(128) NOT NULL
) ENGINE=InnoDB DEFAULT CHARSET=latin1 ;
INSERT INTO contact values ( 1,'john' ,'j' ),
(2, 'jose' ,'f' ),
(3, 'test' ,'k' ),
(4, 'tester' ,'j' );
INSERT INTO phone values( 1 ,1, 'Home', '123456' ),
( 2 ,1, 'Home', '123456342' ),
( 3 ,1, 'Office', '12345645' ),
( 4 ,1, 'Mobile', '1234567' ),
( 5 ,2, 'Home', '123456' ),
( 5 ,2, 'Home', '987556' );
INSERT INTO email values
( 1 ,1, 'Home', 'john@gmail.com' ),
( 2 ,1, 'Home', 'john@yahoo.com' ),
( 3 ,1, 'Office', 'john@inc.com' ),
( 4 ,2, 'Home', 'jose@gmail.com' ),
( 5 ,4, 'Home', 'test@test.com' );
我嘗試過GROUP_CONCAT,但標簽上有重復的條目。
SELECT C.id, fname, lname
, GROUP_CONCAT(ph.sourceid),
GROUP_CONCAT(em.sourceid),
GROUP_CONCAT(ph.type), GROUP_CONCAT(ph.phone),
GROUP_CONCAT(em.type), GROUP_CONCAT(em.email)
FROM contact AS C
LEFT JOIN phone AS PH ON PH.sourceid = C.id
LEFT JOIN email EM ON EM.sourceid = C.id
WHERE C.id='1'
GROUP BY C.id
嘗試這個:
SELECT c.id, c.fname, c.lname,
ph.PhoneType, ph.PhoneNos,
em.EmailType, em.EmailIds
FROM contact AS c
LEFT JOIN (SELECT ph.sourceid, GROUP_CONCAT(ph.type) AS PhoneType, GROUP_CONCAT(ph.phone) AS PhoneNos
FROM phone AS ph
GROUP BY ph.sourceid
) AS ph ON ph.sourceid = c.id
LEFT JOIN (SELECT em.sourceid, GROUP_CONCAT(em.type) AS EmailType, GROUP_CONCAT(em.email) AS EmailIds
FROM email AS em
GROUP BY em.sourceid
) AS em ON em.sourceid = c.id
WHERE c.id = '1'
GROUP BY c.id
OUTPUT
| ID | FNAME | LNAME | PHONETYPE | PHONENOS | EMAILTYPE | EMAILIDS |
|----|-------|-------|-------------------------|-----------------------------------|------------------|--------------------------------------------|
| 1 | john | j | Home,Home,Office,Mobile | 123456,123456342,12345645,1234567 | Home,Home,Office | john@gmail.com,john@yahoo.com,john@inc.com |
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