Как решить mysql более 15 подзапросов «ошибка подзапроса возвращает более 1 строки»

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SELECT et.*, 
(SELECT el.waitTime FROM entityleg as el WHERE et.tripId=el.tripId LIMIT 1) AS leg1_waittime, 
(SELECT el.mode FROM entityleg as el WHERE et.tripId=el.tripId LIMIT 1) AS leg1_mode, 
(SELECT el.time FROM entityleg as el WHERE et.tripId=el.tripId LIMIT 1) AS leg1_time, 
(SELECT el.fare FROM entityleg as el WHERE et.tripId=el.tripId LIMIT 1) AS leg1_fare, 
(SELECT el.waitTime FROM entityleg as el WHERE et.tripId=el.tripId LIMIT 1,1) AS leg2_waittime, 
(SELECT el.mode FROM entityleg as el WHERE et.tripId=el.tripId LIMIT 1,1) AS leg2_mode, 
(SELECT el.time FROM entityleg as el WHERE et.tripId=el.tripId LIMIT 1,1) AS leg2_time, 
(SELECT el.fare FROM entityleg as el WHERE et.tripId=el.tripId LIMIT 1,1) AS leg2_fare, 
(SELECT el.waitTime FROM entityleg as el WHERE et.tripId=el.tripId LIMIT 1,2) AS leg3_waittime, 
(SELECT el.mode FROM entityleg as el WHERE et.tripId=el.tripId LIMIT 1,2) AS leg3_mode, 
(SELECT el.time FROM entityleg as el WHERE et.tripId=el.tripId LIMIT 1,2) AS leg3_time, 
(SELECT el.fare FROM entityleg as el WHERE et.tripId=el.tripId LIMIT 1,2) AS leg3_fare, 
(SELECT el.waitTime FROM entityleg as el WHERE et.tripId=el.tripId LIMIT 1,3) AS leg4_waittime, 
(SELECT el.mode FROM entityleg as el WHERE et.tripId=el.tripId LIMIT 1,3) AS leg4_mode, 
(SELECT el.time FROM entityleg as el WHERE et.tripId=el.tripId LIMIT 1,3) AS leg4_time, 
(SELECT el.fare FROM entityleg as el WHERE et.tripId=el.tripId LIMIT 1,3) AS leg4_fare 
FROM entitytrip as et

источник

2016-05-13 Harshil Patel

Что вы пытаетесь сделать? Кажется, что вы делаете SELECT для каждого столбца в той же таблице, которая сумасшедшая – Borjante

Это требование для создания вида, подобного этому .... –

Не пытаясь понять, что вы хотите сделать, я вижу, что последние 8 подзапросов имеют ограничение 1,2 или 1, 3. Эти подзапросы возвратит более одной строки, так что вы лучше изменить его на 2,1 & 3,1

SELECT et.*, 
 
(SELECT el.waitTime FROM entityleg as el WHERE et.tripId=el.tripId LIMIT 1) AS leg1_waittime, 
 
(SELECT el.mode FROM entityleg as el WHERE et.tripId=el.tripId LIMIT 1) AS leg1_mode, 
 
(SELECT el.time FROM entityleg as el WHERE et.tripId=el.tripId LIMIT 1) AS leg1_time, 
 
(SELECT el.fare FROM entityleg as el WHERE et.tripId=el.tripId LIMIT 1) AS leg1_fare, 
 
(SELECT el.waitTime FROM entityleg as el WHERE et.tripId=el.tripId LIMIT 1,1) AS leg2_waittime, 
 
(SELECT el.mode FROM entityleg as el WHERE et.tripId=el.tripId LIMIT 1,1) AS leg2_mode, 
 
(SELECT el.time FROM entityleg as el WHERE et.tripId=el.tripId LIMIT 1,1) AS leg2_time, 
 
(SELECT el.fare FROM entityleg as el WHERE et.tripId=el.tripId LIMIT 1,1) AS leg2_fare, 
 
(SELECT el.waitTime FROM entityleg as el WHERE et.tripId=el.tripId LIMIT 2,1) AS leg3_waittime, 
 
(SELECT el.mode FROM entityleg as el WHERE et.tripId=el.tripId LIMIT 2,1) AS leg3_mode, 
 
(SELECT el.time FROM entityleg as el WHERE et.tripId=el.tripId LIMIT 2,1) AS leg3_time, 
 
(SELECT el.fare FROM entityleg as el WHERE et.tripId=el.tripId LIMIT 2,1) AS leg3_fare, 
 
(SELECT el.waitTime FROM entityleg as el WHERE et.tripId=el.tripId LIMIT 3,1) AS leg4_waittime, 
 
(SELECT el.mode FROM entityleg as el WHERE et.tripId=el.tripId LIMIT 3,1) AS leg4_mode, 
 
(SELECT el.time FROM entityleg as el WHERE et.tripId=el.tripId LIMIT 3,1) AS leg4_time, 
 
(SELECT el.fare FROM entityleg as el WHERE et.tripId=el.tripId LIMIT 3,1) AS leg4_fare 
 
FROM entitytrip as et

источник

2016-05-13 08:07:47 Borjante

SELECT et.*, 
(SELECT el.waitTime FROM entityleg as el WHERE et.tripId=el.tripId LIMIT 1) AS leg1_waittime, 
(SELECT el.`mode` FROM entityleg as el WHERE et.tripId=el.tripId LIMIT 1) AS leg1_mode, 
(SELECT el.`time` FROM entityleg as el WHERE et.tripId=el.tripId LIMIT 1) AS leg1_time, 
(SELECT el.fare FROM entityleg as el WHERE et.tripId=el.tripId LIMIT 1) AS leg1_fare, 
(SELECT el.waitTime FROM entityleg as el WHERE et.tripId=el.tripId LIMIT 1,1) AS leg2_waittime, 
(SELECT el.`mode` FROM entityleg as el WHERE et.tripId=el.tripId LIMIT 1,1) AS leg2_mode, 
(SELECT el.`time` FROM entityleg as el WHERE et.tripId=el.tripId LIMIT 1,1) AS leg2_time, 
(SELECT el.fare FROM entityleg as el WHERE et.tripId=el.tripId LIMIT 1,1) AS leg2_fare, 
(SELECT el.waitTime FROM entityleg as el WHERE et.tripId=el.tripId LIMIT 2,1) AS leg3_waittime, 
(SELECT el.`mode` FROM entityleg as el WHERE et.tripId=el.tripId LIMIT 2,1) AS leg3_mode, 
(SELECT el.`time` FROM entityleg as el WHERE et.tripId=el.tripId LIMIT 2,1) AS leg3_time, 
(SELECT el.fare FROM entityleg as el WHERE et.tripId=el.tripId LIMIT 2,1) AS leg3_fare, 
(SELECT el.waitTime FROM entityleg as el WHERE et.tripId=el.tripId LIMIT 3,1) AS leg4_waittime, 
(SELECT el.`mode` FROM entityleg as el WHERE et.tripId=el.tripId LIMIT 3,1) AS leg4_mode, 
(SELECT el.`time` FROM entityleg as el WHERE et.tripId=el.tripId LIMIT 3,1) AS leg4_time, 
(SELECT el.fare FROM entityleg as el WHERE et.tripId=el.tripId LIMIT 3,1) AS leg4_fare 
FROM entitytrip as et

Вот исправленный код. С время и режим уже предопределены в mysql. Так что для MySQL, чтобы понять, как имя столбца, вы должны использовать ` ` время и ` ` режим.

Также ошибка «подзапрос возвращает более 1 строки», поскольку вы неправильно установили лимит и смещение. Вместо limit 2,1 вы использовали limit 1,2. Аналогичным образом limit 3,1 Вы использовали limit 1,3

источник

2016-05-13 08:30:57

Как решить mysql более 15 подзапросов «ошибка подзапроса возвращает более 1 строки»

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