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如何解决mysql超过15个子查询“子查询返回多于1行”错误

2016-05-13 85 views
-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 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

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2016-05-13 Harshil Patel

+0

你想要做什么？ 似乎你正在为同一个表中的每一列做出选择，这是疯狂的 – Borjante

+0

这是要求创建这样的视图.... –

回答

0

没有试图了解你想要做什么，我看到最后8个子查询的限制为1,2或1， 3。这些子查询将返回多行，所以你最好将其更改为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

来源

2016-05-13 08:07:47 Borjante

0 
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

以下是更正代码。由于时间和模式已经在mysql中预定义。因此，为了让mysql将它理解为列名，你必须使用`时间`和`模式`。

也出现“子查询返回多于1行”，因为您错位了限制和偏移。而不是limit 2,1您使用了limit 1,2。同样使用limit 3,1limit 1,3

来源

2016-05-13 08:30:57

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