MySQL错误1054：'on子句'中的未知列'hotels.postal_code'
[英]MySQL Error 1054: Unknown Column 'hotels.postal_code' in 'on clause'
问题描述
I'm not too sure why but my codes can't seem to work. 
我不太清楚为什么，但我的代码似乎无法正常工作。 Its either I get Error 1052 or 1054. Here are my codes. 它要么我得到错误1052或1054.这是我的代码。 Please Help. 请帮忙。
SELECT
hotels.postal_code AS ' Hotel Postal Code',
name AS 'Hotel Name',
latitude AS 'Latitude',
longitude AS 'Longitude',
address AS 'Hotel Address',
hyperlink AS 'Hotel Hyperlink',
hotels.district AS 'Hotel District',
'hotel' AS type
FROM
hotels
join
hotel_sales ON hotels.postal_code = hotel_sales.sales_id
join
postal_code_location ON hotels.district = postal_code_location.district
UNION SELECT
malls.postal_code AS ' Mall Postal Code',
name AS 'Mall Name',
latitude AS 'Latitude',
longitude AS 'Longitude',
address AS 'Mall Address',
hyperlink AS 'Mall Hyperlink',
malls.district AS 'Mall District',
'mall' AS type
FROM
malls
join
hotel_sales ON hotels.postal_code = hotel_sales.sales_id
join
postal_code_location ON hotels.district = postal_code_location.district
2 个解决方案
解决方案1
2 已采纳 2014-02-10 15:48:05
Replace 更换
FROM
malls
join
hotel_sales ON hotels.postal_code = hotel_sales.sales_id
AS 如
FROM
malls
join
hotel_sales ON malls.postal_code = hotel_sales.sales_id
Joining MALLS and HOTEL_SALES with right column... 使用右栏加入MALLS和HOTEL_SALES ......
So the final Query would be.. 所以最终的查询将是......
SELECT
hotels.postal_code AS ' Hotel Postal Code',
name AS 'Hotel Name',
latitude AS 'Latitude',
longitude AS 'Longitude',
address AS 'Hotel Address',
hyperlink AS 'Hotel Hyperlink',
hotels.district AS 'Hotel District',
'hotel' AS type
FROM
hotels
join
hotel_sales ON hotels.postal_code = hotel_sales.sales_id
join
postal_code_location ON hotels.district = postal_code_location.district
UNION SELECT
malls.postal_code AS ' Mall Postal Code',
name AS 'Mall Name',
latitude AS 'Latitude',
longitude AS 'Longitude',
address AS 'Mall Address',
hyperlink AS 'Mall Hyperlink',
malls.district AS 'Mall District',
'mall' AS type
FROM
malls
join
hotel_sales ON malls.postal_code = hotel_sales.sales_id
join
postal_code_location ON hotels.district = postal_code_location.district
解决方案2
1 2014-02-10 15:48:50
This error is about 这个错误是关于
Disambiguate column_id in your Query
It should be something like this 它应该是这样的
SELECT
hotels.postal_code AS ' Hotel Postal Code',
hotels.name AS 'Hotel Name',
hotels.latitude AS 'Latitude',
....
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