如何在mysql中使用join和union进行子查询

Question

我试图在两个子查询中使用连接和联合。这是我的疑问：

SELECT Service,SP.Second_Period, SP.TRX_SP,FP.First_Period,FP.TRX_FP
FROM (((SELECT Service, SUM(Processed) as Second_Period, COUNT(Processed) as TRX_SP
FROM pay
WHERE Status1='Processed' AND Dataime BETWEEN '2017-05-07 00:00:00' and '2017-05-14 00:00:00' 
GROUP BY Service) SP
RIGHT JOIN
(SELECT Service, SUM(Processed) as First_Period, COUNT(Processed) as TRX_FP
FROM pay
WHERE Status1='Processed' AND Dataime BETWEEN '2017-05-01 00:00:00' and '2017-05-06 00:00:00' 
GROUP BY Service) FP USING (Service))
UNION ALL
((SELECT Service, SUM(Processed) as Second_Period, COUNT(Processed) as TRX_SP
FROM pay
WHERE Status1='Processed' AND Dataime BETWEEN '2017-05-07 00:00:00' and '2017-05-14 00:00:00' 
GROUP BY Service) SP
LEFT OUTER JOIN
(SELECT Service, SUM(Processed) as First_Period, COUNT(Processed) as TRX_FP
FROM pay
WHERE Status1='Processed' AND Dataime BETWEEN '2017-05-01 00:00:00' and '2017-05-06 00:00:00' 
GROUP BY Service) FP USING (Service) ))  as tbl2
WHERE SP.Service=FP.Service
GROUP BY Service
Order BY Service

通过这样做，它返回给我这个错误：

  

1064 - 您的SQL语法出错;检查与MariaDB服务器版本对应的手册，以获得正确的语法

     'LEFT OUTER JOIN附近（SELECT服务，SUM（已处理）为First_Period，   COUNT（第16行处理'

我做错了什么？因为我无法在mysql中使用Full Outer Join，所以我正在使用左右连接。

更新

这是使用DAYNAME（Dataime）替换服务的ny代码

SELECT *
FROM (
(
SELECT * FROM
(SELECT DAYNAME(Dataime), SUM(Processed) as Second_Period, COUNT(Processed) as TRX_SP
FROM pay
WHERE Status1='Processed' AND Dataime BETWEEN '2017-05-07 00:00:00' and '2017-05-14 00:00:00' 
GROUP BY DAYNAME(Dataime)) SP
RIGHT JOIN
(SELECT DAYNAME(Dataime), SUM(Processed) as First_Period, COUNT(Processed) as TRX_FP
FROM pay
WHERE Status1='Processed' AND Dataime BETWEEN '2017-05-01 00:00:00' and '2017-05-06 00:00:00' 
GROUP BY DAYNAME(Dataime)) FP USING (DAYNAME(Dataime)))
UNION ALL
(
SELECT * FROM
(SELECT DAYNAME(Dataime), SUM(Processed) as Second_Period, COUNT(Processed) as TRX_SP
FROM pay
WHERE Status1='Processed' AND Dataime BETWEEN '2017-05-07 00:00:00' and '2017-05-14 00:00:00' 
GROUP BY DAYNAME(Dataime)) SP
LEFT OUTER JOIN
(SELECT DAYNAME(Dataime), SUM(Processed) as First_Period, COUNT(Processed) as TRX_FP
FROM pay
WHERE Status1='Processed' AND Dataime BETWEEN '2017-05-01 00:00:00' and '2017-05-06 00:00:00' 
GROUP BY DAYNAME(Dataime)) FP USING (DAYNAME(Dataime)) ))  as tbl2
GROUP BY DAYNAME(Dataime)
Order BY DAYNAME(Dataime)

这是错误：

  

1064 - 您的SQL语法出错;检查与MariaDB服务器版本对应的手册，以获得正确的语法

     

在'（Dataime）附近））UNION ALL（

Answer 1

您需要进行一些更改才能使此查询正常工作：

• 将内部SELECT个查询包装到另一个SELECT *查询中以使JOIN有效，例如() SP LEFT JOIN () SP不是有效的语法。相反，请使用SELECT * FROM (..) SP JOIN (..) FP
• 从SP.*移除SELECT SP FP，SELECT *仅对内部查询可见，请使用WHERE SP.Service=FP.Service
• 再次从WHERE子句中移除SP，FP和SELECT * FROM ( ( SELECT * FROM (SELECT Service, SUM(Processed) as Second_Period, COUNT(Processed) as TRX_SP FROM pay WHERE Status1='Processed' AND Dataime BETWEEN '2017-05-07 00:00:00' and '2017-05-14 00:00:00' GROUP BY Service) SP RIGHT JOIN (SELECT Service, SUM(Processed) as First_Period, COUNT(Processed) as TRX_FP FROM pay WHERE Status1='Processed' AND Dataime BETWEEN '2017-05-01 00:00:00' and '2017-05-06 00:00:00' GROUP BY Service) FP USING (Service)) UNION ALL ( SELECT * FROM (SELECT Service, SUM(Processed) as Second_Period, COUNT(Processed) as TRX_SP FROM pay WHERE Status1='Processed' AND Dataime BETWEEN '2017-05-07 00:00:00' and '2017-05-14 00:00:00' GROUP BY Service) SP LEFT OUTER JOIN (SELECT Service, SUM(Processed) as First_Period, COUNT(Processed) as TRX_FP FROM pay WHERE Status1='Processed' AND Dataime BETWEEN '2017-05-01 00:00:00' and '2017-05-06 00:00:00' GROUP BY Service) FP USING (Service) )) as tbl2 GROUP BY Service Order BY Service 将不会显示。

以下查询应该有效：

USING

<强>更新

您不能在USING子句中使用函数，因此您需要为该列添加别名并使用SELECT * FROM ( ( SELECT * FROM (SELECT DAYNAME(Dataime) as 'day', SUM(Processed) as Second_Period, COUNT(Processed) as TRX_SP FROM pay WHERE Status1='Processed' AND Dataime BETWEEN '2017-05-07 00:00:00' and '2017-05-14 00:00:00' GROUP BY DAYNAME(Dataime)) SP RIGHT JOIN (SELECT DAYNAME(Dataime) as 'day', SUM(Processed) as First_Period, COUNT(Processed) as TRX_FP FROM pay WHERE Status1='Processed' AND Dataime BETWEEN '2017-05-01 00:00:00' and '2017-05-06 00:00:00' GROUP BY DAYNAME(Dataime)) FP USING(`day`)) UNION ALL ( SELECT * FROM (SELECT DAYNAME(Dataime) as `day`, SUM(Processed) as Second_Period, COUNT(Processed) as TRX_SP FROM pay WHERE Status1='Processed' AND Dataime BETWEEN '2017-05-07 00:00:00' and '2017-05-14 00:00:00' GROUP BY DAYNAME(Dataime)) SP LEFT OUTER JOIN (SELECT DAYNAME(Dataime) as `day`, SUM(Processed) as First_Period, COUNT(Processed) as TRX_FP FROM pay WHERE Status1='Processed' AND Dataime BETWEEN '2017-05-01 00:00:00' and '2017-05-06 00:00:00' GROUP BY DAYNAME(Dataime)) FP USING (`day`) )) as tbl2 GROUP BY `day` Order BY `day` 中的别名，例如：

behavior: url(#default#VML);                   -> ignored wrong ending
background-image: url(dog.ttf);                -> ignored wrong ending
background-image: url('cat.png');              -> cat.png
background-image: url(bird.gif);               -> bird.gif
background-image: url('../monkey.png');        -> monkey.png
background-image: url('../../rab$bit.png');    -> rab$bit.png
background-image: url('../animal/cow.jpg');    -> cow.jpg