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兩個表和視圖的列我有兩個表想要兩個使用日期,但查詢加盟有錯誤加入使用日期
CREATE TABLE `reg_data3` (
`date` date NOT NULL,
`time` time NOT NULL,
`rainfall` float default NULL,
`evep` float default NULL,
`max_temp` float default NULL,
`min_temp` float default NULL,
`sunshine_hrs` float default NULL,
PRIMARY KEY (`date`)
)
ENGINE=MyISAM
DEFAULT CHARSET=latin1;
CREATE TABLE `velocity` (
`date` date NOT NULL,
`run` float NOT NULL,
`velocity` float NOT NULL
)
ENGINE=MyISAM
DEFAULT CHARSET=latin1;
查詢
SELECT
A.date,
A.rainfall,
A.evep,
A.max_temp,
A.min_temp,
A.sunshine_hrs,
B.run,
B.velocity
FROM
reg_data3 A
INNER JOIN velocity B
ON A.date = B.date
WHERE
year(DATE_FORMAT(date, '%y-%m-%d'))='2008' AND
month(DATE_FORMAT(date, '%y-%m-%d'))='04'
ORDER BY
A.date ;`
顯示誤差= column 'date' in where clause is ambiguous
是的,您忘記了別名! –
錯誤是不言自明的_Display錯誤=列'日期'在where子句ambiguous_。含糊不清/不清楚。將表別名放在字段前面:WHERE year(DATE_FORMAT(date,'%y-%m-%d'))='2008'' – AgRizzo