Question

CREATE TABLE `schedule` (
  `id` smallint(6) NOT NULL AUTO_INCREMENT,
  `aircraftType` varchar(50) DEFAULT NULL,
//...other fields
  PRIMARY KEY (`id`),
) ENGINE=MyISAM AUTO_INCREMENT=5611 DEFAULT CHARSET=latin1;

CREATE TABLE `aircrafts` (
  `id` smallint(6) NOT NULL AUTO_INCREMENT,
  `aircraftType` varchar(50) DEFAULT NULL,
//...other fields
  PRIMARY KEY (`id`),
) ENGINE=MyISAM AUTO_INCREMENT=5611 DEFAULT CHARSET=latin1;

数据库表的示例内容：

表＆＃34;时间表＆＃34;

aircraftType = "320"

表＆＃34;飞机＆＃34;

aircraftType = "A320"
aircraftType = "A330"

查询：

SELECT *
FROM Schedule F, Aircrafts A
WHERE F.aircraftType = A.aircraftType;

如何以aircratf类型＆＃34; 320＆＃34;的方式更新此查询。和＆＃34; A320＆＃34;在WHERE子句中会被认为是类似的吗？

Answer 1

 SELECT *
FROM Schedule F, Aircrafts A
WHERE F.aircraftType = A.aircraftType LIKE CONCAT('%', F.aircraftType, '%')

OR

LIKE CONCAT('\"','%', F.aircraftType, '%','\"')-added double quotes.

Answer 2

尝试使用SUBSTRING()剪切第一个字符：

SELECT *
FROM Schedule F, Aircrafts A
WHERE F.aircraftType = SUBSTRING(A.aircraftType, 2)

或者像@Mihai建议的那样，只需将%放在其中没有A的字段中：

SELECT *
FROM Schedule F, Aircrafts A
WHERE CONCAT('%', F.aircraftType) LIKE A.aircraftType

但最好的解决方案是更新相同关系字符串的数据。

如何更新WHERE子句以选择相同的数据？

2 个答案: