Question

我正在创建一个java应用程序，我已连接到mysql数据库。我尝试使用外键创建一个表，下面的错误execute("CREATE TABLE " + BBBBB + "(" + " id int(11) NOT NULL AUTO_INCREMENT,\n" + " consultantID varchar(225) NOT NULL,\n" + " name varchar(225) NOT NULL,\n" + " gender varchar(225) NOT NULL,\n" + " age varchar(225) NOT NULL,\n" + " email varchar(225) NOT NULL,\n" + " mobile varchar(225) NOT NULL,\n" + " address varchar(225) NOT NULL,\n" + " PRIMARY KEY (id)" + ") ENGINE=InnoDB DEFAULT CHARSET=latin1" ); execute("CREATE TABLE " + AAAAA + "(" + " id int(11) NOT NULL AUTO_INCREMENT,\n" + " patientID varchar(225) NOT NULL,\n" + " name varchar(225) NOT NULL,\n" + " gender varchar(225) NOT NULL,\n" + " age varchar(225) NOT NULL,\n" + " insurance varchar(225),\n" + " mobile varchar(225) NOT NULL,\n" + " address varchar(225) NOT NULL,\n" + " PRIMARY KEY (id)" + ") ENGINE=InnoDB DEFAULT CHARSET=latin1" ); execute("CREATE TABLE " + CCCCC + "(" + " id int(11) NOT NULL AUTO_INCREMENT,\n" + " patientID varchar(225) NOT NULL,\n" + " consultantID varchar(225) NOT NULL,\n" + " time varchar(225) NOT NULL,\n" + " date varchar(225) NOT NULL,\n" + " renewCount INTEGER default 0,\n" + " FOREIGN KEY (patientID) REFERENCES AAAAA(pID),\n" + " FOREIGN KEY (consultantID) REFERENCES BBBBB(cID),\n" + " PRIMARY KEY (id)" + ") ENGINE=InnoDB DEFAULT CHARSET=latin1"是我的表

#!/bin/sh
saxonb-xslt -ext:on -xsl:varnovar.xsl -it:'template-novar' && {
    cat novar.xml
}
printf "\n"
saxonb-xslt -ext:on -xsl:varnovar.xsl -it:'template-var' && {
    cat var.xml
}
printf "\n"
exit

我收到了如上所述的错误。将根据要求添加其他代码。感谢

Answer 1

在第三个陈述中，pID和cID似乎不存在，它们应该是patientID和consultantID
创建使用变量AAAAA和BBBBB的表，但在第三个语句中，您将它们称为字符串常量“AAAAA”和“BBBBB”，其中可能不正确，您应该始终使用变量，例如：
```
" ... REFERENCES " + BBBBB + "(cID) ... "
```

jdbc外键约束

1 个答案: