如何在 jdbc 的表中包含两个外键？

Question

I'm using JDBC in eclipse IDE, i want to put two foreign keys in my table 3, one is referencing to the primary key in table 1 and one is referencing to the primary key in table 2. When i only put one foreign key constrains for any referencing table1 or table 2, it works fine but when i include two it gives me sql exception as stated below:

java.sql.SQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'foreign key( T2 ) references Table2( T2 ) )' at line 1

String createString =
// TABLE 1
"CREATE TABLE " + this.tableName + " ( " +
                "T1 varchar(50) NOT NULL PRIMARY KEY )";   
// TABLE 2
"CREATE TABLE " + this.tableName + " ( " +`enter code here`
                "T2 varchar(50) NOT NULL PRIMARY KEY )"; 
// TABLE 3
"CREATE TABLE " + this.tableName + " ( " +
                "T1 varchar(50) " +
                "T2 varchar(50) " +
                "foreign key(T1) references Table1 (T1)" +
                "foreign key(T2) references Table2(T2) )";

Answer 1

First, this is actually a MySQL question, unrelated to Java/JDBC. Secondly, and more importantly, you don't appear to be using the correct syntax, which would be...

CREATE TABLE TableName ( 
    T1 varchar(50),
    T2 varchar(50),
    foreign key(T1) references Table1(T1),
    foreign key(T2) references Table2(T2) 
);

Formatted for your code, it would look like this:

String createString = "CREATE TABLE " + this.tableName + " ( " +
    "   T1 varchar(50)," +
    "   T2 varchar(50)," +
    "   foreign key(T1) references Table1(T1)," +
    "   foreign key(T2) references Table2(T2));";

You were missing commas after each item in the items list for your CREATE TABLE statement.