如何在jdbc / derby中连接两个varchars？

Question

我想在JDBC / Derby中运行此代码但是我得到了以下错误。我如何在JDBC中处理它？<​​/ p>

代码：

   SELECT ID,Namee+ " " + Family AS NameS
   FROM Students

Errorr：

The '+' operator with a left operand type of 'VARCHAR' and a right operand type of 'VARCHAR' is not supported.

Answer 1

Derby使用||运算符来连接字符串（如Oracle）：

SELECT ID, Namee || " " || Family AS NameS
FROM Students