我一直在获取“ java.sql.SQLException:找不到列'id'。”尝试在Netbeans上使用DB2从表中进行选择时。这是我的表创建代码:
string="CREATE TABLE PlayerCollection "
+ "(id integer not null GENERATED ALWAYS AS IDENTITY (START WITH 1, INCREMENT BY 1),"
+ "name varchar(20),"
+ "height varchar(20),"
+ "weight varchar(20),"
+ "position varchar(20),"
+ "team varchar(20),"
+ "PRIMARY KEY (id))";
这是我要从表中选择的代码:
String sql = "select name, height, weight, position, team from PlayerCollection "
+ "where id=" + strIndex;
即使表中明显存在“ id”,为什么仍会收到此异常,我该如何解决?实际上,我的错误似乎在此行:
int ind = rs.getInt("id");
这里"rs"
是结果集。
结果集仅包含您选择的列,因此您必须在选择列表中包括列id
:
String sql = "select id, name, height, weight, position, team from PlayerCollection "
+ "where id=" + strIndex;
或者因为您在id
子句中使用的变量strIndex
中具有WHERE
的值,所以只需删除该行:
int ind = rs.getInt("id");
从您的代码,或将其更改为此:
int ind = Integer.parseInt(strIndex);