关于数据库查询语句rs.getString("max(simId)")
我想查找数据库中simId最小和最大的两个数，用了如下的语句
String sql="select simId from simulation";
ResultSet rs=stmt.executeQuery(sql);

String maxid=rs.getString("max(simId)");
String minid=rs1.getString("min(simId)");

int maxsimid=java.lang.Integer.parseInt(maxid);
int minsimid=java.lang.Integer.parseInt(minid);

int simcount;//记录仿真总数
simcount=maxsimid-minsimid;
simcount的值总是无法得到，请问是错在哪里？

------解决方案--------------------
int maxsimid=java.lang.Integer.parseInt(maxid);
int minsimid=java.lang.Integer.parseInt(minid);


楼主输出一下这两个变量值，看是否拿到了~·
------解决方案--------------------
select max(simId ) as id1,min(simId ) as id2, max(id)-min(id) as simcount from simulation
用这个语句直接取到
------解决方案--------------------

探讨

select max(simId ) as id1,min(simId ) as id2, max(id)-min(id) as simcount from simulation
用这个语句直接取到