Connection con;
Statement stmt = con.getConnection("databasename","username","password");
ResultSet rs = stmt.executeQuery("SELECT seq_a_grbh.nextval FROM dual");
String str = rs.getString(1);
//插入Company表
//select出CompanyID
//用同样的方法生成UserID,插入表中
Statement stmt = con.getConnection("databasename","username","password");
ResultSet rs = stmt.executeQuery("SELECT seq_a_grbh.nextval FROM dual");
String str = rs.getString(1);
//插入Company表
//select出CompanyID
//用同样的方法生成UserID,插入表中
SELECT seq_a_grbh.nextval FROM dual
其中seq_a_grbh.nextval是什么?
dual 又是什么?