如何用sql语句获得表的字段名称？

SQL> desc newsindex;
 名称                                      空?      类型
 ----------------------------------------- -------- ----------------------------
 IDNO                                               VARCHAR2(12)
 NTNAME                                             VARCHAR2(50)
 CONTENT                                            VARCHAR2(4000)
 STATSNO                                            VARCHAR2(2)
 SPECNO                                             VARCHAR2(3)
 CREATDATE                                          DATE
 REMARK                                             VARCHAR2(50)