[Oracle/sql]查看当前用户名下有多少表 以及查看表字段信息

SQL>  select table_name from user_tables order by table_name;

TABLE_NAME
------------------------------
BIGTABLE
COURSE
EMP
HY_MILLION
HY_MILLION2
SCORE
SMALLTABLE
STUDENT
TB_100MILLION
TB_COURSE
TB_DEPT03
TB_EMP01
TB_EMP02
TB_EMP03
TB_EMP04
TB_MILLION
TB_SC
TB_SCORE
TB_SCORE01
TB_SCORE2
TB_SCORE3
TB_SC_NODUP
TB_SC_NODUP2
TB_STUDENT
TB_TENMILLION
TEST01
TEST02
TEST03
TEST04
TESTCOUNT

已选择30行。

SQL> desc testcount;
 名称                                      是否为空? 类型
 ----------------------------------------- -------- ----------------------------
 NAME                                               NVARCHAR2(60)
 VAL                                                NVARCHAR2(60)

SQL>