Oracle查看表结构

--- 数据字典表：desc dictionary;

SQL> desc dictionary;
Name  Type        Nullable Default Comments          
---------- -------------- -------- ------- -------------------------- 
TABLE_NAME VARCHAR2(30) Y               Name of the object 
COMMENTS VARCHAR2(4000) Y               Text comment on the object 

---查看表结构

 desc 表名;

如：desc dept;

SQL> desc dept;
Name Type      Nullable Default Comments 
------ ------------ -------- ------- -------- 
DEPTNO NUMBER(2)                           
DNAME VARCHAR2(14) Y                        
LOC VARCHAR2(13) Y