花最少的时间完成最多的工作──字典表

select
A.column_name 字段名,A.data_type 数据类型,
A.data_length 长度,A.data_precision 整数位,
A.Data_Scale 小数位,A.nullable 答应空值,
A.Data_default 缺省值,B.comments 备注,
C.IndexCount 索引次数
from
user_tab_columns A,
user_col_comments B,
(select count(*) IndexCount,Column_Name 
from User_Ind_Columns where 
Table_Name = 'TABLE_TEST' group by Column_Name) C
where
A.Table_Name = B.Table_Name
and A.Column_Name = B.Column_Name
and A.Column_Name = C.Column_Name( )
and A.Table_Name = 'TABLE_name'