一、select * from all_tab_cols A where lower(A.Table_Name) = '表名称';
二、select b.TABLE_NAME 表名,
c.comments 表评论,
b.COLUMN_ID 字段信号,
b.COLUMN_NAME 字段名,
b.DATA_LENGTH 数据长度,
b.DATA_PRECISION 整数位,
b.DATA_SCALE 小数位,
a.comments 列描述
from all_col_comments a,all_tab_columns b,all_tab_comments c
where a.table_name=b.TABLE_NAME and a.table_name=c.table_name
and a.column_name=b.COLUMN_NAME
and a.owner=b.OWNER and a.owner=c.owner
and lower(a.table_name)='表名称'
三、select C.OWNER 用户,A.TABLE_NAME 表名,A.COLUMN_NAME as 列名,
decode(A.DATA_TYPE,'CHAR',A.DATA_TYPE || '(' || A.DATA_LENGTH || ')',
'DATE',A.DATA_TYPE,'NUMBER',A.DATA_TYPE || '(' || A.DATA_PRECISION || ',' || A.DATA_SCALE || ')',
'VARCHAR2',A.DATA_TYPE || '(' || A.DATA_LENGTH || ')') as 数据类型,
decode(C.COLUMN_NAME, null, 'No', 'Yes') as 主键,
decode(A.NULLABLE, 'N', 'NOT NULL', 'Y', 'NULL') as 可为空,
B.comments as 备注 from sys.user_tab_cols A,
sys.user_col_comments B,
(
select col.column_name,
c.table_name,
col.owner
from user_constraints c,
user_cons_columns col
where c.constraint_name = col.constraint_name
and c.constraint_type = 'P') C
where lower(A.TABLE_NAME) = 'invd020_invslip'
and A.TABLE_NAME = B.table_name
and A.COLUMN_NAME = B.column_name
and A.Table_Name = C.TABLE_NAME(+)
and A.COLUMN_NAME = C.COLUMN_NAME(+)
order by A.TABLE_NAME, A.Column_Id;