SELECT

 表名 = case when a.colorder= then d.name else '' end,

 表说明 = case when a.colorder= then isnull(f.value,'') else '' end,

 字段序号 = a.colorder,

 字段名 = a.name,

 标识 = case when COLUMNPROPERTY( a.id,a.name,'IsIdentity')= then '√'else '' end,

 主键 = case when exists(SELECT  FROM sysobjects where xtype='PK' and parent_obj=a.id and name in (

 SELECT name FROM sysindexes WHERE indid in(

 SELECT indid FROM sysindexkeys WHERE id = a.id AND colid=a.colid))) then '√' else '' end,

 类型 = b.name,

 占用字节数 = a.length,

 长度 = COLUMNPROPERTY(a.id,a.name,'PRECISION'),

 小数位数 = isnull(COLUMNPROPERTY(a.id,a.name,'Scale'),),

 允许空 = case when a.isnullable= then '√'else '' end,

 默认值 = isnull(e.text,''),

 字段说明 = isnull(g.[value],'')

 FROM

 syscolumns a

 left join

 systypes b

 on

 a.xusertype=b.xusertype

 inner join

 sysobjects d

 on

 a.id=d.id and d.xtype='U' and d.name<>'dtproperties'

 left join

 syscomments e

 on

 a.cdefault=e.id

 left join

 sys.extended_properties g

 on

 --a.id=g.id and a.colid=g.smallid

 a.id=g.major_id and a.colid=g.Minor_id

 left join

 sys.extended_properties f

 on

 --d.id=f.id and f.smallid=

 d.id=f.major_id and f.Minor_id=

 where

 d.name='表名' --如果只查询指定表,加上此条件

 order by

 a.id,a.colorder

 SELECT

 USER_TAB_COLS.TABLE_NAME as 表名,

 user_tab_comments.comments as 表备注,

 USER_TAB_COLS.COLUMN_ID as 列序号,

 user_col_comments.comments as 列备注,

 USER_TAB_COLS.COLUMN_NAME as 列名 ,

 USER_TAB_COLS.DATA_TYPE as 数据类型,

 USER_TAB_COLS.DATA_LENGTH as 长度,

 USER_TAB_COLS.NULLABLE as 是否为空,

 user_cons_columns.constraint_name as 约束名,

 user_constraints.constraint_type as 主键

 FROM USER_TAB_COLS inner join user_col_comments on

 user_col_comments.TABLE_NAME=USER_TAB_COLS.TABLE_NAME

 and user_col_comments.COLUMN_NAME=USER_TAB_COLS.COLUMN_NAME

 INNER join user_cons_columns on user_cons_columns.table_name=USER_TAB_COLS.table_name

 INNER join user_constraints on user_constraints.table_name=USER_TAB_COLS.table_name and user_constraints.constraint_name=user_cons_columns.constraint_name

 inner join user_tab_comments on USER_TAB_COLS.TABLE_NAME=user_tab_comments.TABLE_NAME

 WHERE USER_TAB_COLS.table_name='表名'

 ORDER BY USER_TAB_COLS.TABLE_NAME