--查询用户表对象信息
select  Tab.Name as [表名],Tab.create_date as [创建时间],Tab.modify_date  as [最后修改时间],
        Col.Name  as [列名] ,Type.name as [数据类型],Col.max_length as [字段长度],
        CASE WHEN pk.is_primary_key= 1 THEN 'Y' ELSE 'N' end as [是否主键],
        CASE WHEN Col.is_identity = 1 THEN 'Y' else 'N'end as [是否自增] ,
        identity_columns.seed_value as [自增种子],identity_columns.increment_value as [自增步长],
        case when Col.is_nullable = 1 then 'Y' else 'N' END AS [是否允许为NULL],
        Def.text as [默认值],case when Col.is_computed = 1 then 'Y' else 'N' END as [是否计算列] ,
        computed_columns.definition as [计算公式],Col_Desc.Value as [列备注]
from sys.objects Tab inner join sys.columns Col on Tab.object_id =Col.object_id
inner join sys.types Type on Col.system_type_id = Type.system_type_id
left join sys.identity_columns identity_columns on  Tab.object_id = identity_columns.object_id and Col.column_id = identity_columns.column_id
left join syscomments Def  on Col.default_object_id = Def.ID
left join(
    select index_columns.object_id,index_columns.column_id,indexes.is_primary_key 
    from sys.indexes  indexes inner join sys.index_columns index_columns 
    on indexes.object_id = index_columns.object_id and indexes.index_id = index_columns.index_id
    where indexes.is_primary_key = 1/*主键*/
) PK on Tab.object_id = PK.object_id AND Col.column_id = PK.column_id
left join sys.computed_columns  computed_columns on Tab.object_id =computed_columns.object_id and Col.column_id = computed_columns.column_id
left join sys.extended_properties Col_Desc on Col_Desc.major_id=Tab.object_id and Col_Desc.minor_id=Col.Column_id and Col_Desc.class=1 
where Tab.type = 'U' and Tab.Name not like'sys%'
order by Tab.create_date

------解决方案--------------------
SQL code
SELECT t.[name] AS [表名],c.[name] AS [字段名],cast(ep.[value] 
as varchar(100)) AS [字段说明] FROM sys.tables AS t INNER JOIN sys.columns 
AS c ON t.object_id = c.object_id LEFT JOIN sys.extended_properties AS ep 
ON ep.major_id = c.object_id AND ep.minor_id = c.column_id

------解决方案--------------------
SQL code
--sql server 2000
SELECT 
    表名       = case when a.colorder=1 then d.name else '' end,
    表说明     = case when a.colorder=1 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')=1 then '√'else '' end,
    主键       = case when exists(SELECT 1 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'),0),
    允许空     = case when a.isnullable=1 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 
    sysproperties g 
on 
    a.id=g.id and a.colid=g.smallid  
left join 
    sysproperties f 
on 
    d.id=f.id and f.smallid=0
where 
    d.name='要查询的表'    --如果只查询指定表,加上此条件
order by 
    a.id,a.colorder



--sql server 2005
-- 1. 表结构信息查询 
-- ========================================================================
-- 表结构信息查询
-- 邹建 2005.08(引用请保留此信息)
-- ========================================================