--功能概述：显示某一表的结构

DECLARE @tableName nvarchar(100)
SET @tableName ='brand'

--mssql2005
SELECT  (    
        CASE WHEN a.colorder=1 THEN d.name ELSE '' END)表名, 
        a.colorder 字段序号, 
        a.name 字段名, 
        (CASE WHEN COLUMNPROPERTY( a.id,a.name,'IsIdentity')=1 THEN '√' ELSE '' END) 标识, 
        (CASE WHEN (
            SELECT COUNT(*) 
            FROM sysobjects 
            WHERE (name IN 
                      (SELECT name 
                      FROM sysindexes 
                      WHERE (id = a.id) AND (indid IN 
                                (SELECT indid 
                                FROM sysindexkeys 
                              WHERE (id = a.id) AND (colid IN 
                                        (SELECT colid 
                                        FROM syscolumns 
                                        WHERE (id = a.id) AND (name = a.name))))))) AND 
                    (xtype = 'PK'))>0 THEN '√' ELSE '' END) 主键, 
        b.name 类型, 
        a.length 占用字节数, 
        COLUMNPROPERTY(a.id,a.name,'PRECISION') AS 长度, 
        ISNULL(COLUMNPROPERTY(a.id,a.name,'Scale'),0) AS 小数位数, 
        (CASE WHEN a.isnullable=1 THEN '√' ELSE '' END) 允许空, 
        ISNULL(e.text,'') 默认值, 
        ISNULL(g.[value],'') AS 字段说明 
FROM syscolumns a 
    LEFT JOIN systypes b ON a.xtype=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.major_id AND a.colid = g.major_id 
WHERE d.name=@tableName 
ORDER BY a.id,a.colorder

------解决方案--------------------
SQL code
--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)
-- ========================================================================
SELECT 
    TableName=CASE WHEN C.column_id=1 THEN O.name ELSE N'' END,
    TableDesc=ISNULL(CASE WHEN C.column_id=1 THEN PTB.[value] END,N''),
    Column_id=C.column_id,
    ColumnName=C.name,
    PrimaryKey=ISNULL(IDX.PrimaryKey,N''),
    [IDENTITY]=CASE WHEN C.is_identity=1 THEN N'√'ELSE N'' END,
    Computed=CASE WHEN C.is_computed=1 THEN N'√'ELSE N'' END,
    Type=T.name,
    Length=C.max_length,
    Precision=C.precision,
    Scale=C.scale,
    NullAble=CASE WHEN C.is_nullable=1 THEN N'√'ELSE N'' END,
    [Default]=ISNULL(D.definition,N''),
    ColumnDesc=ISNULL(PFD.[value],N''),
    IndexName=ISNULL(IDX.IndexName,N''),
    IndexSort=ISNULL(IDX.Sort,N''),
    Create_Date=O.Create_Date,
    Modify_Date=O.Modify_date
FROM sys.columns C
    INNER JOIN sys.objects O
        ON C.[object_id]=O.[object_id]
            AND O.type='U'
            AND O.is_ms_shipped=0
    INNER JOIN sys.types T
        ON C.user_type_id=T.user_type_id
    LEFT JOIN sys.default_constraints D
        ON C.[object_id]=D.parent_object_id
            AND C.column_id=D.parent_column_id
            AND C.default_object_id=D.[object_id]
    LEFT JOIN sys.extended_properties PFD
        ON PFD.class=1 
            AND C.[object_id]=PFD.major_id 
            AND C.column_id=PFD.minor_id
--             AND PFD.name='Caption'  -- 字段说明对应的描述名称(一个字段可以添加多个不同name的描述)
    LEFT JOIN sys.extended_properties PTB
        ON PTB.class=1 
            AND PTB.minor_id=0 
            AND C.[object_id]=PTB.major_id
--             AND PFD.name='Caption'  -- 表说明对应的描述名称(一个表可以添加多个不同name的描述) 
    LEFT JOIN                       -- 索引及主键信息
    (
        SELECT 
            IDXC.[object_id],
            IDXC.column_id,
            Sort=CASE INDEXKEY_PROPERTY(IDXC.[object_id],IDXC.index_id,IDXC.index_column_id,'IsDescen