SQL Server查询表结构信息

SELECT 
    TABLE_NAME     = case when a.colorder=1 then d.name else '' end,
    TABLE_COMMENT  = case when a.colorder=1 then isnull(f.value,'') else '' end,
    COLUMN_SEQ     = a.colorder,
    COLUMN_NAME    = a.name,
    IDENT          = case when COLUMNPROPERTY( a.id,a.name,'IsIdentity')=1 then '√'else '' end,
    PK             = 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,
    COLUMN_TYPE    = b.name,
    COLUMN_SIZE    = a.length,
    COLUMN_LENGTH  = COLUMNPROPERTY(a.id,a.name,'PRECISION'),
    DECIMAL_PLACE  = isnull(COLUMNPROPERTY(a.id,a.name,'Scale'),0),
    ISNULLABLE     = case when a.isnullable=1 then '√'else '' end,
    DEFAULT_VALUE  = isnull(e.text,''),
    COLUMN_COMMENT = 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.major_id and a.colid=g.minor_id  
left join sys.extended_properties f on d.id=f.major_id and f.minor_id=0
where d.name='employee'
order by a.id,a.colorder