17:取数据库所有表

select name from sysobjects where type='U'

18:取表中所有字段 已经说明

SELECT  a.name as FieldName ,ISNULL(g.[value], ' ') AS Description   FROM    syscolumns a LEFT JOIN sys.extended_properties g ON a.id = g.major_id AND a.colid = g.minor_id

WHERE   a.id = OBJECT_ID('Dim_Partner')

19:取数据库所有表中所有的相关属性数据

SELECT (case when a.colorder=1 then d.name else null 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 [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.minor_id

 left join sys.extended_properties f on d.id=f.class and f.minor_id=0

where b.name is not null

--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