sqlserver 获取schema、表、字段等关键信息

之前在网上找了好多的sqlserver 获取schema、表、字段等关键信息的材料，但是没有一个完整的回去全部信息，我将所有的材料汇总，总结出获取完整的信息，，上代码：

SELECT
	i.name ,
 (case when a.colorder=1 then d.name else d.name end) 表名,  
 a.colorder 字段序号,a.name 字段名,
 (case when COLUMNPROPERTY( a.id,a.name,IsIdentity)=1 then yelse n 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 y else n 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 yelse n 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  --xtyppe参数设定：视图：V，表：U,主键：PK，存储过程：P
 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
 left join sys.objects h on a.id= h.object_id
 left join sys.schemas i on h.schema_id=i.schema_id
where b.name is not null
and d.name=test_table   --如果只查询指定表名称,加上此条件；视图名改为视图名称
and i.name = test --根据schema进行查询，可删除
 order by a.id,a.colorder

希望对大家有所帮助。