获取sql数据库所有表结构

  SELECT
  (case when a.colorder=1 then d.name else '' end) N'表名',
  a.colorder N'字段序号',
  a.name N'字段名',
  (case when COLUMNPROPERTY( a.id,a.name,'IsIdentity')=1 then '√'else '' end) N'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) N'主键',
  b.name N'类型',
  a.length N'占用字节数',
  COLUMNPROPERTY(a.id,a.name,'PRECISION') as N'长度',
  isnull(COLUMNPROPERTY(a.id,a.name,'Scale'),0) as N'小数位数',
  (case when a.isnullable=1 then '√'else '' end) N'允许空',
  isnull(e.text,'') N'默认值',
  isnull(g.[value],'') AS N'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 sysproperties g
  on a.id=g.id AND a.colid = g.smallid
  order by object_name(a.id),a.colorder
  可以将以上代码放到SQL查询分析器上运行一下就知道了(当然要打开一个数据库啦)