导出表结构(数据字典)

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
order by a.id,a.colorder