sqlserver 导出数据库表结构

https://www.cnblogs.com/miaomiaoquanfa/p/6909835.html

SELECT
  表名 = case when a.colorder=1 then d.name else '' end,
  表说明 = case when a.colorder=1 then isnull(f.value,'') else '' end,
  字段中文名称 = isnull(g.[value],''),
  字段英文名称 = a.name,
  类型 = b.name,
  长度 = COLUMNPROPERTY(a.id,a.name,'PRECISION'),
  主键 = case when exists(SELECT 1 FROM sysobjects where xtype='PK' 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,
  默认值=isnull(e.text,''),
  允许空=case when a.isnullable=1 then '√'else '' end
  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.major_id and f.minor_id =0
  where d.name='' --如果只查询指定表,加上此条件
  order by a.id,a.colorder