1. 获取sql 表结构
   

   SELECT syscolumns.name,systypes.name,syscolumns.length --,syscolumns.isnullable 
   FROM syscolumns, systypes 
   WHERE syscolumns.xusertype = systypes.xusertype 
   AND syscolumns.id = object_id(‘sgmaster‘)

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sql 2005 数据结构查询