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,      (case when b.name='nvarchar' then b.name+'('+convert(nvarchar(100),columnproperty(a.id,a.name,'PRECISION'))+')' else b.name end) 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 '是'else '否' end) 允许空,      isnull(e.text,'') 默认值,      isnull(g.value,'') AS 字段说明 FROM  syscolumns  a left join systypes bon  a.xtype=b.xusertypeinner join sysobjects don a.id=d.id  and  d.xtype='U' and  d.name<>'dtproperties'left join syscomments e on a.cdefault=e.idleft join sys.extended_properties gon a.id=g.major_id AND a.colid = g.Minor_id --where a.name!='Id' and a.name!='CreatedAt'and a.name!='LastModifiedAt'--order by d.name,a.id,a.colorder