sqlserver查询表中所有字段信息

精简

SELECT 字段名     = a.name,主键       = case when exists(SELECT 1 FROM sysobjects where xtype='PK' and parent_obj=a.id 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,类型       = b.name,字段说明   = isnull(g.[value],'')
FROM syscolumns a
left join systypes b on a.xusertype=b.xusertype
inner join sysobjects d on a.id=d.id  and d.xtype='U' and  d.name<>'dtproperties'
left join sys.extended_properties   g on a.id=G.major_id and a.colid=g.minor_id  
where d.name='area';   

详细sql

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,字段序号   = a.colorder,字段名     = a.name,标识       = case when COLUMNPROPERTY( a.id,a.name,'IsIdentity')=1 then '√'else '' end,主键       = case when exists(SELECT 1 FROM sysobjects where xtype='PK' and parent_obj=a.id 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,类型       = b.name,占用字节数 = a.length,长度       = COLUMNPROPERTY(a.id,a.name,'PRECISION'),小数位数   = isnull(COLUMNPROPERTY(a.id,a.name,'Scale'),0),允许空     = case when a.isnullable=1 then '√'else '' end,默认值     = isnull(e.text,''),字段说明   = isnull(g.[value],'')
FROM syscolumns a
left join systypes b 
on a.xusertype=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='表名'    --如果只查询指定表,加上此where条件，tablename是要查询的表名；去除where条件查询所有的表信息
order by