1、查询数据表的属性(名称、说明、是否主键、数据类型、是否自增)
SELECT t1.name columnName,case when t4.id is null then 'false' else 'true' end as pkColumn,
case when COLUMNPROPERTY( t1.id,t1.name,'IsIdentity') = 1 then 'true' else 'false' end as autoAdd
,t5.name jdbcType
,cast(isnull(t6.value,'') as varchar(2000)) descr
FROM SYSCOLUMNS t1
left join SYSOBJECTS t2 on t2.parent_obj = t1.id AND t2.xtype = 'PK'
left join SYSINDEXES t3 on t3.id = t1.id and t2.name = t3.name
left join SYSINDEXKEYS t4 on t1.colid = t4.colid and t4.id = t1.id and t4.indid = t3.indid
left join systypes t5 on t1.xtype=t5.xtype
left join sys.extended_properties t6 on t1.id=t6.major_id and t1.colid=t6.minor_id
left join SYSOBJECTS tb on tb.id=t1.id
where tb.name='APIInfo' and t5.name<>'sysname'
order by t1.colid asc
若只是简单查询列名及字段类型/长度等信息，直接用下面语句即可
SELECT name,type_name(xtype) AS type,length,(type_name(xtype)+'('+CONVERT(varchar,length)+')') as t
FROM syscolumns
WHERE (id = OBJECT_ID('view_UserInfo'))
以上sql，碰到字段类型为：hierarchyid、geometry、geography时，查询的字段信息不对，可使用以下sql：
------sqlserver 查询某个表的列名称、说明、备注、类型等
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
--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
where
d.name='Test'
order by
a.id,a.colorder