获取一个数据库中的所有表的名称、一个表中所有字段的名称

1、如何用SQL获取一个数据库中的所有表的名称; 

SELECT * FROM sysobjects 
WHERE xtype='u'

 
2、如何用SQL获取一个表中所有字段的名称;

SELECT c.name,o.name FROM syscolumns AS c 
INNER JOIN sysobjects AS o 
ON c.id = o.id 

select name from sysobjects where xtype='U'
select name from syscolumns where id=object_id(N'表明') 

Select Name from sysobjects where Type='U'
Select Name from syscolumns where ID=OBJECT_ID(N'TableName') Order By ColID 

SELECT dbo.sysobjects.name AS [table], dbo.syscolumns.name AS columns 
FROM dbo.sysobjects INNER JOIN
dbo.syscolumns ON dbo.sysobjects.id = dbo.syscolumns.id 
WHERE (dbo.sysobjects.xtype = 'u') 

select name from sysobjects where xtype='U'
select name from syscolumns where id=object_id(N'name') 

查询表结构信息 

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 sysproperties g on a.id=g.id and a.colid=g.smallid  
left join sysproperties f on d.id=f.id and f.smallid=0 
--where d.name='要查询的表' --如果只查询指定表,加上此条件 
order by a.id,a.colorder