SQLSERVER如何获取一个数据库中的所有表的名称、一个表中所有字

1.查询数据库中的所有数据库名：

 SELECT Name FROM Master..SysDatabases ORDER BY Name

2.查询某个数据库中所有的表名：

SELECT Name FROM SysObjects Where XType='U' ORDER BY Name

3.查询表结构信息：

SELECT (case when a.colorder=1 then d.name else null 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,b.name 类型,a.length 占用字节数,COLUMNPROPERTY(a.id,'PRECISION') as 长度,isnull(COLUMNPROPERTY(a.id,'Scale'),0) as 小数位数,(case when a.isnullable=1 then '√'else '' end) 允许空,isnull(e.text,'') 默认值,isnull(g.[value],' ') AS [说明]
FROM  syscolumns a 
left join systypes b on a.xtype=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.class and f.minor_id=0
where b.name is not null
and d.name='Student' --如果只查询指定表,加上此条件
order by a.id,a.colorder

出处：http://www.cnblogs.com/ynbt/

（编辑：李大同）

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