1.SQLserver忘记密码修改方法
从"查询分析器"中以"Windows身份验证"连接SQL Server 执行如下过程
EXEC sp_password NULL, '你的新密码', '用户名例如sa'
2.更改当前数据库中对象的所有者。
EXEC sp_changeobjectowner 'dbo.对象名例如表名', '新所有者'
3.SQLSERVER与SQLSERVER之间的分布式查询
建立连接服务器
exec sp_addlinkedserver 'TESTLINK','','SQLOLEDB','远程数据库的ip地址'
创建链接服务器上远程登录之间的映射
exec sp_addlinkedsrvlogin 'TESTLINK','false',null,'SA','密码'
查询示例
select * from TESTLINK.库名.dbo.表名
4.查看库中全部的表
CREATE VIEW dbo.ALL_TABLES
AS
SELECT top 100 PERCENT a.ID,
CASE WHEN a.colorder = 1 THEN d.name ELSE '' END AS TableName,
CASE WHEN a.colorder = 1 THEN isnull(f.value, '') ELSE '' END AS 表说明,
a.colorder AS 字段序号, a.name AS 字段名,
ISNULL(g.[value], '') AS 字段说明, CASE WHEN COLUMNPROPERTY(a.id,
a.name, 'IsIdentity') = 1 THEN '√' ELSE '' END AS 标识,
CASE WHEN EXISTS
(SELECT 1
FROM dbo.sysindexes si INNER JOIN
dbo.sysindexkeys sik ON si.id = sik.id AND si.indid = sik.indid INNER JOIN
dbo.syscolumns sc ON sc.id = sik.id AND sc.colid = sik.colid INNER JOIN
dbo.sysobjects so ON so.name = si.name AND so.xtype = 'PK'
WHERE sc.id = a.id AND sc.colid = a.colid) THEN '√' ELSE '' END AS 主键,
b.name AS 类型, a.length AS 长度, COLUMNPROPERTY(a.id, a.name, 'PRECISION')
AS 精度, ISNULL(COLUMNPROPERTY(a.id, a.name, 'Scale'), 0) AS 小数位数,
CASE WHEN a.isnullable = 1 THEN '√' ELSE '' END AS 允许空, ISNULL(e.text, '')
AS 默认值, d.crdate AS 创建时间,
CASE WHEN a.colorder = 1 THEN d.refdate ELSE NULL END AS 更改时间
FROM dbo.syscolumns a LEFT OUTER JOIN
dbo.systypes b ON a.xtype = b.xusertype INNER JOIN
dbo.sysobjects d ON a.id = d.id AND d.xtype = 'U' AND
d.status >= 0 LEFT OUTER JOIN
dbo.syscomments e ON a.cdefault = e.id LEFT OUTER JOIN
dbo.sysproperties g ON a.id = g.id AND a.colid = g.smallid AND
g.name = 'MS_Description' LEFT OUTER JOIN
dbo.sysproperties f ON d.id = f.id AND f.smallid = 0 AND
f.name = 'MS_Description'
ORDER BY d.name, a.colorder
GO
5 查看库中全部的索引
CREATE VIEW dbo.ALL_INDEXS
AS
SELECT TOP 100 PERCENT a.ID,
CASE WHEN b.keyno = 1 THEN c.name ELSE '' END AS TableName,
CASE WHEN b.keyno = 1 THEN a.name ELSE '' END AS 索引名称, d.name AS 列名,
b.keyno AS 索引顺序, CASE indexkey_property(c.id, b.indid, b.keyno, 'isdescending')
WHEN 1 THEN '降序' WHEN 0 THEN '升序' END AS 排序, CASE WHEN p.id IS NULL
THEN '' ELSE '√' END AS 主键, CASE INDEXPROPERTY(c.id, a.name, 'IsClustered')
WHEN 1 THEN '√' WHEN 0 THEN '' END AS 聚集, CASE INDEXPROPERTY(c.id,
a.name, 'IsUnique') WHEN 1 THEN '√' WHEN 0 THEN '' END AS 唯一,
CASE WHEN e.id IS NULL THEN '' ELSE '√' END AS 唯一约束,
a.OrigFillFactor AS 填充因子, c.crdate AS 创建时间, c.refdate AS 更改时间
FROM dbo.sysindexes a INNER JOIN
dbo.sysindexkeys b ON a.id = b.id AND a.indid = b.indid INNER JOIN
dbo.syscolumns d ON b.id = d.id AND b.colid = d.colid INNER JOIN
dbo.sysobjects c ON a.id = c.id AND c.xtype = 'U' LEFT OUTER JOIN
dbo.sysobjects e ON e.name = a.name AND e.xtype = 'UQ' LEFT OUTER JOIN
dbo.sysobjects p ON p.name = a.name AND p.xtype = 'PK'
WHERE (OBJECTPROPERTY(a.id, N'IsUserTable') = 1) AND (OBJECTPROPERTY(a.id,
N'IsMSShipped') = 0) AND (INDEXPROPERTY(a.id, a.name, 'IsAutoStatistics') = 0)
ORDER BY c.name, a.name, b.keyno
GO
6.SQLSERVER中多表关联update的写法
update a set a.name=b.name from tb1 a,tb2 b where a.bid = b.id
与ORACLE中实现的对比
update tb1 a set a.name= (select name from tb2 b where a.id=b.id )
7.用查询分析器连接只开放了1433端口的数据库服务
SQL SERVER 客户端网络实用工具，别名选项卡－> 添加－> 服务器别名和服务器名称填写目标数据库的IP即可，网络库选择TCP/IP.
8.把某个字段重新生成序列(从1到n)
DECLARE @i int
Set @i = 0
Update TableName Set @i = @i + 1, FieldName = @i