SqlServer常用语句整理（后续更新）

sysobjecs中对象类型(xtype)：
AF = Aggregate function (CLR)
C = 约束
D = 默认值约束
F = 外键约束
L = Log
FN = 标量值函数
FS = Assembly (CLR) 标量值函数
FT = Assembly (CLR) 表值函数
IF = In-lined table-function
IT = Internal table
P = 存储过程
PC = Assembly (CLR) 存储过程
PK = PRIMARY KEY constraint (type is K)
RF = Replication filter stored procedure
S = 系统表
SN = Synonym
SQ = Service queue
TA = Assembly (CLR) DML trigger
TF = Table function
TR = SQL DML Trigger
TT = Table type
U = 用户表
UQ = UNIQUE constraint (type is K)
V = 试图
X = 扩展存储过程

--批量修改表名为小写
declare @sql varchar(300)--,@rowcount varchar(10),@dyncnum int
declare @tablename varchar(100)
declare cursor1 cursor for
select name  from sysobjects  where xtype = 'u'  order by name
open cursor1
fetch next from cursor1 into @tablename
while @@fetch_status=0
begin
set @sql='sp_rename '''+@tablename+''','''+lower(@tablename)+'''' -- 此为修改为小写，如果修改为大写“upper”
exec(@sql)
fetch next from cursor1 into @tablename
end
close cursor1
deallocate cursor1

--批量修改字段名为小写
declare @sql varchar(300)
declare @tablecolumnname varchar(100), @columnname varchar(100)
declare cursor1 cursor for
select b.name+'.['+a.name+']',a.name from syscolumns a  ,sysobjects b where a.id = object_id(b.name) and b.xtype = 'u' and a.xtype <>189 and a.xtype <>34 and a.xtype <>35 and a.xtype <>36
open cursor1
fetch next from cursor1 into @tablecolumnname,@columnname
while @@fetch_status=0
begin
set @sql='sp_rename '''+@tablecolumnname+''','''+lower(@columnname)+''',''column''' -- 此为修改为小写，如果修改为大写“upper”
exec(@sql)
fetch next from cursor1 into @tablecolumnname,@columnname
end
close cursor1
deallocate cursor1

--批量修改架构名（包括表名和存储过程名）
declare @name sysname
declare csr1 cursor
for select TABLE_NAME from INFORMATION_SCHEMA.TABLES
open csr1
FETCH NEXT FROM csr1 INTO @name
while (@@FETCH_STATUS=0)
BEGIN
SET @name='原架构名.'+@name
EXEC SP_ChangeObjectOwner @name, '新架构名'
fetch next from csr1 into @name
END
CLOSE csr1
DEALLOCATE csr1

--快速查询表的总记录数
SELECT rows FROM sysindexes WHERE id= OBJECT_ID('rpt2014' ) AND indid< 2

--非递归查询树形结构表的所有子节点
WITH Tree AS (
SELECT * FROM dbo .MgrObjType WHERE Id='00000000-A001-0000-0000-000000000000'
UNION ALL
SELECT MgrObjType.* FROM dbo .MgrObjType, Tree WHERE Tree.Id= dbo.MgrObjType .ParentId
)
SELECT * FROM Tree

--清除查询缓存

DBCC FREEPROCCACHE
DBCC DROPCLEANBUFFERS

--跨服务器的数据库查询
SELECT * FROM
OPENDATASOURCE('SQLOLEDB' , 'Data Source=172.18.24.245;User ID=sa;Password=aaa*'). CenterObj_xx.dbo .TableLog AS A