ogicalFileName = 'tablename_log', -- 日志文件名
@MaxMinutes =
10, -- Limit on time allowed to wrap log.
@NewSize =
1 -- 你想设定的日志文件的大小(M)
Setup / initialize
DECLARE @OriginalSize int
SELECT @OriginalSize = size
FROM sysfiles
WHERE name = @LogicalFileName
SELECT 'Original Size of ' + db_name() + ' LOG is ' +
CONVERT(VARCHAR(
30),@OriginalSize) + ' 8K pages or ' +
CONVERT(VARCHAR(
30),(@OriginalSize*
8/
1024)) + 'MB'
FROM sysfiles
WHERE name = @LogicalFileName
CREATE TABLE DummyTrans
(DummyColumn char (
8000) not null)
DECLARE @Counter INT,
@StartTime DATETIME,
@TruncLog VARCHAR(
255)
SELECT @StartTime = GETDATE(),
@TruncLog = 'BACKUP LOG ' + db_name() + ' WITH TRUNCATE_ONLY'
DBCC SHRINKFILE (@LogicalFileName, @NewSize)
EXEC (@TruncLog)
-- Wrap the log if necessary.
WHILE @MaxMinutes > DATEDIFF (mi, @StartTime, GETDATE()) -- time has not expired
AND @OriginalSize = (SELECT size FROM sysfiles WHERE name = @LogicalFileName)
AND (@OriginalSize *
8 /
1024) > @NewSize
BEGIN -- Outer loop.
SELECT @Counter =
0
WHILE ((@Counter < @OriginalSize /
16) AND (@Counter <
50000))
BEGIN -- update
INSERT DummyTrans VALUES ('Fill Log') DELETE DummyTrans
SELECT @Counter = @Counter +
1
END
EXEC (@TruncLog)
END
SELECT 'Final Size of ' + db_name() + ' LOG is ' +
CONVERT(VARCHAR(
30),size) + ' 8K pages or ' +
CONVERT(VARCHAR(
30),(size*
8/
1024)) + 'MB'
FROM sysfiles
WHERE name = @LogicalFileName
DROP TABLE DummyTrans
SET NOCOUNT OFF
8、更改某个表 exec sp_changeobjectowner 'tablename','dbo'
9、存储更改全部表 CREATE PROCEDURE dbo.User_ChangeObjectOwnerBatch
@OldOwner as NVARCHAR(
128),
@NewOwner as NVARCHAR(
128)
AS
DECLARE @Name as NVARCHAR(
128)
DECLARE @Owner as NVARCHAR(
128)
DECLARE @OwnerName as NVARCHAR(
128)
DECLARE curObject CURSOR FOR
select 'Name' = name,
'Owner' = user_name(uid)
from sysobjects
where user_name(uid)=@OldOwner
order by name
OPEN curObject
FETCH NEXT FROM curObject INTO @Name, @Owner
WHILE(
@@FETCH_STATUS=
0)
BEGIN
if @Owner=@OldOwner
begin
set @OwnerName = @OldOwner + '.' + rtrim(@Name)
exec sp_changeobjectowner @OwnerName, @NewOwner
end
-- select @name,@NewOwner,@OldOwner
FETCH NEXT FROM curObject INTO @Name, @Owner
END
close curObject
deallocate curObject
GO
10、SQL SERVER中直接循环写入数据 declare @i int
set @i=
1
while @i<
30
begin
insert into test (userid) values(@i)
set @i=@i+
1
end
案例：
有如下表，要求就裱中所有?有及格的成?，在每次增?0.1的基?上，使他??好及格:
Name score
Zhangshan
80
Lishi
59
Wangwu
50
Songquan
69
while((select min(score) from tb_table)<
60)
begin
update tb_table set score =score*
1.01
where score<
60
if (select min(score) from tb_table)>
60
break
else
continue
end
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