/*set database sang chế độ simple*/
Declare @dbname varchar(200),@sql varchar(200)/*khai báo biến*/
SET @dbname = 'traugia_conon'/*gán tên db*/
set @sql ='alter database '+@dbname+' SET RECOVERY SIMPLE'/*chuyển sang simple*/
exec (@sql)/*thực thi lệnh*/
/*tém nó*/
DBCC SHRINKDATABASE(@dbname,10)/*shrink-->gọn nhẹ không ngờ*/

icrosoft SQL Server 2008 Developer enables developers to build and test applications that run on SQL Server on 32-bit, ia64, and x64 platforms. SQL Server 2008 Developer includes all of the functionality of Enterprise Edition, but is licensed only for development, test, and demo use. The license for SQL Server 2008 Developer entitles one developer to use the software on as many systems as necessary. For rapid deployment into production, instances of SQL Server 2008 Developer can easily be upgraded to SQL Server 2008 Enterprise without reinstallation.

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Expanding powerful BI tools to all users with SQL Server PowerPivot for Excel and empowering a new class of business users to build and share powerful BI solutions with little or no IT support, while still enabling IT to monitor and manage user-generated BI solutions.

SQL.Sever.2008.R2.Developer.Edition.iso.torrent (20,89 kb)

Built on SQL Server Enterprise, SQL Server 2008 R2 Datacenter is designed to deliver a high-performing data platform that provides the highest levels of scalability for large application workloads, virtualization and consolidation, and management for an organization’s database infrastructure. Datacenter helps enable organizations to cost effectively scale their mission-critical environment.

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Enjoy Built-in Business Intelligence for Thousands Users
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*Deliver business insights with controlled access across the enterprise with a suite of self-service business intelligence features and SQL Server Reporting Services
*Share reports quickly and seamlessly through Microsoft Office SharePoint integration – publish directly to a SharePoint library or embed reports directly into SharePoint portal web parts

RELEASE iNFORMATiON
CRACKER: TEAM Z.W.T
SUPPLiER: TEAM Z.W.T
PACKER: TEAM Z.W.T
RELEASE DATE: 04/29/2010
FORMAT: iSO
SiZE: 1 DVD
PLATFORM: WinALL
SOFTWARE TYPE: UTIL
LANGUAGE: ENGLiSH

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Microsoft.SQL.Server.2008.Data.Center.Edition.X86.X64.torrent (64,01 kb)

Có 2 cách để kiểm soát Transaction trong SQL Server
Cách 1: bằng cách kiểm tra biến toàn cục @@ERROR để xác định nếu có lỗi xảy ra thì thực hiện rollback. Đây là cách cổ điển của SQL Server 2000. Điểm bất tiện của nó là sau mỗi câu lệnh SQL, ta phải thực hiện việc kiểm tra giá trị của biến này, để kịp thời rollback.

CREATE PROC For_TransTest
AS
BEGIN
    BEGIN TRANSACTION updatestaff;

    UPDATE aspnet.staff SET fk_department = 30
    WHERE pk_staff = 971;

    IF @@ERROR != 0  -- neu co loi xay ra, rollback 
    BEGIN
        PRINT 'rollback ne';
        ROLLBACK TRAN updatestaff;
    END

    UPDATE aspnet.staff SET fk_department = null
    WHERE pk_staff = 971;

    IF @@ERROR != 0  -- neu co loi xay ra, rollback 
    BEGIN
        PRINT 'rollback ne';
        ROLLBACK TRAN updatestaff;
    END
    ELSE
        COMMIT TRANSACTION updatestaff;

END

CREATE PROC For_TransTest
AS
BEGIN
    BEGIN TRY

        BEGIN TRANSACTION updatestaff;

        UPDATE aspnet.staff SET fk_department = 30
        WHERE pk_staff = 971;

        UPDATE aspnet.staff SET fk_department = null
        WHERE pk_staff = 971;


        COMMIT TRANSACTION updatestaff;
        PRINT 'commited';
    END TRY
    BEGIN CATCH
        PRINT 'rollback ne';
        ROLLBACK TRAN updatestaff;  
    END CATCH
END

Trong Sql Server 2005, lệnh WITH cho phép ta thực hiện một vòng lặp đệ quy. Việc sử dụng nó trên dữ liệu dạng cây sẽ cho thấy tính tiện dụng của lệnh này.

Cấu trúc dữ liệu dạng cây (cha-con) không xa lạ với những người sử dụng máy tính. Trong Sql Server, ta có thể thiết kế một cách rất đơn giản dạng này.

Như trong hình, ta có nhiều category khác nhau, mỗi cái trong số đó lại có một hoặc nhiều con. Vậy mỗi category, ta sẽ có trường ID và Name, mô tả cho category đó. Còn việc tạo ra mối quan hệ cha con, ta phải thêm vào trường Parent_id, trường này sẽ trỏ tới ID của category mà nó phụ thuộc.

Vấn đề đặt ra là làm sao Select được Level của mỗi phần tử một cách nhanh chóng nhất?

Trước tiên, ta sẽ lấy ra các phần tử Root, là những phần tử trên cùng của cây, có Parent_Id bằng Null, và sẽ có level bằng 0.

Select id, name, 0 as aLevel
From Category
Where parent_id is null

Với các phần tử có level bằng 1 thì phải có Parent_Id bằng với ID của phần tử level 0.
Có nghĩa là, phần tử level thứ n, sẽ có Parent_Id bằng với ID của phần tử level thứ n-1.

Lợi dụng điều này, ta sẽ gọi đệ quy dùng WITH để tính level như sau:

WITH temp(id, name, alevel)
as (
        Select id, name, 0 as aLevel
        From Category
        Where parent_id is null
        Union All 
        Select b.id, b.name, a.alevel + 1
        From temp as a, Category as b
        Where a.id = b.parent_id
)
Select * 
From temp

Khi đó,ta sẽ thu được danh sách category với các level tương ứng.