... ANSI.
• SQL có thể thực thi các câu truy vấn trên CSDL.
• SQL có thể lấy dữ liệu từ CSDL.
• SQL có thể chèn dữ liệu mới vào CSDL.
• SQL có thể xoá dữ liệu trong CSDL.
• SQL có thể sửa đổi dữ liệu ... đổi dữ liệu trong bảng.
• DELETE - xoá dữ liệu trong bảng.
• INSERT INTO - thêm dữ liệu mới vào bảng.
SQL là ngôn ngữ định nghĩa dữ liệu (DDL - Data Definition Language)
Phần DDL của SQL cho ... xem: 548
SQL là chuẩn ngôn ngữ ANSI để truy cập CSDL.
SQL là gì?
• SQL là viết tắt của Structured Query Language - Ngôn ngữ truy vấn cấu trúc.
• SQL cho phép bạn truy cập vào CSDL.
• SQL là một...
... Thiệu SQL Server 2000
SQL Server 2000 là một hệ thống quản lý cơ sở dữ liệu (Relational
Database Management System (RDBMS) ) sử dụng Transact -SQL để trao đổi dữ
liệu giữa Client computer và SQL ... Cursor bằng vòng lặp WHILE bằng
Bài 2: Giới Thiệu Sơ Lược Về Transact SQL (T -SQL)
Transact -SQL là ngôn ngữ SQL mở rộng dựa trên SQL chuẩn của ISO
(International Organization for Standardization) ...
Standards Institute) được sử dụng trong SQL Server khác với P -SQL (Procedural-
SQL) dùng trong Oracle.
Trong bài này chúng ta sẽ tìm hiểu sơ qua về T -SQL. Chúng được chia làm 3 nhóm:
2.1. Data...
... thực
hiện
DBMS _SQL. PARSE(cursor_name, SQLstring,
DBMS _SQL. NATIVE);
ret := DBMS _SQL. EXECUTE(cursor_name);
DBMS _SQL. CLOSE_CURSOR(cursor_name);
END;
4. Xem lý thuyết mục 4 (chương SQL động).
... ret INTEGER;
SQLstring VARCHAR2(100);
BEGIN
cursor_name := DBMS _SQL. OPEN_CURSOR;
SQLString:=’DROP TABLE EMP’;
Lệnh DDL được thực thi bởi thủ tục...
... database SQL Server 2005 relational database
Multidimensional database SQL Server 2000
Analysis Services
SQL Server 2005
Analysis Services
Data mining SQL Server 2000 Analysis Services SQL Server ... reserved.
Page 4
Component SQL Server 2000 SQL Server 2005
Extract, transformation, and load Data Transformation Services (DTS) SQL Server 2005 Integration Services
Relational data warehouse SQL Server 2000 ... SQL 2000 and SQL 2005 BI
Components
The following table summarizes the differences between the BI components of SQL Server 2000 and SQL
server 2005.
Source: http://www.microsoft.com /sql/ solutions/bi/featurecompare.mspx
In...
... giống nhau về mặt dữ liệu.
Chú ý : Trong UNION những giá trị giống nhau sẽ là duy nhất (Coi như có câu lệnh
DISTINCT ) .
Cú pháp :
Trích:
SQL Statement 1
UNION
SQL Statement 2
Create ... Phần 2 SQL Advanced (bài 6)
SQL UNION and UNION ALL
Câu lệnh UNION được sử dụng để select (lựa chọn) những thông ... Employees_Norway
UNION
SELECT E_Name FROM Employees_USA
Bạn chú ý nhé , 2 câu select thì dữ liệu phải tương ứng nhau !
...
...
SQL
Server easily.
Cmdlets
In
SQL
Server 2008, there are five cmdlets shipped with the provider:
Convert-UrnToPath
Decode-SqlName
Encode-SqlName
Invoke-PolicyEvaluation
Invoke-Sqlcmd
Licensed ... features new to
SQL
Server 2005 and
SQL
Server 2008.
In
SQL
Server 2008, Microsoft added the ability to launch a PowerShell window
from the Object Explorer window of
SQL
Server Management ... the following:
cd sqlserver: \sql\ sql08\default\Databases
dir | Select Name | Format-Table
To work with the system databases we need to use
Get-Item
:
Get-Item .
cd master
Invoke-Sqlcmd -Query "SELECT...
... working with
SQL
Server for more than
eight years and has been a Microsoft
MVP
for
SQL
Server for the
past six years. He also runs http:
//www.sqldbatips.com, home of
popular free
SQL
tools ... [string]$bckfile='C:\MSSQL.2\MSSQL\Backup\AdventureWorks_db_20071227175
➥
004.bak'
)
# Load SMO assembly, and if we're running SQL 2008 DLLs load the
➥
SMOExtended and SQLWMIManagement ... [System.Reflection.Assembly]::LoadWithPartialName('Microsoft.SqlServer.
➥
SMOExtended') | out-null
[System.Reflection.Assembly]::LoadWithPartialName('Microsoft.SqlServer.
➥
SQLWMIManagement') | out-null
...
... partitioning topics, see
SQL
Server
Books Online, for both
SQL
Server 2008 and 2005. Find the Partitioned Tables
category in the Books Online Index tab.
For a full discussion of
SQL
Server 2005 ... performance)
The difference in query plans between
SQL
Server 2005 and
SQL
Server 2008 with
regard to partitioned index seeks is noteworthy. At first glance, the
SQL
Server 2008
plan listed in figure ... using Microsoft
SQL
Server with version
4.21a on Windows
NT
3.1 after several years as a mainframe
DBA
. He’s been a
SQL
Server
MVP
since 2000, helping out in
online
SQL
Server communities...
... (objFSO.FileExists("E:\LogShipFolder\scripts \SQL\ " &
➥
strDatabaseName & " .sql& quot;)) Then
objFSO.DeleteFile ("E:\LogShipFolder\scripts \SQL\ " &
➥
strDatabaseName & " .sql& quot;) ... mirroring?
SQL
Server 2005 introduced database mirroring, and
SQL
Server 2008 enhanced it.
Back in the pre-
SQL
Server 2005 days, you had several choices for high availability
solutions with
SQL
... dedicated
SQL
Server support
business—and also Australian Director of SQLskills, a specialist provider of
SQL
Server training. Greg has worked in a range of developer and
DBA
capacities with
SQL
Server...
... MSSQLSVC/vDataTier SSTB\Service _SQL
setspn.exe -A MSSQLSVC/vDataTier.SSTD.local SSTB\Service _SQL
This
SQL
Server is installed as a default instance, and therefore listens on port 1433
for
SQL
... instance of
SQL
Server were configured on port 2433, then the
registrations would change to look like this:
setspn.exe -A MSSQLSVC/vDataTier:2433 SSTB\Service _SQL
setspn.exe -A MSSQLSVC/vDataTier.SSTD.local:2433 ... Files\Support Tools>setspn -l Service _SQL
Registered ServicePrincipalNames for
CN=Service _SQL, CN=Users,DC=SSTB,DC=local:
MSSQLSVC/vdatatier.sstb.local:1433
MSSQLSVC/vdatatier:1433
In the first...
... authenti-
cation in SQL Server Connections
Microsoft SQL Server Protocols team
http://blogs.msdn.com /sql_ protocols/archive/2006/12/02/
understanding-kerberos-and-ntlm-authentication-in -sql- server-
connections.aspx
Table ... virtual
SQL
Server
instance as being like a physical
SQL
Server instance. The real value of
SQL
Server back-
ups is the ability to do point-in-time recovery. This requires true
SQL
Server ... although Scott has managed systems with
early version
SQL
Server on
OS
/
2
, he really started digging
deep into
SQL
Server with the release of
SQL
Server 6.5. With a
keen interest in continuous...
... intro-
duced in
SQL
Server 2005, and enhanced in
SQL
Server 2008. Back in the pre–
SQL
Server 2005 days, it was much more difficult to find out what was happening inside
of
SQL
Server when ... help ensure that all
the
SQL
and
T -SQL
code used in your application performs optimally.
Getting started with PerfMon and Profiler
To get useful information about your SQL Server’s behavior, ...
SQL
Server instances, tempdb can
significantly affect
SQL
Server’s performance.
DBA
s can act to ensure that tempdb
performance is optimized and to optimize the overall performance of
SQL
...
... ********************************************************************
spid51 ***Stack Dump being sent to C:\Program Files\Microsoft SQL
Server\MSSQL10.MSSQLSERVER\MSSQL\LOG\SQLDump0002.txt
spid51 *
spid51 * User initiated stack dump. This is not a ... Session
CREATE EVENT SESSION GetLongRunningQueries ON SERVER
ADD EVENT sqlserver .sql_ statement_completed(
ACTION (sqlserver .sql_ text)
WHERE sqlserver.database_id=1 AND duration > 20000);
GO
Add Event ... is common to see
SQL
Server read-ahead reads posting
I/O
requests that are greater than 128
KB
in size.
SQL
Server 2005 and
SQL
Server 2008
are more aggressive than
SQL
Server 2000...