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Transcript 
SQL Server
MS SQL Server 2005
Integration Services
Εντολές
Καθορισµός σχήµατος
CREATE object_type object_name
ALTER object_type object_name
DROP object_type object_name
Χειρισµός ∆εδοµένων
SELECT
INSERT
UPDATE
DELETE
Τύποι ∆εδοµένων
Integers
(-263 263-1)
bigint
int (-231 231-1)
smallint
(-215 215-1)
tinyint
(0 – 255)
Character Strings
char
(8.000 chars)
varchar
(8.000 chars)
text
(231-1 chars)
Unicode Character Strings
Bit
nchar
(4.000 chars)
Decimal (Fix Scale, Precision)
nvarchar
(4.000 chars)
text
(230-1 chars)
sysname
=nvarchar(128)
numeric
float
binary
(8.000 bytes)
real
varbinary
(8.000 bytes)
= decimal
image
(231-1 bytes)
Money (Precision=10-4)
decimal
(-1038 1038-1) ,(Fix
Scale, Precision)
money
(-263 263-1)
smallmoney
(~-218
218-1)
Date
datetime
(3.33 msecs)
smalldatetime (1 min)
Binary
Other Data Types
table
timestamp
uniqueidentifier
Παραγόµενες Μοναδικές Τιµές
Τύπος IDENTITY
(παράγει τοπικά µοναδικές τιµές: 1, 2, 3,…)
CREATE
CREATE TABLE
TABLE dbo.Categories
dbo.Categories ((
CategoryID
CategoryID int
int IDENTITY
IDENTITY (1,1)
(1,1) NOT
NOT NULL,
NULL,
CategoryName
CategoryName nvarchar(15)
nvarchar(15) NOT
NOT NULL,
NULL,
Description
Description text,
text,
Picture
Picture image)
image)
Επιτρέπεται µόνο ένα IDENTITY πεδίο σε ένα table
Χρησιµοποιείται ΜΟΝΟ σε πεδία integer, numeric, decimal
Η µεταβλητή @@identity δίνει την τελευταία τιµή που
αποδόθηκε
Παραγόµενες Μοναδικές Τιµές
Τύπος uniqueidentifier και συνάρτηση NEWID
(Παράγει globally µοναδικές τιµές,
π.χ. {210053ED-FDE1-40CB-9108-702816D7DF6C})
CREATE
CREATE TABLE
TABLE Customer
Customer
(CustID
(CustID uniqueidentifier
uniqueidentifier NOT
NOT NULL
NULL DEFAULT
DEFAULT
NEWID(),
NEWID()
NEWID(),
CustName char(30)
char(30) NOT
NOT NULL)
NULL)
NEWID() CustName
Χρησιµοποιείται πάντα µετά από DEFAULT
Client-Server Communication Process
1
Query
Query
Result
Result Set
Set
Database
Database API
API
(OLE
DB,
ODBC,
(OLE DB, ODBC,
DB-Library)
DB-Library)
2
Client
SQL
SQL Server
Server
Server
Server Net-Libraries
Net-Libraries
Client
Client Application
Application
Client
Client Net-Library
Net-Library
3
Open
Open Data
Data Services
Services
Query
Query
5
Result
Result Set
Set
Relational
Relational
Engine
Engine
Server
4
Storage
Storage Engine
Engine
Processor
Processor
Memory
Memory
Local
Database
Login Authentication
AUTHENTICATION
Windows
Windows
Group
Groupor
orUser
User
SQL Server
Verifies
Trusted Connection
Windows Domain
SQL
Server
OR
SQL
SQLServer
Server
Login
LoginAccount
Account
SQL Server
Verifies Name
and Password
Κλήση SQL Server από πρόγραµµα JAVA (JDBC)
Connection
Connection con
con == DriverManager.getConnection(
DriverManager.getConnection(
““jdbc:microsoft:sqlserver://127.0.0.1:1433;DatabaseName=db1”
jdbc:microsoft:sqlserver://127.0.0.1:1433;DatabaseName=db1
jdbc:microsoft:sqlserver://127.0.0.1:1433;DatabaseName=db1”
jdbc:microsoft:sqlserver://127.0.0.1:1433;DatabaseName=db1””,,
””myuser",
myuser
mypassword
myuser",
myuser",
", ””mypassword"
mypassword"
mypassword"");
); //
// connect
connect
Statement
createStatement();
createStatement
Statement stmt
stmt == con.createStatement
con.createStatement
createStatement();
createStatement
ResultSet
("SELECT
ResultSet rs
rs == stmt.executeQuery("SELECT
stmt.executeQuery("SELECT
("SELECT COF_NAME,
COF_NAME, PRICE
PRICE FROM
FROM
COFFEES");
COFFEES");
while
while (rs.next())
(rs.next()) {{
System.out.println(rs.getString
rs.getString("COF_NAME")
++ "" || “);
rs.getString
System.out.println(rs.getString
rs.getString("COF_NAME")
“);
rs.getString
System.out.println(rs.getFloat
rs.getFloat("PRICE");s
+
"
|
“);
rs.getFloat
System.out.println(rs.getFloat
rs.getFloat("PRICE");s
+ " | “);
rs.getFloat
}}
Κλήση SQL Server από πρόγραµµα VB.NET (ADO)
Dim
Dim sqlConn
sqlConn As
As New
New SqlConnection(
SqlConnection(
““server=127.0.0.1;Trusted_Connection=No;database
server=127.0.0.1;Trusted_Connection=
No;database
server=127.0.0.1;Trusted_Connection=No;database
No;database=db1;
=db1;
server=127.0.0.1;Trusted_Connection=No;database=db1;
No;database=db1;
user=myuser;password
myuser;password=
=
mypassword”)
//
connect
user=
myuser;password
mypassword
user=myuser;password
// connect
user=myuser;password=
myuser;password=mypassword”)
mypassword
Dim
sqlComm
=
New
SqlCommand("SELECT
SELECT
Films
Dim sqlComm = New SqlCommand("SELECT
SELECT ** FROM
FROM Films",
Films",
sqlConn)
Films sqlConn)
Dim
sqlReader
=
sqlComm.ExecuteReader
ExecuteReader()
ExecuteReader
Dim sqlReader = sqlComm.ExecuteReader
ExecuteReader()
ExecuteReader
Do
While
(sqlReader.Read())
Do While (sqlReader.Read())
Console.Write(sqlReader("film_ID")
sqlReader("film_ID").ToString()
++ ““ || ")
sqlReader("film_ID")
Console.Write(sqlReader("film_ID")
sqlReader("film_ID").ToString()
")
sqlReader("film_ID")
Console.Write(sqlReader("title")
sqlReader("title").ToString()
+
"
|
")
sqlReader("title")
Console.Write(sqlReader("title")
sqlReader("title").ToString()
+ " | ")
sqlReader("title")
Console.Write(sqlReader("director")
sqlReader("director").ToString()
++ "" || ")
sqlReader("director")
Console.Write(sqlReader("director")
sqlReader("director").ToString()
")
sqlReader("director")
Console.WriteLine(sqlReader("year_produced")
sqlReader("year_produced").ToString())
sqlReader("year_produced")
Console.WriteLine(sqlReader("year_produced")
sqlReader("year_produced").ToString())
sqlReader("year_produced")
Loop
Loop
Οδηγίες για την Εργασία
Επιλογή DBMS/γλώσσας ελεύθερη:
Win2000/XP/2003 SQL Server 2005/2000 Developer Edition
Win 98/ΜΕ SQL Server 2000 Personal Edition
Linux postgres/mysql
SQL Server 2005 ΒΙΒΛΙΟΘΗΚΗ ΗΛΕΚΤΡΟΛΟΓΩΝ.
Εξέταση Εργασίας
SQL Vs. Application
Λίστα [email protected]
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