Introduction to Oracle
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Transcript of Introduction to Oracle
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Introduction to Oracle
Database SystemsPresented by Rubi Boim
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Agenda Bureaucracy…
Database architecture overview
Buzzwords
SSH Tunneling
Intro to Oracle
Comments on homework
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Homework #1 Submission date is November 17. (No late arrivals
will be accepted)
Work should be done in pairs
Please, please, please, names and ID on the submittals.
Submit Hardcopies to Rubi’s mailbox
USE THE FORMAT DESCRIBED IN THE ASSIGNMENT
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Project Hard work, but real. Work in groups of 4 Project goal: to tackle and resolve real-life DB
related development issues One Two stages. Use JAVA (SWT)
Thinking out of the box will be rewarded
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Agenda Bureaucracy…
Database architecture overview
Buzzwords
SSH Tunneling
Intro to Oracle
Comments on homework
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DB System from lecture #1
Data files
Database server(someone else’s
C program) Applications
connection(ODBC, JDBC)
“Two tier database system”
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1,2,3 tiers
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Abstractly (DB) system layers may include
Application
DB infrastructure
DB driver
DB engine
Storage
Transport
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Why?
DB programmer
App programmer
DBA
Gui designerTester
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Application layer Why should it actually use
database? Persistence layer Access data storage Interfacing between systems Large volumes Scalability Redundancy
Application
DB infrastructure
DB driver
DB engine
Storage
Transport
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Infrastructure layer Goals:
Database “hiding” Schema abstraction Encapsulation of db mechanisms
How: (In two words)
Application
DB infrastructure
DB driver
DB engine
Storage
Transport
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Application
DB infrastructure
DB driver
DB engine
Storage
Transport
DB driver / bridge Used for:
API for database connectivity Protocol converter Performance improvements Transaction management
Examples: In a minute…
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Transport Mainly TCP but not only Secure Efficient Fast but not fast enough
Application
DB infrastructure
DB driver
DB engine
Storage
Transport
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DB engine Total management of the DB
environment including Security Scalability Fault tolerant (disaster management) Monitoring Services
Large DB engines include Microsoft SQL Server, Oracle, SyBase, MySQL, etc.
Application
DB infrastructure
DB driver
DB engine
Storage
Transport
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DB engine (2)DB engine management includes:
Databases/Tables/FieldsCreation/removal/modification/
optimization Connections/Users/RolesSecurity/monitoring/logging Jobs/Processes/ThreadsScheduling/balancing/managing
Application
DB infrastructure
DB driver
DB engine
Storage
Transport
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Storage NAS/SAN, Raid and other stuff…
(sorry… not in this course)
Application
DB infrastructure
DB driver
DB engine
Storage
Transport
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Agenda Bureaucracy…
Database architecture overview
Buzzwords
SSH Tunneling
Intro to Oracle
Comments on homework
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Terms… ODBC ADO OLE-DB MDAC/UDA JDBC ORM
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ODBC, OLEDB and ADO Various standards have been developed for
accessing database servers. Some of the important standards are
ODBC (Open Database Connectivity) is the early standard for relational databases.
OLE DB is Microsoft’s object-oriented interface for relational and other databases.
ADO (Active Data Objects) is Microsoft’s standard providing easier access to OLE DB data for the non-object-oriented programmer.
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ODBC
Open Database Connectivity (ODBC) is a standard software API method for using database management systems (DBMS)
Maximum interoperability
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ODBCExamples of common tasks:
Selecting a data source and connecting to it.
Submitting an SQL statement for execution.
Retrieving results (if any). Processing errors. Committing or rolling back the transaction
enclosing the SQL statement. Disconnecting from the data source.
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MDAC… UDA UDA (Universal Data Access) and/or
MDAC (Microsoft Data Access Components) include (ADO), OLE DB, and (ODBC).
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JDBC Java DB connectivity API Similar to ODBC Why do you need it:
Pure Java Simple API Well….Multi-platform
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JDBC API includes:
DriverManager, Connection, Statement, PreparedStatement, CallableStatement, ResultSet, SQLException, DataSource
JDBC Type Driver: Type 1 - (JDBC-ODBC Bridge) drivers. Type 2 - native API for data access which provide Java
wrapper classes Type 3 - 100% Java, makes use of a middle-tier between the
calling program and the database.. Type 4 - They are also written in 100% Java and are the
most efficient among all driver types. Calls directly into the vendor-specific database protocol.
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JDBC Types
Type 1 Type 2 Type 3 Type 4
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ORM Object-Relational mapping is a
programming technique for converting data between incompatible type systems in relational databases and object-oriented programming languages.
For example: Hibernate, EJB3.0, JDO
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Agenda Bureaucracy…
Database architecture overview
Buzzwords
SSH Tunneling
Intro to Oracle
Comments on homework
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Welcome to
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SSH
Application
DB infrastructure
DB bridge/driver
Transport (TCP)
DB engine ServerMachine
ClientMachine
Standard way Using Tunnel
Application
DB infrastructure
DB bridge/driver
DB engine ServerMachine
ClientMachine
Tunnel machine(SSH server)
proxy
ProxyMachineTCP
SSH
TCP
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SSH in TAUApplication
DB infrastructure
Db bridge/driver
DB engine
Tunnel machine(SSH server)
proxy
YOUR MACHINEdefine DB at localhost, port 1555
Nova.cs.tau.ac.il
orasrv port 1521
Putty connects to nova andforward local port 1555 to orasrv port 1521
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SSH in TAU
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Agenda Bureaucracy…
Database architecture overview
Buzzwords
SSH Tunneling
Intro to Oracle
Comments on homework
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Products we will be using Oracle database – (at home express edition) SQLDeveloper
Free to download on oracle.com(required to create an oracle account)
XE – under “Database”SQLDeveloper – under “Middleware
Developer Tools”
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Server settings.. Host: localhost/orasrv Port: 1521 SID: xe/csodb/other? Schema system/hr/specificuser/
Use the connection guide (link on the course slides page) for instruction on how to create a DB user:
TAU HR user / password: hr_readonly / tiger
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HR vs HR_Readonly
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Oracle Express Edition (XE)
Installation only at home…
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XE Database DEMO
Installation Create a user Run a script Query Other database objects Administration tasks
Similar tutorial can be found in http://st-curriculum.oracle.com/tutorial/DBXETutorial/index.htm
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Database Homepage DemoDemo..
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SQL*plus DemoDemo..
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SQLDeveloper demo
Invoking (TAU):sqldeveloper
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Agenda Bureaucracy…
Database architecture overview
Buzzwords
SSH Tunneling
Intro to Oracle
Comments on homework
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Homework Notes SQL functions and arithmetic conditions. ‘strings‘ LIKE (%), LOWER Use the Syntax help in Query browser MAX, MIN IN
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Thank you