CS 3630 Database Design and Implementation

Your Oracle Account• UserName is the same as your UWP username• Followed by @EDDB• Not case sensitive

• Initial Password: UWPUserName1 (all lower case)

Example: yangq1• Password is case sensitive

• Reset password• Email to HelpDesk at helpdesk@uwplatt.edu from

your UWP email account if you forget your new password

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Oracle Client SQL*Plus

• SQL*Plus

• Oracle 11.2.0.1.0

• All labs in Ullrich Hall

• Not available from home or any other lab on campus

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Structured Query Language (SQL)

• One language for Relational Databases

• ANSI Standard

• Oracle: SQL*Plus

• MS SQL Server: Transact-SQL

• IBM DB2

• MySQL

• Sybase

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Structured Query Language (SQL)

• Case insensitive (like VB)• Free style (like C++ and Java)• Statement terminator – semicolon (like C++ and Java)• Programming Rule: Style

Each clause of a query on a separate line• When creating tables

Each field on a separate line

Each table constraint on a separate line

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Structured Query Language (SQL)

• DDL (Data Definition Language)

Create Table (user) ...

Drop Table (user) ...

Alter Table (user) ...

• DML (Data Manipulation language)

Select * From Branch …

Insert into Branch ...

Update branch ...

Delete from BRANCH ... 6

Change Your Oracle Passwordinside Oracle

-- Oracle Command Prompt

SQL>

-- Change your password

-- Remember your new password!

SQL> Alter User yourUserName identified by newPassword;

-- Every ANSI SQL standard command ends with ;

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Oracle Data Types

• Char(size)

fixed length string

up to 2000 bytes

default is 1 byte

blanks are padded on right when fewer chars entered

• Varchar2(size)

variable size string

up to 2000 bytes

must specify the limit (size)

• Varchar(size)

same as Varchar2(size)

better to use Varchar2

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Oracle Data Types

• Integer, int, smallint

• Float

• Date

Valid dates from 1-Jan-4712 B.C. to 31-Dec-4712 A.D.

Default format: DD-MON-YY

23-Mar-09

Including time

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Oracle Data Types

• Number(l, d) l: length (total) d: decimal digits number (5, 2): largest value is 999.99 • Decimal(l, d), Numeric(l, d) same as number(l, d) SQL standard • blob: binary large object, up to 4 GB• clob: character large object, up to 4 GB• raw(size): raw binary data, up to 2000 bytes • ...

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Create a Table

SQL> Create Table Test1 (

C1 char(5) Primary Key,

C2 Varchar2(50),

C3 Integer,

C4 Date);

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Show Table Schema

SQL> Describe Test1

Or

SQL> Desc Test1

Describe is a SQL*Plus command and no semicolon is required.

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Insert Records

Insert into Test1

Values (‘cs363', ‘s1', 44, ‘28-feb-12’);

Insert into Test1

Values (‘cs334', ‘s2', 45, ‘29-feb-12’);

One record at a time!

Single quotes for string

Date is entered as string

in the default format

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Retrieve Records

Select * From test1;

-- Each clause on a separate line

Select *

From Test1;

-- to start a comment line

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Entity Integrity

Insert into Test1

Values (‘cs363', ‘q2', 17, ‘2-Mar-12’);

PK must be Unique!

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Null Values

Insert into Test1

Values (‘cs387', ‘q2', 17, null);

Null is a key word, not a string!

NULL, null and Null are the same

SQL is not case sensitive

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Entity Integrity

Insert into Test1

Values (null, ‘q2', 17, ‘2-Mar-12’);

PK cannot be null!

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Command Commit

• DDL commands are sent back to server and executed there

• DML commands are executed at client site

• Use commit to send results back to server

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Update Records

Update test1

Set c3 = 50

Where c1 = ‘cs363’;

-- Each clause on a separate line

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Delete Records

Delete from test1

Where c1 = ‘cs363’;

-- select to check

Delete from test1;

-- select to check

-- desc to check

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Drop Table

Drop table test1;

Desc test1

-- to check

ERROR:

ORA-04043: object test1 does not exist

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Log out

SQL> exit

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Remember Your Password!

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Quiz2

Any Questions?

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Assignment62

Any Questions?

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