CS 3630 Database Design and Implementation

Your Oracle Account UserName is the same as your UWP username Followed Not case sensitive Initial Password: UWPUserName1 (all lower case) Example: yangq1 Password is case sensitive Reset password to HelpDesk at from your UWP account if you forget your new password 2

Oracle Client SQL*Plus SQL*Plus Oracle All labs in Ullrich Hall Not available from home or any other lab on campus 3

Structured Query Language (SQL) One language for Relational Databases ANSI Standard Oracle: SQL*Plus MS SQL Server: Transact-SQL IBM DB2 MySQL Sybase... 4

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 5

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 Password inside 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 ; 7

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 8

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 9

Oracle Data Types Number(l, d) l: length (total) d: decimal digits number (5, 2): largest value is 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... 10

Create a Table SQL> Create Table Test1 ( C1 char(5) Primary Key, C2 Varchar2(50), C3 Integer, C4 Date); 11

Show Table Schema SQL> Describe Test1 Or SQL> Desc Test1 Describe is a SQL*Plus command and no semicolon is required. 12

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 13

Retrieve Records Select * From test1; -- Each clause on a separate line Select * From Test1; -- to start a comment line 14

Entity Integrity Insert into Test1 Values (‘cs363', ‘q2', 17, ‘2-Mar-12’); PK must be Unique! 15

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 16

Entity Integrity Insert into Test1 Values (null, ‘q2', 17, ‘2-Mar-12’); PK cannot be null! 17

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 18

Update Records Update test1 Set c3 = 50 Where c1 = ‘cs363’; -- Each clause on a separate line 19

Delete Records Delete from test1 Where c1 = ‘cs363’; -- select to check Delete from test1; -- select to check -- desc to check 20

Drop Table Drop table test1; Desc test1 -- to check ERROR: ORA-04043: object test1 does not exist 21

Log out SQL> exit 22

Remember Your Password! 23

Quiz2 Any Questions? 24

Assignment62 Any Questions? 25