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CMSC424: Database Design PowerPoint PPT Presentation
CMSC424: Database Design - CMSC424: Database Design Instructor: Amol Deshpande amol@cs.umd.edu
CMSC424: Database Design Instructor: Amol Deshpande amol@cs.umd.edu
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CMSC424: Database Design PowerPoint PPT Presentation
CMSC424: Database Design - Title: PowerPoint Presentation Last modified by: Amol Deshpande Created Date: 4/22/2009 7:24:48 PM Document presentation format: On-screen Show Other titles
Title: PowerPoint Presentation Last modified by: Amol Deshpande Created Date: 4/22/2009 7:24:48 PM Document presentation format: On-screen Show Other titles
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CMSC424: Database Design PowerPoint PPT Presentation
CMSC424: Database Design - Title: PowerPoint Presentation Last modified by: Amol Deshpande Created Date: 4/22/2009 7:24:48 PM Document presentation format: On-screen Show Other titles
Title: PowerPoint Presentation Last modified by: Amol Deshpande Created Date: 4/22/2009 7:24:48 PM Document presentation format: On-screen Show Other titles
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CMSC424: Database Design PowerPoint PPT Presentation
CMSC424: Database Design - An object that exists and is distinguishable from other objects. Examples: Bob Smith, BofA, CMSC424. Form entity sets with other entities of the same type ...
An object that exists and is distinguishable from other objects. Examples: Bob Smith, BofA, CMSC424. Form entity sets with other entities of the same type ...
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CMSC424: Review PowerPoint PPT Presentation
CMSC424: Review - CMSC424: Review Database Management Systems Manage data Store data Update data Answer questions about the data What kind of data ? Enterprise data Banking ...
CMSC424: Review Database Management Systems Manage data Store data Update data Answer questions about the data What kind of data ? Enterprise data Banking ...
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CMSC424: Database Design PowerPoint PPT Presentation
CMSC424: Database Design - database design. Entity-Relationship Model. Two key concepts. Entities: ... cust-city. phone no. age. date-of-birth. Relationship Set Keys ...
database design. Entity-Relationship Model. Two key concepts. Entities: ... cust-city. phone no. age. date-of-birth. Relationship Set Keys ...
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CMSC424: Database Design PowerPoint PPT Presentation
CMSC424: Database Design - database design. Entity-Relationship Model. Two key concepts. Entities: ... emp-city. manager. worker. Next: Weak Entity Sets ... Design Issue #2: Entity Sets ...
database design. Entity-Relationship Model. Two key concepts. Entities: ... emp-city. manager. worker. Next: Weak Entity Sets ... Design Issue #2: Entity Sets ...
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CMSC424: Database Design PowerPoint PPT Presentation
CMSC424: Database Design - Star Wars. Faye. King Kong. Watts. King Kong. starName. movieTitle. Issues: ... Star wars. movieYear. movieTitle. Smaller schemas always good ???? Desiredata. No sets ...
Star Wars. Faye. King Kong. Watts. King Kong. starName. movieTitle. Issues: ... Star wars. movieYear. movieTitle. Smaller schemas always good ???? Desiredata. No sets ...
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CMSC424: Database Design PowerPoint PPT Presentation
CMSC424: Database Design - CMSC424: Database Design
CMSC424: Database Design
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CMSC424: Database Design PowerPoint PPT Presentation
CMSC424: Database Design - To express SQL, must extend RA to a bag algebra. Bags (aka: multisets) like sets, but can have duplicates ... Used to name query results ( ) e.g: SELECT ...
To express SQL, must extend RA to a bag algebra. Bags (aka: multisets) like sets, but can have duplicates ... Used to name query results ( ) e.g: SELECT ...
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CMSC424: Database Design PowerPoint PPT Presentation
CMSC424: Database Design - We will also discuss some interesting open problems/research directions ... like searching for a single sentence in the contents of the British Library' ...
We will also discuss some interesting open problems/research directions ... like searching for a single sentence in the contents of the British Library' ...
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CMSC424: Database Design PowerPoint PPT Presentation
CMSC424: Database Design - Indiana Jones. Harrison Ford. 19xx. Witness. Harrison Ford. 198x. Indiana Jones. Harrison Ford. 1977. Star wars. Harrison Ford. 1977. Star wars. StarName. MovieYear ...
Indiana Jones. Harrison Ford. 19xx. Witness. Harrison Ford. 198x. Indiana Jones. Harrison Ford. 1977. Star wars. Harrison Ford. 1977. Star wars. StarName. MovieYear ...
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CMSC424: Database Design PowerPoint PPT Presentation
CMSC424: Database Design - Relational Database Design. Referential Integrity Constraints ... Movies Database Schema. Movie(title, year, length, inColor, studioName, producerC ...
Relational Database Design. Referential Integrity Constraints ... Movies Database Schema. Movie(title, year, length, inColor, studioName, producerC ...
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CMSC424: Database Design PowerPoint PPT Presentation
CMSC424: Database Design - You've just been hired by Bank of America as their DBA for their online banking web site. ... Express the number of entities to which another entity can be ...
You've just been hired by Bank of America as their DBA for their online banking web site. ... Express the number of entities to which another entity can be ...
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CMSC424: Database Design PowerPoint PPT Presentation
CMSC424: Database Design - Many raid 'levels' Different reliability and performance properties. RAID Levels (b) Make a copy of the disks. If one disk goes down, we have a copy. ...
Many raid 'levels' Different reliability and performance properties. RAID Levels (b) Make a copy of the disks. If one disk goes down, we have a copy. ...
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CMSC424: Database Design PowerPoint PPT Presentation
CMSC424: Database Design - Flash memory - limited number of write/erase cycles; non ... Western Digital. 500GB. Weight (max. g): 600g. CMSC424, Spring 2006. 10. CMSC424, Spring 2006 ...
Flash memory - limited number of write/erase cycles; non ... Western Digital. 500GB. Weight (max. g): 600g. CMSC424, Spring 2006. 10. CMSC424, Spring 2006 ...
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CMSC424: Database Design PowerPoint PPT Presentation
CMSC424: Database Design - Introduced by Ted Codd (late 60's early 70's) ... Williams. Adams. Johnson. Glenn. Brooks. Green. ccity. cstreet. cname. Customer. 9M. 2.1M. 1.7M ...
Introduced by Ted Codd (late 60's early 70's) ... Williams. Adams. Johnson. Glenn. Brooks. Green. ccity. cstreet. cname. Customer. 9M. 2.1M. 1.7M ...
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CMSC424: Database Design PowerPoint PPT Presentation
CMSC424: Database Design - R and R. The functional dependency ... the difference between r and R above ? CMSC424, Spring ... E.g. If A B and B C, then we can infer that A C. F (closure of F) ...
R and R. The functional dependency ... the difference between r and R above ? CMSC424, Spring ... E.g. If A B and B C, then we can infer that A C. F (closure of F) ...
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CMSC424: Database Design PowerPoint PPT Presentation
CMSC424: Database Design - from movieExec me, movies m. where me.cert# = m. ... Boston. Downtown. assets. bcity. bname. assets. bcity. bname. Counter-intuitive: select * from movies ...
from movieExec me, movies m. where me.cert# = m. ... Boston. Downtown. assets. bcity. bname. assets. bcity. bname. Counter-intuitive: select * from movies ...
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CMSC424: Database Design PowerPoint PPT Presentation
CMSC424: Database Design - Provide a mechanism to hide certain data from the view of certain users. ... Create a view of all loan data in loan relation, hiding the amount attribute ...
Provide a mechanism to hide certain data from the view of certain users. ... Create a view of all loan data in loan relation, hiding the amount attribute ...
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CMSC424: Database Design PowerPoint PPT Presentation
CMSC424: Database Design - Query: Find customers who have accounts in all branches in ... (deletes all Perry accounts) 2. Insertion: r r s. e.g., branch branch {(Waltham, Boston, 7M) ...
Query: Find customers who have accounts in all branches in ... (deletes all Perry accounts) 2. Insertion: r r s. e.g., branch branch {(Waltham, Boston, 7M) ...
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Transactions PowerPoint PPT Presentation
Transactions - Example Schedule (Schedule A) + Precedence Graph T1 T2 T3 T4 T5 read(X) read(Y) read(Z) read(V) read(W) read(W) read(Y) write(Y) write(Z) read(U ...
Example Schedule (Schedule A) + Precedence Graph T1 T2 T3 T4 T5 read(X) read(Y) read(Z) read(V) read(W) read(W) read(Y) write(Y) write(Z) read(U ...
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Wrapup PowerPoint PPT Presentation
Wrapup - Easy to make things complicated, very hard to keep them simple ... form of storage comes along with different properties (say holographic storage ? ...
Easy to make things complicated, very hard to keep them simple ... form of storage comes along with different properties (say holographic storage ? ...
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Transactions PowerPoint PPT Presentation
Transactions - Consistency: Transaction, executed completely, takes database from one ... As much concurrency as possible, while not compromising isolation and/or consistency ...
Consistency: Transaction, executed completely, takes database from one ... As much concurrency as possible, while not compromising isolation and/or consistency ...
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Concurrency Control PowerPoint PPT Presentation
Concurrency Control - Release exclusive locks only at the very end, just before commit or abort ... The serializability order === the commit order. More intuitive behavior for the users ...
Release exclusive locks only at the very end, just before commit or abort ... The serializability order === the commit order. More intuitive behavior for the users ...
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CMSC 424 PowerPoint PPT Presentation
CMSC 424 - ... simple database, just giving names and incoming telephone number, but it helps ... Superkey: set of attributes whose values uniquely identify the entity ...
... simple database, just giving names and incoming telephone number, but it helps ... Superkey: set of attributes whose values uniquely identify the entity ...
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Recovery PowerPoint PPT Presentation
Recovery - How do we guarantee Atomicity and Durability ? Atomicity: Two problems ... System may crash, but the disk is durable ... Guaranteeing durability becomes hard ...
How do we guarantee Atomicity and Durability ? Atomicity: Two problems ... System may crash, but the disk is durable ... Guaranteeing durability becomes hard ...
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Review of the EntityRelationship Model PowerPoint PPT Presentation
Review of the EntityRelationship Model - You've just been hired by Bank of America as their DBA for their online banking web site. ... Both, but more of a noun to a bank. ( hence (a) probably more ...
You've just been hired by Bank of America as their DBA for their online banking web site. ... Both, but more of a noun to a bank. ( hence (a) probably more ...
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Wrapup PowerPoint PPT Presentation
Wrapup - Easy to make things complicated, very hard to keep them simple ... How/where to store data, how to access it. Need to be cognizant of the memory hierarchy ...
Easy to make things complicated, very hard to keep them simple ... How/where to store data, how to access it. Need to be cognizant of the memory hierarchy ...
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