'Find names' diaporamas de présentation

Integrity Constraints

Integrity Constraints. An important functionality of a DBMS is to enable the specification of integrity constraints and to enforce them. Knowledge of integrity constraints is also useful for query optimization. Examples of constraints: keys, superkeys foreign keys

827 views • 46 slides

Integrity Constraints

Integrity Constraints. An important functionality of a DBMS is to enable the specification of integrity constraints and to enforce them. Knowledge of integrity constraints is also useful for query optimization. Examples of constraints: keys, superkeys foreign keys

704 views • 46 slides

Database Systems ( ????? )

Database Systems ( ????? ). October 15/17, 2007 Lecture #4. Course Administration. Assignment #1 is due today (outside 336/338). Assignment #2 will be out on the home webpage. It is due two weeks from today. Course slides will now have black background

582 views • 46 slides

Database Systems

505 views • 46 slides

Database Systems

Database Systems. 10/8/2014 Lecture #4. Reflection: DB design. Step 1: Requirements Analysis What data to store in the database? Step 2: Conceptual Database Design Come up with the design: Entity-Relation (ER) model Sketch the design with entity-relationship diagrams

454 views • 45 slides

Relational Algebra Maybe -- SQL

473 views • 38 slides

Relational Algebra Maybe -- SQL

455 views • 38 slides

Midterm summary

Midterm summary. Types of data on the web: unstructured, semi-structured, structured Scale and u ncertainty are key features Main goals are to model, search (query) and rank Unstructured : Text Semi-structured : XML, Web graph, Web Applications (TBD)

496 views • 35 slides

Midterm summary

Midterm summary. Types of data on the web: unstructured, semi-structured, structured Scale and u ncertainty are key features Main goals are to model, search (query) and rank Unstructured : Text Semi-structured : XML, Web graph, Web Applications (TBD)

354 views • 35 slides

SQL Introduction

345 views • 34 slides

Lecture 02: SQL

406 views • 33 slides

Lecture 02: SQL

405 views • 33 slides

165 views • 10 slides

178 views • 10 slides

Relational Algebra & Calculus

231 views • 8 slides