'Primary key column' diaporamas de présentation

SQL Workshop

SQL Workshop. Day 1. Day 1 Agenda SQL data selection. Introduction Normalization Tables Unique Key / Primary Key Foreign key SQL Introduction to SQL SELECT, WHERE, ORDER BY Selection from multiple tables Subqueries Practice. Normalization.

962 views • 75 slides

Chapter # 3 The Relational Database Model

Chapter # 3 The Relational Database Model. Relational model View data logically rather than physically Table Structural and data independence Resembles a file conceptually Relational database model easier to understand than hierarchical and network models. A Logical View of Data.

752 views • 58 slides

Chapter # 3 The Relational Database Model

Chapter # 3 The Relational Database Model. Relational model View data logically rather than physically Table Structural and data independence Resembles a file conceptually Relational database model easier to understand than hierarchical and network models. A Logical View of Data.

574 views • 56 slides

618 views • 53 slides

Concepts of Database Management Seventh Edition

Concepts of Database Management Seventh Edition. Chapter 5 Database Design 1: Normalization. Objectives. Discuss functional dependence and primary keys Define first normal form, second normal form, and fourth normal form

611 views • 48 slides

The R elational Model

The R elational Model. The R elational Model. Introduction Introduced by Ted Codd at IBM Research in 1970 The relational model represents data in the form of table . Main concept of this model is mathematical relation ie the mapping between sets

524 views • 43 slides