Presentation is loading. Please wait.

Presentation is loading. Please wait.

Introduction to Relational databases

Published byHanna-Mari Hukkanen Modified over 5 years ago

Similar presentations

Presentation on theme: "Introduction to Relational databases"— Presentation transcript:

1 Introduction to Relational databases

2 Introduction to Relational databases
The relational database management systems are based on the relational model, the data and the relationships among data are represented by a collection of tables. A row in a table represents a relationship among a set of values.

3 Example Department Dno Dname Dloc D1 Research Chennai D2
Administration D3 Sales Mumbai Employee Eno Ename Salary Dno E1 Rajan 5000 D1 E2 Raja 6000 E3 Pradeep 8000 D2 E4 Praveen 7000

4 Select Department where =‘chennai’ Result Project : department over dno,dloc

5 Join Department and Employee over dno Result

Download ppt "Introduction to Relational databases"

Similar presentations

1 2011.3 Classwork notes. 2 Find the names of all employees whose salary greater than all managers salary.

Classwork notes. 2 Find the names of all employees whose salary greater than all managers salary.
Defined by Edgar Codd in 1970 Defined by Edgar Codd in 1970 Considered ingenious but impractical Considered ingenious but impractical Conceptually simple.

Defined by Edgar Codd in 1970 Defined by Edgar Codd in 1970 Considered ingenious but impractical Considered ingenious but impractical Conceptually simple.
Data Model 11 After this lecture, you should be able to:  Use E-R Model effectively to design a database from requirements.  Know to convert from E-R.

Data Model 11 After this lecture, you should be able to:  Use E-R Model effectively to design a database from requirements.  Know to convert from E-R.
6.830/6.814 Lecture 5 Database Internals Continued September 17, 2014.

6.830/6.814 Lecture 5 Database Internals Continued September 17, 2014.
Chapter 5 Recursion in SQL. 2 Example. Let Flights(Flight#, Source_Ctiy, Dest_City) be a relational schema DEN CHI SFO DAL NY UA 930 DL 900 UA 1400 UA.

Chapter 5 Recursion in SQL. 2 Example. Let Flights(Flight#, Source_Ctiy, Dest_City) be a relational schema DEN CHI SFO DAL NY UA 930 DL 900 UA 1400 UA.
ACCESS PART 2. Objectives Database Tables Table Parts Key Field Query and Reports Import from Excel Link to Excel.

ACCESS PART 2. Objectives Database Tables Table Parts Key Field Query and Reports Import from Excel Link to Excel.
Copyright © 2004 Pearson Education, Inc.. Chapter 11 Relational Database Design Algorithms and Further Dependencies.

Copyright © 2004 Pearson Education, Inc.. Chapter 11 Relational Database Design Algorithms and Further Dependencies.
Introduction to Database ISYS 363. File Concepts File consists of a group of records. Each record contains a group of fields. Example: Student file –SIDSnameMajorSexGPA.

Introduction to Database ISYS 363. File Concepts File consists of a group of records. Each record contains a group of fields. Example: Student file –SIDSnameMajorSexGPA.
Chapter 3 An Introduction to Relational Databases.

Chapter 3 An Introduction to Relational Databases.
Introduction to Database ISYS 363. File Concepts File consists of a group of records. Each record contains a group of fields. Example: Student file –SIDSnameMajorSexGPA.

Introduction to Database ISYS 363. File Concepts File consists of a group of records. Each record contains a group of fields. Example: Student file –SIDSnameMajorSexGPA.
LBSC 690 Session #8 SQL and Web Applications Jimmy Lin The iSchool University of Maryland Wednesday, October 22, 2008 This work is licensed under a Creative.

LBSC 690 Session #8 SQL and Web Applications Jimmy Lin The iSchool University of Maryland Wednesday, October 22, 2008 This work is licensed under a Creative.
1 times table 2 times table 3 times table 4 times table 5 times table

1 times table 2 times table 3 times table 4 times table 5 times table
AN INTRODUCTION TO EXECUTION PLAN OF QUERIES These slides have been adapted from a presentation originally made by ORACLE. The full set of original slides.

AN INTRODUCTION TO EXECUTION PLAN OF QUERIES These slides have been adapted from a presentation originally made by ORACLE. The full set of original slides.
Ch 6: ER to Relational Mapping

Ch 6: ER to Relational Mapping
1. 2 icoffey ****** 3 decimal numbers 4 5 6 Sales.

1. 2 icoffey ****** 3 decimal numbers Sales.
Chapter 5 Advanced SQL. 2 Recursion in SQL Example. Let Flights(Flight#, Source_City, Dest_City) be a relational schema DEN CHI SFO DAL NY UA 930 DL 900.

Chapter 5 Advanced SQL. 2 Recursion in SQL Example. Let Flights(Flight#, Source_City, Dest_City) be a relational schema DEN CHI SFO DAL NY UA 930 DL 900.
Relational Model Concepts. The relational model represents the database as a collection of relations. Each relation resembles a table of values. A table.

Relational Model Concepts. The relational model represents the database as a collection of relations. Each relation resembles a table of values. A table.
1 ICS 184: Introduction to Data Management Lecture Note 10 SQL as a Query Language (Cont.)

1 ICS 184: Introduction to Data Management Lecture Note 10 SQL as a Query Language (Cont.)
1 CS 430 Database Theory Winter 2005 Lecture 12: SQL DML - SELECT.

1 CS 430 Database Theory Winter 2005 Lecture 12: SQL DML - SELECT.
Views. Logical data is how we want to see the current data in our database. Physical data is how this data is actually placed in our database.

Views. Logical data is how we want to see the current data in our database. Physical data is how this data is actually placed in our database.

Similar presentations

Ads by Google